12.0-RC1 drm_atomic panic (supervisor read data, protection violation)

[matias at pizarro.net]

Sorry, I forgot to mention I am using the on-board UHD Graphics 620

On 19/11/2018 18:37, matias at pizarro.net wrote:
> Hello everyone,
> 
> Thanks for your great work that allows me to use a real OS on my work 
> machine.
> 
> I have been tracking 12-CURRENT on a ThinkPad T450 without issues
> until now. I just got myself a T480 and rolled out 12.0-BETA4 and then
> RC1, with the same packages but I am getting a panic when launching
> either Sublime Text 3 or Textadept. All my other packages (mpv,
> libreoffice, Inkscape, Firefox, Chromium, Xfe etc...) are working fine
> but these two, which are linux binaries (relevant?), trigger the
> panic, both in BETA4 and RC1, using drm-stable-kmod or drm-next-kmod,
> from quarterly or latest pkg repos.
> At the moment I have
> $ pkg info -d drm-next-kmod
> drm-next-kmod-4.11.g20181027_1:
>         gpu-firmware-kmod-g20181104
> 
> Bearing in mind these are running on different hardware:
>     - works, self-compiled kernel:
>         FreeBSD lenovo01 12.0-CURRENT FreeBSD 12.0-CURRENT #0 r334644 
> amd64
>     - panics, fresh install from BETA4 image, binary-updated to RC1:
>         FreeBSD lenovo01 12.0-RC1 FreeBSD 12.0-RC1 r340470 GENERIC  
> amd64
> 
> After 12 hours of trying to sort this out I have run out of ideas. I
> would appreciate it if you could help me figure out what should my
> next steps be.
> I could, for instance:
>     1) Roll-out 12.0-RC1 on a BE on the machine that works to see if
> the issue is linked with the change of hardware
>     2) Roll-out 12-CURRENT r334644 on a BE on the panicking machine to
> see if the issue is linked to the change of kernel
>     3) Compile a DEBUG kernel on the panicking machine to help you
> diagnose the issue
>     4) Roll out a patched kernel if the included information inspires
> you an idea for a patch
> 
> I have no idea of C or kernel hacking but I am confortable with
> compiling custom kernels or building ports.
> 
> I have put the following in a gist, though I include here an extract
> of part of the dump report to (hopefully) whet your appetite:
>     - /var/crash/core.txt, that contains full boot log, ps -axlww,
> vmstat -s | -m | -z
>     - /boot/loader.conf
>     - /etc/rc.conf
>     - /etc/sysctl.conf
>     - /var/log/Xorg.0.log (I am not using any Xorg configuration)
> 
> gist URL: 
> https://gist.github.com/rebost/1a2bbfc45e9273ae5a76a98c3a67a23d
> 
> I also have the actual vmcore dump at hand if necessary, but that's 
> 1,4GB.
> 
> If there is anything else I can help you help me with, just let me know
> 
> Thanks for your help, past and future.
> 
> -- matías
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