Bug#1000481: encountered this bug on a POS system (Toshiba Surepos 500) running the same graphic chip
Hello,
the bug is still exists in kernel version 5.10.106 (32 bit).
Also tried a newer kernel linux-image-5.16.0-0.bpo.4 from
bullseye-backports, with the same result.
Symptoms:
The monitor gets blank when the i915 changes resolution on boot.
The PC remains accessible (ssh).
xrandr shows no monitor connected. Somehow the i915 driver is not
detecting the built-in monitor when resolution is changing on boot.
$ xrandr
Screen 0: minimum 8 x 8, current 1024 x 768, maximum 32767 x 32767
VGA1 disconnected primary (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
Connecting an external VGA monitor works without issues.
The intel_iommu=off does not work.
Some details about the system below:
lspci
..
00:02.0 VGA compatible controller: Intel Corporation 82Q35 Express
Integrated Graphics Controller (rev 02)
$ dmesg | grep 915
[ 8.816308] i915 0000:00:02.0: vgaarb: deactivate vga console
[ 8.846333] i915 0000:00:02.0: [drm] Failed to find VBIOS tables (VBT)
[ 8.846882] i915 0000:00:02.0: vgaarb: changed VGA decodes:
olddecodes=io+mem,decodes=io+mem:owns=io+mem
[ 9.116269] i915 0000:00:02.0: [drm] Initialized overlay support.
[ 9.118527] [drm] Initialized i915 1.6.0 20200917 for 0000:00:02.0 on
minor 0
[ 9.163178] fbcon: i915drmfb (fb0) is primary device
[ 9.203620] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device
Thank you
Bogdan
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