I have a very similar problem. When trying to boot Lucid post alpha 3, the
display shuts down after start of a boot, and turns on after a wile with
corrupted screen (desktop wallpaper mashed up with other colors), and I don't
hear the login sound, and can't see and use mouse or panels, icons.....
When booting with nomodeset=0 I can use the system with vesa loaded. The laptop
is Acer Extensa 5635G with Nvidia G 105M. This laptop has corrupted EDID. I
know that because I was having problem with Nvidia propertary driver which,
when used, divided my display to 6 little screens with resolution 640*480.
Nvidia guy's said that this was occurring because EDID was invalid and they
made workaround for this bug in last beta driver.
Here is the xrandr --verbose while in vesa:
Screen 0: minimum 640 x 480, current 1280 x 720, maximum 1280 x 720
default connected 1280x720+0+0 (0x108) normal (normal) 0mm x 0mm
Identifier: 0x107
Timestamp: 402760
Subpixel: unknown
Clones:
CRTC: 0
CRTCs: 0
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
1280x720 (0x108) 0.0MHz *current
h: width 1280 start 0 end 0 total 1280 skew 0 clock 0.0KHz
v: height 720 start 0 end 0 total 720 clock
0.0Hz
800x600 (0x109) 29.3MHz
h: width 800 start 0 end 0 total 800 skew 0 clock 36.6KHz
v: height 600 start 0 end 0 total 600 clock 61.0Hz
640x480 (0x10a) 18.4MHz
h: width 640 start 0 end 0 total 640 skew 0 clock 28.8KHz
v: height 480 start 0 end 0 total 480 clock 60.0Hz
In the attachment are files obtained while in vesa.
** Attachment added: "dmesgboot.txt"
http://launchpadlibrarian.net/41118835/dmesgboot.txt
--
[G72M] Screen corruption when using KMS. Dell Latitude D620 / Quadro NVS
110M/GeForce Go 7300
https://bugs.launchpad.net/bugs/539730
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