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Debian hangs (PREEMPT RT?)

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  Debian hangs (PREEMPT RT?) Malte Schmidt <malte.schmidt@gmx.de> - 2020-06-25 22:20 +0200
    Re: Debian hangs (PREEMPT RT?) Alberto Sentieri <22t@tripolho.com> - 2020-06-25 23:30 +0200

#224024 — Debian hangs (PREEMPT RT?)

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Dear all,

I'm running Debian 10 with the recent updates using a RT Kernel to run a
Machine using Linuxcnc. I face the problem that Debian "hangs" i.e. becomes
completely unresponsive. This includes Keyboard, Mouse and also the SysReq
+ REISUB does no longer work. The system does not really "crash" i.e. I
keep seeing X. Usually X and keyboard freeze a bit before the mouse pointer
also stops to move.
I have the feeling that this only occurs when there is a realtime task
running but I cannot say that for sure.

Not sure if pastebins are appreciated here:
Output of dmesg: https://pastebin.com/zgh6Cw84
Xorg.0.log:https://pastebin.com/eNJCLTWf
/var/log/messages https://pastebin.com/EbJh4qYY

I did spot anything obvious in the logs

This PC was used for a couple of years for Machine control running a
Realtime Kernel on Debian 7

I'm a bit clueless at this point and would appreciate hints what to check
for.

Thanks,
Malte

-- 
Robert Hirsch und Malte Schmidt
Adverrun Drives
Fruehlingstr. 41
90537 Feucht
info@adverrun.com

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#224027

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I had a similar problem, but I could ssh into the machine, otherwise I 
would say it was locked. My problem was the video driver (NVIDIA card). 
I fixed it by installing the manufacture driver.

On 6/25/20 3:54 PM, Malte Schmidt wrote:
> Dear all,
>
> I'm running Debian 10 with the recent updates using a RT Kernel to run 
> a Machine using Linuxcnc. I face the problem that Debian "hangs" i.e. 
> becomes completely unresponsive. This includes Keyboard, Mouse and 
> also the SysReq + REISUB does no longer work. The system does not 
> really "crash" i.e. I keep seeing X. Usually X and keyboard freeze a 
> bit before the mouse pointer also stops to move.
> I have the feeling that this only occurs when there is a realtime task 
> running but I cannot say that for sure.
>
> Not sure if pastebins are appreciated here:
> Output of dmesg: https://pastebin.com/zgh6Cw84
> Xorg.0.log:https://pastebin.com/eNJCLTWf
> /var/log/messages https://pastebin.com/EbJh4qYY
>
> I did spot anything obvious in the logs
>
> This PC was used for a couple of years for Machine control running a 
> Realtime Kernel on Debian 7
>
> I'm a bit clueless at this point and would appreciate hints what to 
> check for.
>
> Thanks,
> Malte
>
> -- 
> Robert Hirsch und Malte Schmidt
> Adverrun Drives
> Fruehlingstr. 41
> 90537 Feucht
> info@adverrun.com <mailto:info@adverrun.com>
>

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