Nouveau: corrupted laptop screen's EDID info

Submitted by pjv

Assigned to Nouveau Project

Link to original bug (#73267)

Description

This is a reopen for #34554. If I'm wrong to report a new issue, please excuse me.

On my Macbook Pro 6,2 (mid 2010) (coincidentally the same as in the above bug), I was suddenly presented with an entirely black screen at a certain boot (morning Dec 29th), and ever since. I did not make any system changes before that cold boot. I do remember the system not shutting off properly the night before.

Symptoms are the same (I have not tested other OSes):
Black internal screen (no backlight) all the way, even the grey EFI bootloader screen is not there. PRAM reset works as normal (and should reset brightness so that is not it). Looked at by Genius bar and they suspected a disconnected LVDS cable, but that does not seem to be the problem.

External monitor works from the linux boot console kernel output on, but no grey EFI bootloader screen. When external monitor is connected, the keyboard lights up as well.

In the dmesg (with external monitor connected):
[ 6.443945] Raw EDID:
[ 6.443948] 00 00 00 00 00 07 4f 00 06 10 bb 9c 00 00 00 00
[ 6.443950] 00 13 01 03 80 21 15 78 0a 50 c5 98 58 52 8e 27
[ 6.443952] 25 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
[ 6.443954] 01 01 01 01 01 01 7c 2e 90 a0 60 1a 1e 40 30 20
[ 6.443956] 36 00 4b cf 10 00 00 18 00 00 00 01 00 06 10 30
[ 6.443958] 00 00 00 00 00 00 00 00 0a 20 00 00 00 fe 00 4c
[ 6.443960] 50 31 35 34 57 45 33 2d 54 4c 42 31 00 00 00 fe
[ 6.443962] 00 43 6f 6c 6f 72 20 4c 43 44 0a 20 20 20 00 dd
[ 6.478432] Raw EDID:
[ 6.478434] 00 00 00 00 00 07 4f 00 06 10 bb 9c 00 00 00 00
[ 6.478437] 00 13 01 03 80 21 15 78 0a 50 c5 98 58 52 8e 27
[ 6.478439] 25 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
[ 6.478441] 01 01 01 01 01 01 7c 2e 90 a0 60 1a 1e 40 30 20
[ 6.478443] 36 00 4b cf 10 00 00 18 00 00 00 01 00 06 10 30
[ 6.478445] 00 00 00 00 00 00 00 00 0a 20 00 00 00 fe 00 4c
[ 6.478447] 50 31 35 34 57 45 33 2d 54 4c 42 31 00 00 00 fe
[ 6.478449] 00 43 6f 6c 6f 72 20 4c 43 44 0a 20 20 20 00 dd
[ 6.512977] Raw EDID:
[ 6.512979] 00 00 00 00 00 07 4f 00 06 10 bb 9c 00 00 00 00
[ 6.512981] 00 13 01 03 80 21 15 78 0a 50 c5 98 58 52 8e 27
[ 6.512983] 25 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
[ 6.512986] 01 01 01 01 01 01 7c 2e 90 a0 60 1a 1e 40 30 20
[ 6.512988] 36 00 4b cf 10 00 00 18 00 00 00 01 00 06 10 30
[ 6.512990] 00 00 00 00 00 00 00 00 0a 20 00 00 00 fe 00 4c
[ 6.512992] 50 31 35 34 57 45 33 2d 54 4c 42 31 00 00 00 fe
[ 6.512994] 00 43 6f 6c 6f 72 20 4c 43 44 0a 20 20 20 00 dd
[ 6.547469] Raw EDID:
[ 6.547471] 00 00 00 00 00 07 4f 00 06 10 bb 9c 00 00 00 00
[ 6.547474] 00 13 01 03 80 21 15 78 0a 50 c5 98 58 52 8e 27
[ 6.547476] 25 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
[ 6.547478] 01 01 01 01 01 01 7c 2e 90 a0 60 1a 1e 40 30 20
[ 6.547480] 36 00 4b cf 10 00 00 18 00 00 00 01 00 06 10 30
[ 6.547482] 00 00 00 00 00 00 00 00 0a 20 00 00 00 fe 00 4c
[ 6.547484] 50 31 35 34 57 45 33 2d 54 4c 42 31 00 00 00 fe
[ 6.547486] 00 43 6f 6c 6f 72 20 4c 43 44 0a 20 20 20 00 dd
[ 6.547490] nouveau 0000:01:00.0: LVDS-1: EDID block 0 invalid.
[ 6.547493] nouveau E[ DRM] DDC responded, but no EDID for LVDS-1
[ 6.682213] nouveau [ DRM] allocated 1920x1080 fb: 0x70000, bo ffff88015e55b800

The line with "DDC responded, but no EDID for LVDS-1" repeats often.

Significant is that these long EDID reports only show up from the 29th onwards, as well as on the last boot of the 28th (boot before the problematic boot).

That last boot shows:

Dec 28 20:47:08 defiant kernel: [19803.436112] Raw EDID:
Dec 28 20:47:08 defiant kernel: [19803.436119] fb fb ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Dec 28 20:47:08 defiant kernel: [19803.436121] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Dec 28 20:47:08 defiant kernel: [19803.436122] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Dec 28 20:47:08 defiant kernel: [19803.436123] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Dec 28 20:47:08 defiant kernel: [19803.436124] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Dec 28 20:47:08 defiant kernel: [19803.436125] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Dec 28 20:47:08 defiant kernel: [19803.436126] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Dec 28 20:47:08 defiant kernel: [19803.436127] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Dec 28 20:47:08 defiant kernel: [19803.470773] Raw EDID:
Dec 28 20:47:08 defiant kernel: [19803.470781] 00 00 00 00 00 07 4f 00 06 10 bb 9c 00 00 00 00
Dec 28 20:47:08 defiant kernel: [19803.470783] 00 13 01 03 80 21 15 78 0a 50 c5 98 58 52 8e 27
Dec 28 20:47:08 defiant kernel: [19803.470784] 25 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
Dec 28 20:47:08 defiant kernel: [19803.470785] 01 01 01 01 01 01 7c 2e 90 a0 60 1a 1e 40 30 20
Dec 28 20:47:08 defiant kernel: [19803.470786] 36 00 4b cf 10 00 00 18 00 00 00 01 00 06 10 30
Dec 28 20:47:08 defiant kernel: [19803.470788] 00 00 00 00 00 00 00 00 0a 20 00 00 00 fe 00 4c
Dec 28 20:47:08 defiant kernel: [19803.470789] 50 31 35 34 57 45 33 2d 54 4c 42 31 00 00 00 fe
Dec 28 20:47:08 defiant kernel: [19803.470790] 00 43 6f 6c 6f 72 20 4c 43 44 0a 20 20 20 00 dd
Dec 28 20:47:08 defiant kernel: [19803.504839] Raw EDID:
Dec 28 20:47:08 defiant kernel: [19803.504847] 00 00 00 00 00 07 4f 00 06 10 bb 9c 00 00 00 00
Dec 28 20:47:08 defiant kernel: [19803.504848] 00 13 01 03 80 21 15 78 0a 50 c5 98 58 52 8e 27
Dec 28 20:47:08 defiant kernel: [19803.504849] 25 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
Dec 28 20:47:08 defiant kernel: [19803.504850] 01 01 01 01 01 01 7c 2e 90 a0 60 1a 1e 40 30 20
Dec 28 20:47:08 defiant kernel: [19803.504851] 36 00 4b cf 10 00 00 18 00 00 00 01 00 06 10 30
Dec 28 20:47:08 defiant kernel: [19803.504852] 00 00 00 00 00 00 00 00 0a 20 00 00 00 fe 00 4c
Dec 28 20:47:08 defiant kernel: [19803.504853] 50 31 35 34 57 45 33 2d 54 4c 42 31 00 00 00 fe
Dec 28 20:47:08 defiant kernel: [19803.504854] 00 43 6f 6c 6f 72 20 4c 43 44 0a 20 20 20 00 dd
Dec 28 20:47:08 defiant kernel: [19803.538901] Raw EDID:
Dec 28 20:47:08 defiant kernel: [19803.538909] 00 00 00 00 00 07 4f 00 06 10 bb 9c 00 00 00 00
Dec 28 20:47:08 defiant kernel: [19803.538910] 00 13 01 03 80 21 15 78 0a 50 c5 98 58 52 8e 27
Dec 28 20:47:08 defiant kernel: [19803.538911] 25 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
Dec 28 20:47:08 defiant kernel: [19803.538912] 01 01 01 01 01 01 7c 2e 90 a0 60 1a 1e 40 30 20
Dec 28 20:47:08 defiant kernel: [19803.538913] 36 00 4b cf 10 00 00 18 00 00 00 01 00 06 10 30
Dec 28 20:47:08 defiant kernel: [19803.538914] 00 00 00 00 00 00 00 00 0a 20 00 00 00 fe 00 4c
Dec 28 20:47:08 defiant kernel: [19803.538915] 50 31 35 34 57 45 33 2d 54 4c 42 31 00 00 00 fe
Dec 28 20:47:08 defiant kernel: [19803.538916] 00 43 6f 6c 6f 72 20 4c 43 44 0a 20 20 20 00 dd
Dec 28 20:47:08 defiant kernel: [19803.538921] nouveau 0000:01:00.0: LVDS-1: EDID block 0 invalid.
Dec 28 20:47:08 defiant kernel: [19803.538926] nouveau E[ DRM] DDC responded, but no EDID for LVDS-1


In earlier correct boots I regularly find:

Dec 24 12:37:49 defiant kernel: [ 7225.572415] [drm:drm_edid_block_valid] ERROR EDID checksum is invalid, remainder is 92
Dec 24 12:37:49 defiant kernel: [ 7225.572421] Raw EDID:
Dec 24 12:37:49 defiant kernel: [ 7225.572426] 00 ff ff ff ff ff ff 00 06 10 bb 9c 00 00 00 00
Dec 24 12:37:49 defiant kernel: [ 7225.572428] 00 13 01 03 80 21 15 78 0a 50 c5 98 58 52 8e 21
Dec 24 12:37:49 defiant kernel: [ 7225.572430] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Dec 24 12:37:49 defiant kernel: [ 7225.572433] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Dec 24 12:37:49 defiant kernel: [ 7225.572435] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Dec 24 12:37:49 defiant kernel: [ 7225.572437] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Dec 24 12:37:49 defiant kernel: [ 7225.572439] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Dec 24 12:37:49 defiant kernel: [ 7225.572441] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff


Dec 25 12:15:51 defiant kernel: [ 2707.066122] [drm:drm_edid_block_valid] ERROR EDID checksum is invalid, remainder is 255
Dec 25 12:15:51 defiant kernel: [ 2707.066129] Raw EDID:
Dec 25 12:15:51 defiant kernel: [ 2707.066133] 00 ff ff ff ff ff ff 00 06 10 bb 9c 00 00 00 00
Dec 25 12:15:51 defiant kernel: [ 2707.066136] 00 13 01 03 80 20 15 78 0a 50 c5 98 58 52 8e 27
Dec 25 12:15:51 defiant kernel: [ 2707.066138] 25 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
Dec 25 12:15:51 defiant kernel: [ 2707.066140] 01 01 01 01 01 01 7c 2e 90 a0 60 1a 1e 40 30 20
Dec 25 12:15:51 defiant kernel: [ 2707.066142] 36 00 4b cf 10 00 00 18 00 00 00 01 00 06 10 30
Dec 25 12:15:51 defiant kernel: [ 2707.066145] 00 00 00 00 00 00 00 00 0a 20 00 00 00 fe 00 4c
Dec 25 12:15:51 defiant kernel: [ 2707.066147] 50 31 35 34 57 45 33 2d 54 4c 42 31 00 00 00 fe
Dec 25 12:15:51 defiant kernel: [ 2707.066149] 00 43 6f 6c 6f 72 20 4c 43 44 0a 20 20 20 00 dd


As to the recommendation to try the latest updates, my mint system is up to date (slight updated after problem occurred). Versions:
xorg 1:7.7+1ubuntu4
xserver-xorg-video-nouveau 1:1.0.7+git20130516.bf72ae1f-0ubuntu0sarvattraring
libgl1-mesa-dri 9.2.0git20130627.15085b47-0ubuntu0sarvatt~raring
kernel 3.8.0-25-generic
As you can see, neither kernel nor nouveau are at the requested highest versions, but these do not seem easily available for my distro. With some pointers I can try them but am not sure what they would fix as corruption has already occurred.


I will now proceed and try to repair.