DDC pin sanitation removal leads to no outputs (bisected)

System is a Debian 10 amd64. Mainboard is an Asus B360M-A with latest bios. Latest working kernel is 6.5, first broken is 6.6. A monitor on HDMI port and another on VGA one.

Issue happen always: when PC boots, x doesn't start. And during reboot an i915 crash happens. In detail, VGA monitor remains off, HDMI one only show a black screen where you can move mouse cursor.

I already did a bisect from 6.5 to 6.6 https://bugzilla.kernel.org/show_bug.cgi?id=218098 bisect ended with

first bad commit: [49d4648b65d03752904ac945aefa60044329a9a3] drm/i915: Remove DDC pin sanitation

Now I've tried with drmtip: same issue during startup, but I don't see crash in shutdown

dmesg-drmtip-startup dmesg-drmtip-shutdown

Edited Nov 06, 2023 by valerio-vanni

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DDC pin sanitation removal leads to no outputs (bisected)