I can confirm that this patch worked for me too (Toshiba Portege M400, graphics card 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03), 2.6.33-rc8-00113-gf8b55f2 running on Fedora 12).

Here is the a snippet of the dmesg output with the patch:

[    1.944430] [drm] set up 7M of stolen space
[    2.571575] [drm:edid_is_valid] *ERROR* Raw EDID:
[    2.571643] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    2.571646] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    2.571648] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    2.571668] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    2.571671] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    2.571673] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    2.571676] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    2.571678] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    2.571680] 
[    3.174390] [drm:edid_is_valid] *ERROR* Raw EDID:
[    3.174457] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.174459] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.174462] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.174464] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.174466] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.174486] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.174489] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.174491] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.174493] 
[    3.777037] [drm:edid_is_valid] *ERROR* Raw EDID:
[    3.777104] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.777107] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.777109] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.777111] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.777114] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.777134] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.777136] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.777138] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.777140] 
[    4.381295] [drm:edid_is_valid] *ERROR* Raw EDID:
[    4.381362] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    4.381364] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    4.381367] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    4.381369] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    4.381390] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    4.381392] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    4.381394] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    4.381397] <3>00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    4.381399] 
[    4.381459] i915 0000:00:02.0: LVDS-1: EDID invalid.
[    4.833944] [drm] initialized overlay support

Without the patch that message is printed over and over as the system is running. The strange thing is that this error only seems to happen when the laptop is booted from cold - it seemingly does not happen after reboots or booting a few minutes after the laptop has been switched off...

Tested-by: Sitsofe Wheeler <email address hidden>