[Bug 76559] screen corruption after going from VT to X

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76559

Fabio Pedretti <fabio.ped at libero.it> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|DRM/Radeon                  |General

--- Comment #3 from Fabio Pedretti <fabio.ped at libero.it> ---
This issue is still reproducible with Ubuntu 14.04 kernel (3.13.0-23.45),
before I was using 3.11.0-18.32 (Ubuntu 13.10 kernel).

This annoying issue is possibly not specific to radeon module. The following
dmesg ERROR is interesting and may be of help. Maybe it needs a monitor quirk?

[    3.398641] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid,
remainder is 58
[    3.398646] Raw EDID:
[    3.398652]      00 ff ff ff ff ff ff 00 06 10 56 9c 00 00 00 00
[    3.398656]      04 10 01 03 80 22 16 78 0a 87 f5 94 57 4f 8c 27
[    3.398660]      27 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
[    3.398664]      01 98 03 a2 01 01 9f 25 a0 40 51 84 0c 30 40 20
[    3.398669]      33 00 4b cf 10 00 00 19 00 00 00 01 00 06 10 30
[    3.398673]      00 00 00 00 00 00 00 00 0a 20 00 00 00 fe 00 4c
[    3.398677]      54 4e 31 35 34 58 37 00 00 00 0a 20 00 00 00 fc
[    3.398681]      00 43 6f 6c 6f 72 20 4c 43 44 0a 20 20 20 00 d5
[    3.427467] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid,
remainder is 58
[    3.427471] Raw EDID:
[    3.427475]      00 ff ff ff ff ff ff 00 06 10 56 9c 00 00 00 00
[    3.427479]      04 10 01 03 80 22 16 78 0a 87 f5 94 57 4f 8c 27
[    3.427483]      27 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
[    3.427487]      01 98 03 a2 01 01 9f 25 a0 40 51 84 0c 30 40 20
[    3.427491]      33 00 4b cf 10 00 00 19 00 00 00 01 00 06 10 30
[    3.427495]      00 00 00 00 00 00 00 00 0a 20 00 00 00 fe 00 4c
[    3.427499]      54 4e 31 35 34 58 37 00 00 00 0a 20 00 00 00 fc
[    3.427503]      00 43 6f 6c 6f 72 20 4c 43 44 0a 20 20 20 00 d5
[    3.456273] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid,
remainder is 58
[    3.456278] Raw EDID:
[    3.456283]      00 ff ff ff ff ff ff 00 06 10 56 9c 00 00 00 00
[    3.456287]      04 10 01 03 80 22 16 78 0a 87 f5 94 57 4f 8c 27
[    3.456292]      27 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
[    3.456296]      01 98 03 a2 01 01 9f 25 a0 40 51 84 0c 30 40 20
[    3.456300]      33 00 4b cf 10 00 00 19 00 00 00 01 00 06 10 30
[    3.456304]      00 00 00 00 00 00 00 00 0a 20 00 00 00 fe 00 4c
[    3.456308]      54 4e 31 35 34 58 37 00 00 00 0a 20 00 00 00 fc
[    3.456312]      00 43 6f 6c 6f 72 20 4c 43 44 0a 20 20 20 00 d5
[    3.484997] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid,
remainder is 58
[    3.485001] Raw EDID:
[    3.485005]      00 ff ff ff ff ff ff 00 06 10 56 9c 00 00 00 00
[    3.485009]      04 10 01 03 80 22 16 78 0a 87 f5 94 57 4f 8c 27
[    3.485013]      27 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
[    3.485017]      01 98 03 a2 01 01 9f 25 a0 40 51 84 0c 30 40 20
[    3.485021]      33 00 4b cf 10 00 00 19 00 00 00 01 00 06 10 30
[    3.485025]      00 00 00 00 00 00 00 00 0a 20 00 00 00 fe 00 4c
[    3.485029]      54 4e 31 35 34 58 37 00 00 00 0a 20 00 00 00 fc
[    3.485033]      00 43 6f 6c 6f 72 20 4c 43 44 0a 20 20 20 00 d5
[    3.485041] radeon 0000:01:00.0: LVDS-1: EDID block 0 invalid.

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