Bug 76559

Created attachment 96296 [details]
dmesg

Created attachment 96297 [details]
Xorg log after the corruption has been reproduced (X -> VT -> X) and restored changing resolution

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.

Created attachment 118045 [details]
dmesg with 3.19.0-26-generic

Any news on this issue?
It is still reproducible with Ubuntu 15.04 kernel:
Linux fabio-mac 3.19.0-26-generic #28-Ubuntu SMP Tue Aug 11 14:16:45 UTC 2015 i686 i686 i686 GNU/Linux

Attached updated dmesg.

Let me know if something other is needed.

this seems suspect:
[   61.916143] ------------[ cut here ]------------
[   61.916157] WARNING: CPU: 0 PID: 31 at /build/linux-eVPZfP/linux-3.19.0/arch/x86/kernel/check.c:140 check_for_bios_corruption+0x8d/0xd0()
[   61.916161] Memory corruption detected in low memory

Maybe some Mac firmware issue?

Created attachment 118051 [details]
dmesg with 3.19.0-26-generic

> Maybe some Mac firmware issue?

Possibly, but I think that may not be related, as that doesn’t always happen and maybe be a different issue.

I attach a different dmesg where the crash doesn't happen, but the corruption problem is still present.

Hi,

Freedesktop's Bugzilla instance is EOLed and open bugs are about to be migrated to http://gitlab.freedesktop.org.

To avoid migrating out of date bugs, I am now closing all the bugs that did not see any activity in the past year. If the issue is still happening, please create a new bug in the relevant project at https://gitlab.freedesktop.org/drm (use misc by default).

Sorry about the noise!