https://bugs.freedesktop.org/show_bug.cgi?id=31058
--- Comment #1 from Pekka Paalanen <[email protected]> 2010-10-22 15:23:40 PDT --- This is probably an irrelevant comment, but... You seem to have Samsung SyncMaster 204B monitor, which has two known typical faults: dying chinese electrolyte capacitors, and instability at the monitor's own recommended mode of 1600x1200 60 Hz. Your symptoms, though, do not fit either of these, but I tought you'd like to know. I have personally fixed one of these monitors. The only fix for capacitors is replacing them. The display mode problem, however, is more interesting. The standard (and the one the monitor EDID advertises) 1600x1200 mode uses 162 MHz pixel clock, which the monitor can only barely accept. Symptoms of mode failure are image blackouts, and white or green "snowing" (fast moving random bright pixels). Severity depends on the screen contents. The fix for the mode failure is easy: use 1600x1200 60 Hz reduced blanking mode. Its pixel clock is low enough (130-something MHz) for the monitor to be stable. That is my personal experience. If you want to stress-test your monitor, make it show this image: http://koti.mbnet.fi/inventor/download/kuvia/raster.gif In the 162 MHz mode, my monitor simply refuses to show anything, or misbehaves badly. On reduced blanking mode, it works like a charm. I would recommend the reduced blanking mode regardless if my explanation has anything to do with your actual problem. When you test different resolutions and display modes, check the monitor's on-screen display for the mode size and frequencies. I do not remember the default on Nouveau, but we may be feeding a 1600x1200 mode regardless of the resolution you have selected (GPU rescaling), even on VGA text mode(!). Cheers. -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. _______________________________________________ Nouveau mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/nouveau
