Re: Anyone else seen this.

From	jkn <jkn+nin@nicorp.co.uk>
Newsgroups	comp.os.linux.misc, uk.d-i-y
Subject	Re: Anyone else seen this.
Date	2026-07-04 08:55 +0100
Message-ID	<narskdFttjhU1@mid.individual.net> (permalink)
References	<1128k1p$3fgrb$1@dont-email.me> <112959e$3lb6q$2@dont-email.me> <naqo2tFmk5tU2@mid.individual.net> <1129gmg$3osph$1@dont-email.me>

Cross-posted to 2 groups.

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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...

Thread

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. 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

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