Comment 6 for bug 119944

Hi Matt,

Thanks for including all the xorg.conf and Xorg.0.log files! Those are helpful for ruling out several possibilities.

I notice in your xorg.conf that the monitor is listed as a generic. One thing you could try is to manually specify the hsync and vrefresh rates specific to your monitor in there. In theory, xorg should be able to autodetect those, but sometimes it can't. You can do this by changing your monitor section to look like this:

Section "Monitor"
 Identifier "Default"
 Option "DPMS"
        HorizSync 28-80
        VertRefresh 48-75
EndSection

But change the numbers to match the frequencies for your monitor. You can find these rates from your monitor manual (usually). If you don't have the manual handy, you can often find it on the manufacturer's website.

Based on your description of the problem (everything working ok seemingly, but the monitor blanking out) it sounds like a monitor issue. Since monitor detection is not 100%, and issues are fairly common, that's what makes me think the refresh rates may be mis-detected. Apologies if you've already checked this.