MAJOR UPDATE: Correct EDID found on DP-3
After a deep search in /sys/devices/, I found that the valid EDID (384 bytes)
is actually located at:
/sys/devices/pci0000:00/0000:00:01.1/0000:02:00.0/drm/card1/card1-DP-3/edid
Important observations:
Other ports (DP-1, DP-2, HDMI) return 0 bytes. It seems there is a
mismatch between physical connection and logical port numbering in the
kernel/driver.
nvidia-settings is completely non-functional, returning "Bad handle"
and "Operation not supported" for almost every attribute.
This confirms the GPU is capable of reading the monitor data, but
the power management failure (likely linked to the INT3515 / USB-C
error) prevents the system from maintaining this link when the monitor
signal is interrupted.
** Attachment added: "working_monitor.edid"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2144584/+attachment/5953245/+files/working_monitor.edid
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Title:
Suspend/Hibernate missing from GNOME menu and causing hard freeze due
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