Re: RC4 still gives me trouble with i915

[Mike Pumford <mpumford%mudcovered.org.uk@localhost>]

On 08/02/2024 16:08, Jörn Clausen wrote:
> Hello!
>
> For the last RCs, I've tested the live image for amd64 on my desktop 
> machine, that has been running 9.x with X for years now. Whenever I 
> start X11, either via "startx" or "/etc/rc.d/xdm onestart", the display 
> gets unusable. I see fragments of ctwm and an Xterm in the first case, 
> and parts of the login display in the second, but the sessions are 
> otherwise broken.
>
> Is this expected behaviour with the live image, or should the correct 
> configuration get picked up? I see no warning in the Xorg.log, 
> everything seems to get detected fine. Please let me know if someone 
> needs debug information beyond the following:
>
> The CPU is
>
> cpu0: "Intel(R) Celeron(R) CPU  J1900  @ 1.99GHz"
> cpu0: Intel Atom E3000, Z3[67]00 (686-class), 2000.22 MHz
> cpu0: family 0x6 model 0x37 stepping 0x8 (id 0x30678)
>
> These are some parts from the messages log:
>
> [     5.009976] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
> [     5.009976] [drm] Driver supports precise vblank timestamp query.
> [     5.009976] i915drmkms0: interrupting at msi4 vec 0 (i915drmkms0)
> [     5.079724] [drm] Initialized i915 1.6.0 20200114 for i915drmkms0 on 
> minor 0
> [     5.099724] intelfb0 at i915drmkms0
> [     5.099724] [drm] DRM_I915_DEBUG enabled
> [     5.099724] [drm] DRM_I915_DEBUG_GEM enabled
> [     5.099724] intelfb0: framebuffer at 0xc0020000, size 1280x1024, 
> depth 32, stride 5120
I had a similar problem but the fix that resolved it for me went in just 
before RC3 so RC4 should have it.

However I do know it didn't fix the issue for everyone as it depends 
just exactly what Intel display chip you have. If you can grap the 
/var/log/Xorg.log output that often identifies the chip. Mine for 
example says:

[361580.187] (II) intel(0): SNA initialized with Haswell (gen7.5, gt2) 
backend

This is with the intel driver. The modesetting driver which is the 
alternative is less helpful in this respect.

Mike