Check the temperature of the card too. Try and see if increasing the load on it can trigger the condition. Also compare the cards diagnostics in Linux and Windows. On Wednesday, 20 March 2013, Jason White wrote:
Trent W. Buck <trentbuck@gmail.com <javascript:;>> wrote:
Assuming there's nothing in Xorg.0.log either, I would next check xrandr's output to see what modelines it knows about. If you have a computer that works correctly with that monitor, or a monitor that works correctly with that computer, you should compare with its xrandr.
Thanks. My suspicion at the moment is that something isn't initialized properly: usually, the system boots fine and the monitor works; sometimes, the system boots apparently normally and the screen display is either unreadable or totally absent. A reboot is enough to fix it.
This phenomenon is very recent; I'm suspecting either a kernel upgrade (one of the Debian patches) or a developing hardware fault somewhere.
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