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Created attachment 548625 [details] xdpyinfo Description of problem: The latest kernel causes the screen to randomly go black while logged on in graphical, dual screen, high res. Both screens are affected. Version-Release number of selected component (if applicable): 3.1.5-6 How reproducible: Always Steps to Reproduce: 1. Log in on graphical screen 2. Use system with normal konsole windows, thunderbird, and konqueror 3. Move mouse and it recovers, but repeats. Actual results: Black screen Expected results: Visible screen Additional info: 3.1.5-2.fc16.x86_64 works fine. All updates that came out at the same time as 3.1.5-6 was released are applied, but since 5-2 seems to work with them, I assume it is kernel related. There are no messages that I can see that are relevant in messages, no WW/EE in Xorg.0.log save the usual falling back to old probe method for vesa/fbdev
Created attachment 548626 [details] lspci
Created attachment 548631 [details] messages This is a partial dump of the messages at boot. If I missed something strategic, let me know and I'll add it.
We ran hardware diagnostics on the box today and found a RAM chip failing that wasn't picked up by the standard BIOS diagnostics on boot. I'm not sure how 3.1.5-6 vs. 3.1.5-2 changed the access through memory which triggered the blacking, but since I've run 3.1.5-6 on nouveau today without apparent problems I'm closing the bug. Sorry for the inconvenience.