http://bugs.freedesktop.org/show_bug.cgi?id=22852





--- Comment #3 from Arno Schuring <aelschur...@hotmail.com>  2009-08-06 
12:58:08 PST ---
Created an attachment (id=28406)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=28406)
dmesg with VGA-1 failing because of EDID errors

Could it be that somehow the two output clocks are coupled incorrectly? I have
updated my kernel about once a week since reporting, and today I got this in
dmesg (running -rc4 since last week):


[    0.841972] [drm:edid_is_valid] *ERROR* EDID checksum is invalid, remainder
is 185
[    0.842015] [drm:edid_is_valid] *ERROR* Raw EDID:
[    0.842051] <3>00 ff ff ff ff ff ff 00 26 cd ac 46 7a 2e 00 00 
........&..Fz...
[    0.842055] <3>31 0e 01 03 0e 22 1b 78 2a 2d 90 a4 57 4a 9c 25 
1....".x*-..WJ.%
[    0.842058] <3>11 50 54 bf ef 00 81 80 71 4f 01 01 01 01 01 01 
.PT.....qO......
[    0.842061] <3>01 01 01 01 01 01 bc 34 00 98 51 00 2a 40 10 90 
.......4.....@..
[    0.842064] <3>13 00 54 0e 11 00 00 1e 00 00 00 ff 00 30 35 33 
..T..........053
[    0.842067] <3>36 35 47 34 43 31 31 38 39 38 00 00 00 fd 00 37 
65G4C11898.....7
[    0.842071] <3>4b 18 53 0e 00 0a 20 20 20 20 20 20 00 00 00 fc  K.S...     
....
[    0.842074] <3>00 50 4c 45 34 33 31 0a 20 20 41 ff ff ff ff ff 
.PLE431.A.....
[    0.842076] 
[    0.842079] radeon 0000:01:00.0: VGA-1: EDID invalid.
[...]
[    1.043601] [drm] TMDS-8: set mode 1920x1080 1a
[    1.081245] Console: switching to colour frame buffer device 240x67

(EDID's last six bytes are corrupted)

But here's the kicker: now that the VGA port can't be setup because of wrong
EDID info, the DVI-0 that used to fail is actually working fine and showing
console at boot. Both screens still work correctly with the 6.12.2 driver, so
no change there.


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