Re:_-stable_from_today_dumps_core_with_ drm-510-kmod_and_some__graphical_clients

From: Mathias Picker <Mathias.Picker_at_virtual-earth.de>
Date: Mon, 27 Mar 2023 21:43:35 UTC
Am 27. März 2023 23:05:35 MESZ schrieb Cy Schubert <Cy.Schubert@cschubert.com>:
>In message <8b47d0a4-a8f1-1841-ee59-3949fe69cbd7@ShaneWare.Biz>, Shane 
>Ambler w
>rites:
>> On 26/3/23 01:37, Mathias Picker wrote:
>> > 
>> > Starting sddm works fine, starting my normal session crashes or freezes
>> > FreeBSD.
>> > 
>> > I can find no error messages after a reboot.
>> > 
>> > I found out, that I can start xterm or emacs (exwm) without problems,
>> > xrandr works with external screen, but once I start anything more
>> > demanding (I guess demanding of the GPU) everything freezes or FreeBSD
>> > even reboots.
>> > 
>> > “Demanding” means even simple things like qterminal. I tried firefox an
>> d
>> > blender and then I had it with the reboots and didn’t try anything else.
>> > xedit works fine :)
>> > 
>> > I have nothing in the logs, I have no idea where to look or how to debug
>> > this.
>> > 
>> > Any ideas, tipps, help greatly apreciated.
>>
>>
>> FreeBSD Developers Handbook Chapter 10: Kernel Debugging
>>
>> https://docs.freebsd.org/en/books/developers-handbook/kerneldebug/
>>
>> Running stable, kernel dumps may already be enabled, look in /var/crash
>>
>> By enabling a kernel dump when it panics (dumpdev="AUTO" in rc.conf) the
>> kernel core is saved to swap space, then on reboot gets copied to
>> dumpdir (/var/crash) where you can then use kgdb (from devel/gdb) to get
>> a stack trace to find where the panic happened.
>
>drm-*-kmod probably needs a rebuild. Likely a data structure changed. In my 
>experience a simple rebuild of the port solves 90% of drm-*-kmod crash 
>problems.
>
Hi Cy,

sorry I didn't mention that, but I did rebuild drm-kmod, I actually do it after every new kernel build, just to be on the safe side.

I switched my swap to non-encrypted and will look if I can get any information from the kernel dump tomorrow.

Oh, and it's on a Thinkpad X1 Yoga 3rd gen, I just noticed I didn't mention this.


Mathias Picker
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