Peter, attached is the output of sudo ddcprobe.
I can't use read-edid on my 64-bit system. I extracted the EDID hex data from
Xorg.0.log, compiled my own parse-edid, and fed it into there. Here's what I
got:
# EDID version 1 revision 3
Section "Monitor"
# Block type: 2:0 3:ff
# Block type: 2:0 3:fd
# Block type: 2:0 3:fc
Identifier "VG2230wm"
VendorName "VSC"
ModelName "VG2230wm"
# Block type: 2:0 3:ff
# Block type: 2:0 3:fd
HorizSync 30-82
VertRefresh 50-75
# Max dot clock (video bandwidth) 170 MHz
# Block type: 2:0 3:fc
# DPMS capabilities: Active off:yes Suspend:no Standby:no
Mode "1680x1050" # vfreq 59.954Hz, hfreq 65.290kHz
DotClock 146.250000
HTimings 1680 1784 1960 2240
VTimings 1050 1053 1059 1089
Flags "+HSync" "-VSync"
EndMode
# Block type: 2:0 3:ff
# Block type: 2:0 3:fd
# Block type: 2:0 3:fc
EndSection
One more detail: The monitor does seem to support 1600x1200 mode. It's
pretty strange, but it shrinks the display down to 1680x1050 when I use
the mode. Everything gets blurry. When you boot from LiveCD, does Ubuntu
try to use the highest resolution available? I don't think that's very
wise.
The modes I end up deleting from xorg.conf (1680x1680, 1440x1440) seem
to fall under the category "ctiming" here. I bet the issue could be
solved by making Ubuntu ignore the "ctiming" modes, because they're
obviously wrong here. There are some legitimate "ctiming" modes, though.
I'm gonna find whatever's calculating those modes. Maybe somewhere,
there's a hidden assumption about the aspect ratio. This is a widescreen
16:10 monitor, and maybe some software can't handle that.
Thank you very, very much for responding. :)
** Attachment added: "Output of "sudo ddcprobe""
http://launchpadlibrarian.net/10088535/ddcprobe.txt
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Xorg resolution falling back to 640x480 and/or 800x600 when h/v freqs incorrect
https://bugs.launchpad.net/bugs/3731
You received this bug notification because you are a member of Kubuntu
Team, which is a subscriber of a duplicate bug.
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