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Anyone else seen this.

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  Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-03 16:21 +0100
    Re: Anyone else seen this. Andy Burns <usenet@andyburns.uk> - 2026-07-03 16:37 +0100
      Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-03 22:10 +0100
    Re: Anyone else seen this. [Draytek rebooting] jkn <jkn+nin@nicorp.co.uk> - 2026-07-03 16:45 +0100
      Re: Anyone else seen this. [Draytek rebooting] jkn <jkn+nin@nicorp.co.uk> - 2026-07-03 18:52 +0100
        Re: Anyone else seen this. [Draytek rebooting] The Natural Philosopher <tnp@invalid.invalid> - 2026-07-03 22:17 +0100
      Re: Anyone else seen this. [Draytek rebooting] The Natural Philosopher <tnp@invalid.invalid> - 2026-07-03 22:16 +0100
        Re: Anyone else seen this. [Draytek rebooting] jkn <jkn+nin@nicorp.co.uk> - 2026-07-03 22:29 +0100
          Re: Anyone else seen this. [Draytek rebooting] Theo <theom+news@chiark.greenend.org.uk> - 2026-07-04 00:33 +0100
            Re: Anyone else seen this. [Draytek rebooting] jkn <jkn+nin@nicorp.co.uk> - 2026-07-04 07:45 +0100
              Re: Anyone else seen this. [Draytek rebooting] The Natural Philosopher <tnp@invalid.invalid> - 2026-07-04 12:39 +0100
    Re: Anyone else seen this. Theo <theom+news@chiark.greenend.org.uk> - 2026-07-03 17:43 +0100
      Re: Anyone else seen this. Richard Kettlewell <invalid@invalid.invalid> - 2026-07-03 22:09 +0100
        Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-03 22:46 +0100
        Re: Anyone else seen this. Pancho <Pancho.Jones@protonmail.com> - 2026-07-03 23:14 +0100
      Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-03 22:20 +0100
    Re: Anyone else seen this. Adrian <diy@ku.gro.lioff> - 2026-07-03 17:51 +0100
      Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-03 22:26 +0100
    Re: Anyone else seen this. Pancho <Pancho.Jones@protonmail.com> - 2026-07-03 19:28 +0100
      Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-03 22:28 +0100
    Re: Anyone else seen this. "Jeff Gaines" <jgnewsid@outlook.com> - 2026-07-03 19:38 +0000
    Re: Anyone else seen this. John Rumm <see.my.signature@nowhere.null> - 2026-07-03 21:15 +0100
      Re: Anyone else seen this. jkn <jkn+nin@nicorp.co.uk> - 2026-07-03 22:32 +0100
        Re: Anyone else seen this. John Rumm <see.my.signature@nowhere.null> - 2026-07-04 00:30 +0100
          Re: Anyone else seen this. jkn <jkn+nin@nicorp.co.uk> - 2026-07-04 08:55 +0100
            Re: Anyone else seen this. John Rumm <see.my.signature@nowhere.null> - 2026-07-04 12:36 +0100
    Re: Anyone else seen this. Rich <rich@example.invalid> - 2026-07-04 05:30 +0000
    Re: Anyone else seen this. alan_m <junk@admac.myzen.co.uk> - 2026-07-04 11:23 +0100
      Re: Anyone else seen this. Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-07-04 17:06 +0000
        Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-04 19:08 +0100
        Re: Anyone else seen this. c186282 <c186282@nnada.net> - 2026-07-05 02:36 -0400
      Re: Anyone else seen this. tony sayer <tony@bancom.co.uk> - 2026-07-04 22:05 +0100
        Re: Anyone else seen this. jkn <jkn+nin@nicorp.co.uk> - 2026-07-04 23:19 +0100
          Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-05 10:28 +0100
            Re: Anyone else seen this. jkn <jkn+nin@nicorp.co.uk> - 2026-07-05 10:38 +0100
              Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-05 10:53 +0100
                Re: Anyone else seen this. jkn <jkn+nin@nicorp.co.uk> - 2026-07-05 19:24 +0100
                  Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-05 23:55 +0100
            Re: Anyone else seen this. alan_m <junk@admac.myzen.co.uk> - 2026-07-05 12:05 +0100
              Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-05 13:57 +0100
          Re: Anyone else seen this. tony sayer <tony@bancom.co.uk> - 2026-07-06 13:01 +0100
            Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-06 13:15 +0100
              Re: Anyone else seen this. Rich <rich@example.invalid> - 2026-07-06 14:15 +0000
                Re: Anyone else seen this. "Carlos E. R." <robin_listas@es.invalid> - 2026-07-06 20:00 +0200
                  Re: Anyone else seen this. Rich <rich@example.invalid> - 2026-07-06 19:55 +0000
                Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-07 09:12 +0100
        Re: Anyone else seen this. alan_m <junk@admac.myzen.co.uk> - 2026-07-05 09:18 +0100
          Re: Anyone else seen this. jkn <jkn+nin@nicorp.co.uk> - 2026-07-05 10:40 +0100
            Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-05 10:54 +0100
              Re: Anyone else seen this. tony sayer <tony@bancom.co.uk> - 2026-07-06 13:06 +0100
                Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-06 13:18 +0100
            Re: Anyone else seen this. alan_m <junk@admac.myzen.co.uk> - 2026-07-05 12:32 +0100
              Re: Anyone else seen this. jkn <jkn+nin@nicorp.co.uk> - 2026-07-05 17:24 +0100
          Re: Anyone else seen this. c186282 <c186282@nnada.net> - 2026-07-06 00:49 -0400
            Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-06 12:24 +0100
    Re: Anyone else seen this. "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2026-07-04 21:52 +0800
      Re: Anyone else seen this. c186282 <c186282@nnada.net> - 2026-07-04 23:34 -0400
        Re: Anyone else seen this. The Natural Philosopher <tnp@invalid.invalid> - 2026-07-05 10:50 +0100

Page 2 of 3 — ← Prev page 1 [2] 3  Next page →

#88614

On 03/07/2026 in message <1128k1p$3fgrb$1@dont-email.me> The Natural 
Philosopher wrote:

>Recently my router (Draytek 2726) has been spontaneously rebooting.
>
>Examination of the logs show a kernel panic caused by 'attempt to execute 
>an illegal instruction'.
>
>My assumption, possibly erroneous, is that the actual firmware code is 
>corrupted
>The router is rated only to +45°C but that is the recommended limit for 
>flash memory, and the room temperature has been up towards 40°C. which 
>doesn't leave a great deal of margin for router internal heat production.
>My query is whether anyone else has seen issues with flash memory in the 
>recent hear wave.
>
>Surely phones get hotter than this?
>
>Genuinely interested in other's experiences.

Not a router but my Freesat box turned the HDD off a few times in the 
heatwave due to over heating.

-- 
Jeff Gaines Dorset UK
There is absolutely no substitute for a genuine lack of preparation

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#88615

On 03/07/2026 16:21, The Natural Philosopher wrote:

> Recently my router (Draytek 2726) has been spontaneously rebooting.
> 
> Examination of the logs show a kernel panic caused by 'attempt to 
> execute an illegal instruction'.
> 
> My assumption, possibly erroneous, is that the actual firmware code is 
> corrupted
> The router is rated only to +45°C but that is the recommended limit for 
> flash memory, and the room temperature has been up towards 40°C. which 
> doesn't leave a great deal of margin for router internal heat production.
> My query is whether anyone else has seen issues with flash memory in the 
> recent hear wave.
> 
> Surely phones get hotter than this?
> 
> Genuinely interested in other's experiences.

Not noticed any particular pattern of reboots with the current one 
(2927), the previous 2865 might have restarted more frequently - but 
even then only 2 or 3 times a year.

(I think if they detect a sequence of boot time fails, they will revert 
to the previous version of the firmware just in case it was a firmware 
update that caused the problem)

The FTTP sometimes drops out for 10 mins at midnight once every few 
weeks, but I expect that is a ISP issue or something on the PON.

I have a temperature sensor plugged into one of the USB ports on the 
router, and the graph is showing a daily cycle between 40.2 and 40.6 deg 
C at the moment. (it is in a 12U 19" comms cab - but the door is open)

-- 
Cheers,

John.

/=================================================================\
|          Internode Ltd -  http://www.internode.co.uk            |
|-----------------------------------------------------------------|
|        John Rumm - john(at)internode(dot)co(dot)uk              |
\=================================================================/

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#88624

On 03/07/2026 21:15, John Rumm wrote:
> On 03/07/2026 16:21, The Natural Philosopher wrote:
> 
>> Recently my router (Draytek 2726) has been spontaneously rebooting.
>>
>> Examination of the logs show a kernel panic caused by 'attempt to 
>> execute an illegal instruction'.
>>
>> My assumption, possibly erroneous, is that the actual firmware code is 
>> corrupted
>> The router is rated only to +45°C but that is the recommended limit 
>> for flash memory, and the room temperature has been up towards 40°C. 
>> which doesn't leave a great deal of margin for router internal heat 
>> production.
>> My query is whether anyone else has seen issues with flash memory in 
>> the recent hear wave.
>>
>> Surely phones get hotter than this?
>>
>> Genuinely interested in other's experiences.
> 
> Not noticed any particular pattern of reboots with the current one 
> (2927), the previous 2865 might have restarted more frequently - but 
> even then only 2 or 3 times a year.
> 
> (I think if they detect a sequence of boot time fails, they will revert 
> to the previous version of the firmware just in case it was a firmware 
> update that caused the problem)
> 
> The FTTP sometimes drops out for 10 mins at midnight once every few 
> weeks, but I expect that is a ISP issue or something on the PON.
> 
> I have a temperature sensor plugged into one of the USB ports on the 
> router, and the graph is showing a daily cycle between 40.2 and 40.6 deg 
> C at the moment. (it is in a 12U 19" comms cab - but the door is open)
> 

Hi John
	how does that temperature sensor bit work please?

There is a 'USB Application | Temperature Sensor' menu entry on my 
Draytek, but I don't know what it needs to work...

     Thanks
     J^n

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#88627

On 03/07/2026 22:32, jkn wrote:
> On 03/07/2026 21:15, John Rumm wrote:
>> On 03/07/2026 16:21, The Natural Philosopher wrote:
>>
>>> Recently my router (Draytek 2726) has been spontaneously rebooting.
>>>
>>> Examination of the logs show a kernel panic caused by 'attempt to 
>>> execute an illegal instruction'.
>>>
>>> My assumption, possibly erroneous, is that the actual firmware code 
>>> is corrupted
>>> The router is rated only to +45°C but that is the recommended limit 
>>> for flash memory, and the room temperature has been up towards 40°C. 
>>> which doesn't leave a great deal of margin for router internal heat 
>>> production.
>>> My query is whether anyone else has seen issues with flash memory in 
>>> the recent hear wave.
>>>
>>> Surely phones get hotter than this?
>>>
>>> Genuinely interested in other's experiences.
>>
>> Not noticed any particular pattern of reboots with the current one 
>> (2927), the previous 2865 might have restarted more frequently - but 
>> even then only 2 or 3 times a year.
>>
>> (I think if they detect a sequence of boot time fails, they will 
>> revert to the previous version of the firmware just in case it was a 
>> firmware update that caused the problem)
>>
>> The FTTP sometimes drops out for 10 mins at midnight once every few 
>> weeks, but I expect that is a ISP issue or something on the PON.
>>
>> I have a temperature sensor plugged into one of the USB ports on the 
>> router, and the graph is showing a daily cycle between 40.2 and 40.6 
>> deg C at the moment. (it is in a 12U 19" comms cab - but the door is 
>> open)
>>
> 
> Hi John
>      how does that temperature sensor bit work please?

Plug into USB port, and....

> There is a 'USB Application | Temperature Sensor' menu entry on my 
> Draytek, 

Click on that menu entry :-)

but I don't know what it needs to work...

Mine was the original Draytek one, however have a look at:

https://www.draytek.co.uk/support/guides/kb-usb-thermometer-source

-- 
Cheers,

John.

/=================================================================\
|          Internode Ltd -  http://www.internode.co.uk            |
|-----------------------------------------------------------------|
|        John Rumm - john(at)internode(dot)co(dot)uk              |
\=================================================================/

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#88633

On 04/07/2026 00:30, John Rumm wrote:
> On 03/07/2026 22:32, jkn wrote:
>> On 03/07/2026 21:15, John Rumm wrote:
>>> On 03/07/2026 16:21, The Natural Philosopher wrote:
>>>
>>>> Recently my router (Draytek 2726) has been spontaneously rebooting.
>>>>
>>>> Examination of the logs show a kernel panic caused by 'attempt to 
>>>> execute an illegal instruction'.
>>>>
>>>> My assumption, possibly erroneous, is that the actual firmware code 
>>>> is corrupted
>>>> The router is rated only to +45°C but that is the recommended limit 
>>>> for flash memory, and the room temperature has been up towards 40°C. 
>>>> which doesn't leave a great deal of margin for router internal heat 
>>>> production.
>>>> My query is whether anyone else has seen issues with flash memory in 
>>>> the recent hear wave.
>>>>
>>>> Surely phones get hotter than this?
>>>>
>>>> Genuinely interested in other's experiences.
>>>
>>> Not noticed any particular pattern of reboots with the current one 
>>> (2927), the previous 2865 might have restarted more frequently - but 
>>> even then only 2 or 3 times a year.
>>>
>>> (I think if they detect a sequence of boot time fails, they will 
>>> revert to the previous version of the firmware just in case it was a 
>>> firmware update that caused the problem)
>>>
>>> The FTTP sometimes drops out for 10 mins at midnight once every few 
>>> weeks, but I expect that is a ISP issue or something on the PON.
>>>
>>> I have a temperature sensor plugged into one of the USB ports on the 
>>> router, and the graph is showing a daily cycle between 40.2 and 40.6 
>>> deg C at the moment. (it is in a 12U 19" comms cab - but the door is 
>>> open)
>>>
>>
>> Hi John
>>      how does that temperature sensor bit work please?
> 
> Plug into USB port, and....
> 
>> There is a 'USB Application | Temperature Sensor' menu entry on my 
>> Draytek, 
> 
> Click on that menu entry :-)
> 
> but I don't know what it needs to work...
> 
> Mine was the original Draytek one, however have a look at:
> 
> https://www.draytek.co.uk/support/guides/kb-usb-thermometer-source
> 
Yeah, I found that just after asking - thanks.
Looks like these are about a tenner each, from various sources. I guess 
I was hoping there was a mechanism to report the router's *internal* 
temperature though...

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#88636

On 04/07/2026 08:55, jkn wrote:
> On 04/07/2026 00:30, John Rumm wrote:
>> On 03/07/2026 22:32, jkn wrote:
>>> On 03/07/2026 21:15, John Rumm wrote:
>>>> On 03/07/2026 16:21, The Natural Philosopher wrote:
>>>>
>>>>> Recently my router (Draytek 2726) has been spontaneously rebooting.
>>>>>
>>>>> Examination of the logs show a kernel panic caused by 'attempt to 
>>>>> execute an illegal instruction'.
>>>>>
>>>>> My assumption, possibly erroneous, is that the actual firmware code 
>>>>> is corrupted
>>>>> The router is rated only to +45°C but that is the recommended limit 
>>>>> for flash memory, and the room temperature has been up towards 
>>>>> 40°C. which doesn't leave a great deal of margin for router 
>>>>> internal heat production.
>>>>> My query is whether anyone else has seen issues with flash memory 
>>>>> in the recent hear wave.
>>>>>
>>>>> Surely phones get hotter than this?
>>>>>
>>>>> Genuinely interested in other's experiences.
>>>>
>>>> Not noticed any particular pattern of reboots with the current one 
>>>> (2927), the previous 2865 might have restarted more frequently - but 
>>>> even then only 2 or 3 times a year.
>>>>
>>>> (I think if they detect a sequence of boot time fails, they will 
>>>> revert to the previous version of the firmware just in case it was a 
>>>> firmware update that caused the problem)
>>>>
>>>> The FTTP sometimes drops out for 10 mins at midnight once every few 
>>>> weeks, but I expect that is a ISP issue or something on the PON.
>>>>
>>>> I have a temperature sensor plugged into one of the USB ports on the 
>>>> router, and the graph is showing a daily cycle between 40.2 and 40.6 
>>>> deg C at the moment. (it is in a 12U 19" comms cab - but the door is 
>>>> open)
>>>>
>>>
>>> Hi John
>>>      how does that temperature sensor bit work please?
>>
>> Plug into USB port, and....
>>
>>> There is a 'USB Application | Temperature Sensor' menu entry on my 
>>> Draytek, 
>>
>> Click on that menu entry :-)
>>
>> but I don't know what it needs to work...
>>
>> Mine was the original Draytek one, however have a look at:
>>
>> https://www.draytek.co.uk/support/guides/kb-usb-thermometer-source
>>
> Yeah, I found that just after asking - thanks.
> Looks like these are about a tenner each, from various sources. I guess 
> I was hoping there was a mechanism to report the router's *internal* 
> temperature though...


To an extent, that is what you will get if you plug it directly into the 
router's USB socket without an extension lead - the USB socket will be 
at or near the mobo temperature. If you do use an extension lead, then 
you could sit the sensing bit on top of the router case above the vents. 
Or, you could go with a sensor that has a remote probe like:

https://thepihut.com/products/temper2-usb-dual-temperature-sensor

and place the probe inside the case.

For what it is worth, I have used lots of Draytek routers for the last 
20 years or so, and overheating has not been an issue generally. I don't 
even think I have had a router[1] fail - although have had a couple of 
PSUs die.

[1] I have had some of the external ADSL to ethernet modems like the 
V120 die or at least become unreliable and disconnect at random.


-- 
Cheers,

John.

/=================================================================\
|          Internode Ltd -  http://www.internode.co.uk            |
|-----------------------------------------------------------------|
|        John Rumm - john(at)internode(dot)co(dot)uk              |
\=================================================================/

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#88629

In comp.os.linux.misc The Natural Philosopher <tnp@invalid.invalid> wrote:
> Recently my router (Draytek 2726) has been spontaneously rebooting.
> 
> Examination of the logs show a kernel panic caused by 'attempt to 
> execute an illegal instruction'.
> 
> My assumption, possibly erroneous, is that the actual firmware code is 
> corrupted

Do you have logs for multiple reboots?  If yes, do they show the 
"illegal instruction" panic at the same address/instruction?

Corrupted firmware should show the same panic each time the issue 
occurs (because the false change to the stored firmware would remain at 
the same firmware address).

> The router is rated only to +45°C but that is the recommended limit for 
> flash memory, and the room temperature has been up towards 40°C. which 
> doesn't leave a great deal of margin for router internal heat production.
> My query is whether anyone else has seen issues with flash memory in the 
> recent hear wave.

If the logs show illegal instructions at differing addresses that 
points towards some borderline component (which may still be the flash) 
that exceeds the systems ability to compensate when the temp is this 
high.  Other possibilities could be the CPU itself may, above a certian 
temp, simply become flakey.  Depending upon what specific CPU the CPU 
may be the warmest, or second warmest, component in the entire system 
and with a 40C room temperature it may be operating at a point where it 
randomly glitches.  It could also be something as mundane as a power 
supply capicator that has partly dried out, and at the higher ambient 
operating temperature it is allowing more ripple to pass through to the 
DC rails, resulting in occasional random corruption of data somewhere 
due to that ripple.

> Surely phones get hotter than this?

It is possible that phones may use higher temp rated components.

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#88635

On 03/07/2026 16:21, The Natural Philosopher wrote:
> Recently my router (Draytek 2726) has been spontaneously rebooting.
> 
> Examination of the logs show a kernel panic caused by 'attempt to 
> execute an illegal instruction'.
> 
> My assumption, possibly erroneous, is that the actual firmware code is 
> corrupted
> The router is rated only to +45°C but that is the recommended limit for 
> flash memory, and the room temperature has been up towards 40°C. which 
> doesn't leave a great deal of margin for router internal heat production.
> My query is whether anyone else has seen issues with flash memory in the 
> recent hear wave.
> 
> Surely phones get hotter than this?
> 
> Genuinely interested in other's experiences.
> 

Not router or flash memory but I had experience of set top boxes 
overheating and becoming unreliable usually because the feet they fit to 
the boxes only allows a few millimetres of air to circulate under the 
box. I've often fitted taller feet and/or put the boxes on a a couple of 
pieces of 2"x1" timber to increase the air flow beneath the box. Also I 
don't stack one box on top of another that may be generating heat nor 
operate the boxes in an enclosed cabinet.

-- 
mailto : news {at} admac {dot} myzen {dot} co {dot} uk

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#88640

On 2026-07-04, alan_m <junk@admac.myzen.co.uk> wrote:

> Not router or flash memory but I had experience of set top boxes 
> overheating and becoming unreliable usually because the feet they fit to 
> the boxes only allows a few millimetres of air to circulate under the 
> box. I've often fitted taller feet and/or put the boxes on a a couple of 
> pieces of 2"x1" timber to increase the air flow beneath the box. Also I 
> don't stack one box on top of another that may be generating heat nor 
> operate the boxes in an enclosed cabinet.

I stood ours on its side; that seemed to help.

-- 
/~\  Charlie Gibbs                  |  No artificial
\ /  <cgibbs@kltpzyxm.invalid>      |  intelligence was
 X   I'm really at ac.dekanfrus     |  used in the creation
/ \  if you read it the right way.  |  of this post.

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#88643

On 04/07/2026 18:06, Charlie Gibbs wrote:
> On 2026-07-04, alan_m <junk@admac.myzen.co.uk> wrote:
> 
>> Not router or flash memory but I had experience of set top boxes
>> overheating and becoming unreliable usually because the feet they fit to
>> the boxes only allows a few millimetres of air to circulate under the
>> box. I've often fitted taller feet and/or put the boxes on a a couple of
>> pieces of 2"x1" timber to increase the air flow beneath the box. Also I
>> don't stack one box on top of another that may be generating heat nor
>> operate the boxes in an enclosed cabinet.
> 
> I stood ours on its side; that seemed to help.
> 
It is a very effective first step

You effectively double the area to convect heat away from the unit

-- 
I was brought up to believe that you should never give offence if you 
can avoid it; the new culture tells us you should always take offence if 
you can. There are now experts in the art of taking offence, indeed 
whole academic subjects, such as 'gender studies', devoted to it.

Sir Roger Scruton

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#88664

On 7/4/26 13:06, Charlie Gibbs wrote:
> On 2026-07-04, alan_m <junk@admac.myzen.co.uk> wrote:
> 
>> Not router or flash memory but I had experience of set top boxes
>> overheating and becoming unreliable usually because the feet they fit to
>> the boxes only allows a few millimetres of air to circulate under the
>> box. I've often fitted taller feet and/or put the boxes on a a couple of
>> pieces of 2"x1" timber to increase the air flow beneath the box. Also I
>> don't stack one box on top of another that may be generating heat nor
>> operate the boxes in an enclosed cabinet.
> 
> I stood ours on its side; that seemed to help.

   Might, or might not.

   Admittedly the chips these days CAN run hotter
   than in the past.

   Disks/SD/etc may not appreciate that much however.
   Storage/utility life really starts to drop above
   50c.

   Anyway, there ARE tiny FANS. Some can plug into
   a USB port. Big improvement. GLUE 'em on to yer
   box if necessary.

   (note 'Alien Tape' - the gecko tech - is very
   good for sticking things and has no glue to
   melt)

   Anyway, not THAT hard to fab a 'cooling box'
   out of Amazon packaging. Cut slots to fit
   your whatever and add a little fan to suck
   or blow. Have a couple of BMax mini-boxes
   and some single-disk USB units sitting in
   one. The 2" fan runs on a 5V 2 amp wall wart
   and there's enough juice to add a second fan.
   Partially opened the drive cases. Makes
   everything run MUCH cooler for a $10 investment
   and about 30 minutes of cutting/bending cardboard
   and packing foam.

   There used to be "Icy Dock" boxes for external
   USB drives. May still be, but I think the prices
   got WAY too. The multi-disk units even had
   hardware RAID if you wanted that.

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#88651

In article <nas58eFlreU1@mid.individual.net>, alan_m
<junk@admac.myzen.co.uk> scribeth thus
>On 03/07/2026 16:21, The Natural Philosopher wrote:
>> Recently my router (Draytek 2726) has been spontaneously rebooting.
>> 
>> Examination of the logs show a kernel panic caused by 'attempt to 
>> execute an illegal instruction'.
>> 
>> My assumption, possibly erroneous, is that the actual firmware code is 
>> corrupted
>> The router is rated only to +45°C but that is the recommended limit for 
>> flash memory, and the room temperature has been up towards 40°C. which 
>> doesn't leave a great deal of margin for router internal heat production.
>> My query is whether anyone else has seen issues with flash memory in the 
>> recent hear wave.
>> 
>> Surely phones get hotter than this?
>> 
>> Genuinely interested in other's experiences.
>> 
>
>Not router or flash memory but I had experience of set top boxes 
>overheating and becoming unreliable usually because the feet they fit to 
>the boxes only allows a few millimetres of air to circulate under the 
>box. I've often fitted taller feet and/or put the boxes on a a couple of 
>pieces of 2"x1" timber to increase the air flow beneath the box. Also I 
>don't stack one box on top of another that may be generating heat nor 
>operate the boxes in an enclosed cabinet.
>

And.. change the mostly useless power supply Capacitors!..
-- 
Tony Sayer


Man is least himself when he talks in his own person. 

Give him a keyboard, and he will reveal himself.

                

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#88652

On 04/07/2026 22:05, tony sayer wrote:
> In article <nas58eFlreU1@mid.individual.net>, alan_m
> <junk@admac.myzen.co.uk> scribeth thus
>> On 03/07/2026 16:21, The Natural Philosopher wrote:
>>> Recently my router (Draytek 2726) has been spontaneously rebooting.
>>>
>>> Examination of the logs show a kernel panic caused by 'attempt to
>>> execute an illegal instruction'.
>>>
>>> My assumption, possibly erroneous, is that the actual firmware code is
>>> corrupted
>>> The router is rated only to +45°C but that is the recommended limit for
>>> flash memory, and the room temperature has been up towards 40°C. which
>>> doesn't leave a great deal of margin for router internal heat production.
>>> My query is whether anyone else has seen issues with flash memory in the
>>> recent hear wave.
>>>
>>> Surely phones get hotter than this?
>>>
>>> Genuinely interested in other's experiences.
>>>
>>
>> Not router or flash memory but I had experience of set top boxes
>> overheating and becoming unreliable usually because the feet they fit to
>> the boxes only allows a few millimetres of air to circulate under the
>> box. I've often fitted taller feet and/or put the boxes on a a couple of
>> pieces of 2"x1" timber to increase the air flow beneath the box. Also I
>> don't stack one box on top of another that may be generating heat nor
>> operate the boxes in an enclosed cabinet.
>>
> 
> And.. change the mostly useless power supply Capacitors!..

Is this actually true, specifically referring to Draytek routers? Or 
just to Set Top Boxen (in which case I probably agree)

I have previously looked for reports of such problems with Draytek kit, 
and found none. I also took a look inside my previous Draytek router 
(when I was getting ADSL issues, see uk.d-i-y thread passim) and all the 
caps looked good (visual only check, I agree)

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#88667

On 04/07/2026 23:19, jkn wrote:
>> And.. change the mostly useless power supply Capacitors!..
> 
> Is this actually true, specifically referring to Draytek routers? Or 
> just to Set Top Boxen (in which case I probably agree)
> 
No. And in fact mostly today capacitors are not as prone to failure as 
they once were.

There was a period where bad chemistry was taking out millions of them. 
They have all gone


> I have previously looked for reports of such problems with Draytek kit, 
> and found none. I also took a look inside my previous Draytek router 
> (when I was getting ADSL issues, see uk.d-i-y thread passim) and all the 
> caps looked good (visual only check, I agree)

The Draytek self-reboot is well documented. PSU degradation or firmware 
bit rot seems the most common cause

I have re-flashed the firmware and it has stayed up since.

-- 
All political activity makes complete sense once the proposition that 
all government is basically a self-legalising protection racket, is 
fully understood.

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#88668

On 05/07/2026 10:28, The Natural Philosopher wrote:
> On 04/07/2026 23:19, jkn wrote:
>>> And.. change the mostly useless power supply Capacitors!..
>>
>> Is this actually true, specifically referring to Draytek routers? Or 
>> just to Set Top Boxen (in which case I probably agree)
>>
> No. And in fact mostly today capacitors are not as prone to failure as 
> they once were.
> 
> There was a period where bad chemistry was taking out millions of them. 
> They have all gone
> 
> 
>> I have previously looked for reports of such problems with Draytek 
>> kit, and found none. I also took a look inside my previous Draytek 
>> router (when I was getting ADSL issues, see uk.d-i-y thread passim) 
>> and all the caps looked good (visual only check, I agree)
> 
> The Draytek self-reboot is well documented. PSU degradation or firmware 
> bit rot seems the most common cause

Can you refer me to this documentation please?
Thanks, J^n

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#88672

On 05/07/2026 10:38, jkn wrote:
> Draytek self-reboot is well documented
https://www.draytek.com/support/knowledge-base/5763
-- 
How fortunate for governments that the people they administer don't think.

Adolf Hitler

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#88687

On 05/07/2026 10:53, The Natural Philosopher wrote:
> On 05/07/2026 10:38, jkn wrote:
>> Draytek self-reboot is well documented
> https://www.draytek.com/support/knowledge-base/5763

On 05/07/2026 10:53, The Natural Philosopher wrote:

"
The Draytek self-reboot is well documented. PSU degradation or firmware 
bit rot seems the most common cause
"


Firmware bit rot not mentioned in that link, which is hardly 'well 
documented'. It's just 'how to get more information if your router seems 
to reboot.

Strange to delete the second part of your quoted text...

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#88696

On 05/07/2026 19:24, jkn wrote:
> On 05/07/2026 10:53, The Natural Philosopher wrote:
>> On 05/07/2026 10:38, jkn wrote:
>>> Draytek self-reboot is well documented
>> https://www.draytek.com/support/knowledge-base/5763
> 
> On 05/07/2026 10:53, The Natural Philosopher wrote:
> 
> "
> The Draytek self-reboot is well documented. PSU degradation or firmware 
> bit rot seems the most common cause
> "
> 
> 
> Firmware bit rot not mentioned in that link, which is hardly 'well 
> documented'. It's just 'how to get more information if your router seems 
> to reboot.
> 
> Strange to delete the second part of your quoted text...
> 
That wasn't the only place - people talked on forums. I went googling. 
Found a lot of hits. Didn't know I needed to write them all down because 
you would attack my integrity.

Why are you trying to make me out as a liar? What would be the point of 
that?

-- 
"When one man dies it's a tragedy. When thousands die it's statistics."

Josef Stalin

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#88674

On 05/07/2026 10:28, The Natural Philosopher wrote:
> On 04/07/2026 23:19, jkn wrote:
>>> And.. change the mostly useless power supply Capacitors!..
>>
>> Is this actually true, specifically referring to Draytek routers? Or 
>> just to Set Top Boxen (in which case I probably agree)
>>
> No. And in fact mostly today capacitors are not as prone to failure as 
> they once were.
> 
> There was a period where bad chemistry was taking out millions of them. 
> They have all gone

Yes, especially equipment that came out of S Korea. Often the ones I've 
had to replace have brand names that maybe pretend that they are from a 
well known company such as SamYoung (Not Samsung!). I've generally found 
that the failed capacitors tend to be physically smaller (often the same 
diameter but shorter) than replacements for reputable capacitor 
manufactures.

There is still the 10C rule for electrolytic capacitors where in general 
the life span doubles with every 10C drop in temperature, and shortens 
by x2 for every 10C increase in temperature.

A reputable capacitor manufacture may quote 10,000 hours at 85C which is 
approx 1.3 years if your equipment is operated continuously at 85C. In 
reality well designed equipment would be running at, say, a maximum of 
60C so life expectancy is 5+ years  when operated continuously.

More reputable equipment manufactures would use capacitors rated and 
10,000 hours at 105C or 10,000 hours @ 125C.  Obviously the latter cost 
more and unlikely to be fitted in cheap electronics. However, for repair 
the difference in price for sourcing a one off of the better specified 
capacitor is minimal vs the cost of 85c capacitor.  The recommendation 
is to always go for the capacitor rated at 105C, and with a low Z, low 
equivalent series resistance (ESR) if fitting to a power supply.



-- 
mailto : news {at} admac {dot} myzen {dot} co {dot} uk

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#88680

On 05/07/2026 12:05, alan_m wrote:
> for repair the difference in price for sourcing a one off of the better 
> specified capacitor is minimal vs the cost of 85c capacitor.  The 
> recommendation is to always go for the capacitor rated at 105C, and with 
> a low Z, low equivalent series resistance (ESR) if fitting to a power 
> supply.

Amen to that.
No one puts the dreaded RIFA mains cap back, either...

-- 
Karl Marx said religion is the opium of the people.
But Marxism is the crack cocaine.

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