Debian hangs (PREEMPT RT?)

From	Malte Schmidt <malte.schmidt@gmx.de>
Newsgroups	linux.debian.user
Subject	Debian hangs (PREEMPT RT?)
Date	2020-06-25 22:20 +0200
Message-ID	<AlGvL-4Y3-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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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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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

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