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NV50 : Nvidia NVS295 - Printing out EDID errors about not connected monitor ports

Submitted by cezdhzez@sharklasers.com

Assigned to Nouveau Project

Link to original bug (#107817)

Description

Card: Nvidia NVS295 with 2 DisplayPort connectors.

Problem: nouveau is spamming the kernel message, that it cant find the EDID of not connected ports. Of course it cant, because there is no monitor connected to that port.

When i connect the monitor to DisplayPort number 1, it writes, that it cant find EDID on DisplayPort number 2. When i connect it to DisplayPort 2, it writes that it cant find EDID of Display Port 1.

Linux kernel version: Kernel 4.19RC2 (its also there on older kernels)

Output when connected to DisplayPort 2 on kernel 4.19RC2 :

[ 1.929715] fb: switching to nouveaufb from EFI VGA
[ 1.930182] nouveau 0000:01:00.0: NVIDIA G98 (298e80a2)
[ 2.064262] nouveau 0000:01:00.0: bios: version 62.98.75.00.08
[ 2.086423] nouveau 0000:01:00.0: fb: 256 MiB GDDR3
[ 2.155387] nouveau 0000:01:00.0: DRM: VRAM: 256 MiB
[ 2.155388] nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
[ 2.155393] nouveau 0000:01:00.0: DRM: TMDS table version 2.0
[ 2.155394] nouveau 0000:01:00.0: DRM: DCB version 4.0
[ 2.155397] nouveau 0000:01:00.0: DRM: DCB outp 00: 02000386 0f200010
[ 2.155399] nouveau 0000:01:00.0: DRM: DCB outp 01: 02000332 00020010
[ 2.155401] nouveau 0000:01:00.0: DRM: DCB outp 02: 040113a6 0f200010
[ 2.155402] nouveau 0000:01:00.0: DRM: DCB outp 03: 04011342 00020010
[ 2.155404] nouveau 0000:01:00.0: DRM: DCB conn 00: 00005046
[ 2.155405] nouveau 0000:01:00.0: DRM: DCB conn 01: 0000a146
[ 2.164991] nouveau 0000:01:00.0: DRM: MM: using M2MF for buffer copies
[ 2.291693] nouveau 0000:01:00.0: DRM: DDC responded, but no EDID for DP-1
[ 2.299041] nouveau 0000:01:00.0: DRM: allocated 1920x1080 fb: 0x50000, bo (ptrval)
[ 2.299785] fbcon: nouveaufb (fb0) is primary device
[ 2.423693] nouveau 0000:01:00.0: DRM: DDC responded, but no EDID for DP-1
[ 2.607694] nouveau 0000:01:00.0: DRM: DDC responded, but no EDID for DP-1
[ 2.616508] nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device
[ 2.631694] [drm] Initialized nouveau 1.3.1 20120801 for 0000:01:00.0 on minor 1
[ 3.283698] nouveau 0000:01:00.0: DRM: DDC responded, but no EDID for DP-1
[ 38.267703] nouveau 0000:01:00.0: DRM: DDC responded, but no EDID for DP-1
[ 38.403699] nouveau 0000:01:00.0: DRM: DDC responded, but no EDID for DP-1
[ 50.075703] nouveau 0000:01:00.0: DRM: DDC responded, but no EDID for DP-1
[ 50.207697] nouveau 0000:01:00.0: DRM: DDC responded, but no EDID for DP-1
[ 53.323704] nouveau 0000:01:00.0: DRM: DDC responded, but no EDID for DP-1
[ 53.455714] nouveau 0000:01:00.0: DRM: DDC responded, but no EDID for DP-1