T61/X3100/dock: DVI only works if VGA is connected
Posted: Fri Oct 12, 2007 2:02 pm
My T61 with X3100 running Kubuntu Feisty has been driving my 1920x1200 display via the Adv. Mini Dock DVI for months.
But when I moved the dock and LCD to a different location, I had trouble getting it to work again (even though I had no sw or config changes). The monitor was displaying a "signal out of range message". I rebooted a few times with the same result.
The only difference from the earlier set up was that I had had a VGA cable from the dock to the same LCD as well as the DVI (because of some initial issues getting video with the dock).
I added the VGA cable and the DVI now works!
Can anyone guess why?
I'd attach my xorg.conf and good and bad Xorg log files, but I don't see a mechanism...
tlc
But when I moved the dock and LCD to a different location, I had trouble getting it to work again (even though I had no sw or config changes). The monitor was displaying a "signal out of range message". I rebooted a few times with the same result.
The only difference from the earlier set up was that I had had a VGA cable from the dock to the same LCD as well as the DVI (because of some initial issues getting video with the dock).
I added the VGA cable and the DVI now works!
Can anyone guess why?
I'd attach my xorg.conf and good and bad Xorg log files, but I don't see a mechanism...
tlc