https://bugzilla.kernel.org/show_bug.cgi?id=42787
Summary: Video flickers on X1200 / RS690 over DVI Product: Drivers Version: 2.5 Kernel Version: 3.0.0 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) AssignedTo: drivers_video-dri@kernel-bugs.osdl.org ReportedBy: stephan.diestelhorst@gmail.com Regression: No
I still experience flickering on the DVI of my on-board graphics card if I set the mode to 1920x180 (ragrdless which timing 59.9 / 60 Hz). Tried both KMS / UMS, no real difference. AFAICS, all pathes in other bug reports should be picked up by now. It seems that graphics activity (moving a translucent window) is more prone to blanking the display.
Killing upowerd does not help, so it is not a polling issue. CPU is is not properly detected by the BIOS (too old, no upgrade available), so it may (?) be that some registers (MTRRs?) are not set up properly.
Reducing the resolution does seem to help.