We're closing this bug since it is has been some time with no response
from the original bug reporter. However, if the issue still exists in
the latest development version of Ubuntu and you are the original
reporter please feel free to reopen with the requested information. If
you are not the original reporter, please don't reopen this one but
instead file a new bug and reference this one.
** Changed in: xorg (Ubuntu)
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/1047156
Title:
EDID does not allow LCD widescreen configuration
Status in “xorg” package in Ubuntu:
Invalid
Bug description:
Ubuntu has new strict EDID guidelines that does not allow LCD
widescreen configuration.
Symptoms:
Constant flickering on and off of screen content, including distortion
similar to a bad tv reception.
The screen is a LCD Citizen C19604HD that should run 1440x 900 at 60
Hz (as per manual), which apparently does not have proper EDID. I
should note this setup had no problems prior, until tty1 started to
complain about a bad EDID checksum during 12.10 beta.
Fix:
Attempting to set my own xorg.conf evoked a message about running in low
graphics mode. It asked if I wanted to (re)configure. I confirmed, after which
I no longer needed xorg,conf, nor presumably Option "IgnoreEDID"
"on" in xorg.conf which made xorg sessions usable.
What should happen
The system should be self-healing. The user should not have to grapple with
xorg.conf (for hours or days on end with unfamiliar concepts [EDID] and
work-arounds), and even less after all that time and effort just to have the
system say, "Hey, I don't like what you're doing. Here, let me do it.". This
(self-repair) hook should be invoked sooner in the trouble shooting process.
See related problem about
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1047146
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