Dannis 't Hart <dannisth...@protonmail.ch> writes:

> Hello,
> It seems I'm not the only one having some trouble with Xorg/xenocara in 
> recent snapshots. Perhaps there is a common cause.
>
> On my laptop (Thinkpad T490S) I use mostly snapshots, troubles are seldom. 
> The snapshot from August 13th worked fine, updating to the snapshot of August 
> 17th seemed to break the startup of Xorg.
>
> I tested also with the snapshots of August 16th and 18th, same problem. So I 
> suspect some change between 13th and 16th must be the cause. So for now I use 
> the snapshot of August 13th, to which I reverted back, which works just fine.
>
> Xorg/xenodm doesn't come up. The screen stays black. The backlight of the 
> laptop screen is on, though. And the cpu is kept quite busy, soon after the 
> attempted start of X the fan is switched on and the temperature increase can 
> easily be felt. After a few minutes, Xorg apparently segfaults and I just get 
> to the regular command line.
>
> I seems the segfault is at or after the loading of the DRI2 module. There is 
> an earlier error (EE in log) about a missing 
> /usr/X11R6/lib/modules/dri/i965_dri.so failed, which has been noted by 
> someone else with the same problem of not being able to start X, but I don't 
> think this is it (although this EE seems funny, I don't think above mentioned 
> file is in base?).
>
> I hope the cause can be identified and fixed!

It should be already fixed (but the commit is recent, so no snapshots
has it for now).

see sys/dev/pci/drm/i915/gem/i915_gem_mman.c rev 1.20
  
https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/dev/pci/drm/i915/gem/i915_gem_mman.c

you could rebuild just the kernel if you can't wait for snapshot.

Thanks.
-- 
Sebastien Marie

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