Nouveau on >4.12.12 not loading EDID

Submitted by andrewb03@gmail.com

Assigned to Nouveau Project

Link to original bug (#102913)

Description

Created attachment 134394
Arch 4.12.13 dmesg

System: Arch Linux
CPU: AMD Ryzen 1700
Motherboard: Gigabyte AX370 Gaming K7
After an upgrade from Arch Linux kernel 4.12.10 to 4.12.12 (or 4.12.13) the system will hang just before initializing nouveaufb. The system doesn't respond to keyboard or mouse but can be reset with the Ctrl+Alt+Del or accessible via ssh.

If I turn off KMS via nomodeset nouveau.modeset=0, I am able to boot normally but without graphics acceleration.c

The following showed in dmesg from kernel 4.12.13:

[ 12.945435] nouveau 0000:0a:00.0: DRM: DDC responded, but no EDID for DP-1
[ 13.087167] gnome-shell[901]: segfault at 28 ip 00007ffab9d672f5 sp 00007fff5771ba20 error 4 in libmutter-0.so.0.0.0[7ffab9d1d000+139000]
[ 16.264988] nouveau 0000:0a:00.0: DRM: DDC responded, but no EDID for DP-1
[ 16.286324] nouveau 0000:0a:00.0: DRM: DDC responded, but no EDID for DP-1

As a result of this I have to either use the nvidia proprietary drivers or not upgrade.

This seems to be the exact opposite of a 4.12 regression reported where EDID would not load on 4.12 kernels with DP.

I have two PCIe GPUs: GK104 and GP102. Neither are detected on those kernel versions. I tested 4.13 as well and it can't find the EDID either on that kernel version.

Attachment 134394, "Arch 4.12.13 dmesg":
kernel_4.12.13.txt