My monitor is sort of finicky. Sometimes I run a program that cycles through resolutions and the monitor will refuse to give its EDID information for a few days:
(/var/log/Xorg.0.log) [ 239.653] (II) fglrx(0): Restoring Recent Mode via PCS is not supported in RANDR 1.2 capable environments [ 260.113] (II) fglrx(0): Cannot get EDID information for CRT1 [ 271.166] (II) fglrx(0): Cannot get EDID information for CRT1 (^ ran xrandr, this happens)
This causes the video card to think the maximum resolution it will support is 1600x1200, whereas I was running it at the optimal 1680x1050 that the monitor's manual says it supports.
xrandr doesn't even list that mode as supported.
Now, I am having this same problem again because I was experimenting with Wine which caused Xorg to crash and forced me to reboot.
Sometimes I figure out how to get it back (I have forgotten just how), and sometimes it corrects itself.
The first time this happened, I figured I had better make a backup of the binary EDID information using
read-edid, which I have saved in a 128-byte file on my hard drive. This leads me to my question:
How do you tell fglrx to read the EDID information from the file and not try to get it from the monitor?
I used to think this was the fault of the video card, but it's happening with a new video card (still fglrx drivers) as well, as well as new VGA cables.
The monitor is a Westinghouse LCM-22w3 plugged into the VGA port of the graphics card, an ATI Radeon HD 3200.
I've done some research into it, and apparently this is a somewhat common complaint of the LCM-22w3, but nobody seems to have any idea on how to solve the issue.
fglrx 8.92, xorg-server 1.9.5, kernel 188.8.131.52 x86_64 arch.