On 07.06.2025 10:40 Uhr Dietrich Meyer wrote: > I have installed Debian 12.11 using non-free-firmware, > During the installation, both the internal screen and an external > HDMI monitor worked, although the internal monitor was rotated by 90°.
IIRC those displays are portrait type and you need to rotate them in the OS. The new OS doesn't know that the portrait display isn't mounted this way. A German blogger also had this issue. https://www.danisch.de/blog/2025/04/25/gedrehte-displays/ > However, when booting the installed system, I see the following: > Grub menu on both screens, but internal screen rotated by 90° > After "Loading initial RAM disk", the internal monitor goes blank > (backlight still on). The HDMI monitor works flawlessly. What happens of you boot it up disconnected? > Here is some additional information from the kernel log: > ------------------------------------------------------------------------------------------------------------- > root@capys:~# dmesg |grep i915 > [ 2.405964] i915 0000:00:02.0: [drm] VT-d active for gfx access > [ 2.406382] i915 0000:00:02.0: vgaarb: deactivate vga console > [ 2.406546] i915 0000:00:02.0: [drm] Using Transparent Hugepages > [ 2.407685] i915 0000:00:02.0: vgaarb: changed VGA decodes: > olddecodes=io+mem,decodes=io+mem:owns=io+mem > [ 2.407841] i915 0000:00:02.0: firmware: direct-loading firmware > i915/ adlp_dmc_ver2_16.bin > [ 2.411245] i915 0000:00:02.0: [drm] Finished loading DMC firmware > i915/ adlp_dmc_ver2_16.bin (v2.16) > [ 2.413885] i915 0000:00:02.0: [drm] [ENCODER:203:DSI A] is > disabled/in DSI mode with an ungated DDI clock, gate it > [ 2.414268] i915 0000:00:02.0: firmware: direct-loading firmware > i915/ tgl_guc_70.bin > [ 2.414593] i915 0000:00:02.0: firmware: direct-loading firmware > i915/ tgl_huc.bin > [ 2.550483] i915 0000:00:02.0: [drm] GuC firmware > i915/tgl_guc_70.bin version 70.5.1 > [ 2.550494] i915 0000:00:02.0: [drm] HuC firmware i915/tgl_huc.bin > version 7.9.3 > [ 2.558930] i915 0000:00:02.0: [drm] HuC authenticated > [ 2.559461] i915 0000:00:02.0: [drm] GuC submission enabled > [ 2.559465] i915 0000:00:02.0: [drm] GuC SLPC enabled > [ 2.559814] i915 0000:00:02.0: [drm] GuC RC: enabled > [ 3.189858] i915 0000:00:02.0: [drm] *ERROR* hback porch < 16 > pixels [ 3.317509] [drm] Initialized i915 1.6.0 20201103 for > 0000:00:02.0 on minor > > 0 > [ 3.336624] fbcon: i915drmfb (fb0) is primary device > [ 3.958606] i915 0000:00:02.0: [drm] *ERROR* hback porch < 16 > pixels [ 4.101596] i915 0000:00:02.0: [drm] fb0: i915drmfb frame > buffer device [ 19.616387] snd_hda_intel 0000:00:1f.3: bound > 0000:00:02.0 (ops i915_audio_component_bind_ops [i915]) > [ 19.709908] mei_hdcp > 0000:00:16.0-b638ab7e-94e2-4ea2-a552-d1c54b627f04: bound 0000:00:02.0 > (ops i915_hdcp_component_ops [i915]) [ 89.886760] i915 > 0000:00:02.0: [drm] *ERROR* hback porch < 16 pixels [ 384.898665] > i915 0000:00:02.0: [drm] *ERROR* hback porch < 16 pixels I think this is the part you should discuss on the mailing list for the i915 driver. > ------------------------------------------------------------------------------------------------------------- > dm@capys:~$ xrandr > Screen 0: minimum 320 x 200, current 2720 x 1280, maximum 16384 x > 16384 DSI-1 connected 800x1280+1920+0 (normal left inverted right x > axis y axis) 0mm x 0mm Does it work to change rotation of DSI-1 with xrandr? -- kind regards Marco Send spam to 1749285602mu...@stinkedores.dorfdsl.de
