Bug 107817

Summary:	NV50 : Nvidia NVS295 - Printing out EDID errors about not connected monitor ports
Product:	xorg	Reporter:	cezdhzez
Component:	Driver/nouveau	Assignee:	Nouveau Project <nouveau>
Status:	RESOLVED MOVED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	minor
Priority:	medium
Version:	unspecified
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description cezdhzez 2018-09-03 16:12:43 UTC

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

Comment 1 Ilia Mirkin 2018-09-05 00:17:33 UTC

Should be fixed by:

https://github.com/skeggsb/nouveau/commit/c122b4b8854c3ac7d1d5a8fd902b54e9e42a27ac

Ben -- probably worth backporting...

Comment 2 Martin Peres 2019-12-04 09:44:38 UTC

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