Comment 52 for bug 256142

I am experiencing this bug (I believe) on my laptop (i945 chipset). With framebuffer compression enabled, on average every twelve hours (but with a wide variance - sometimes it happens within an hour of rebooting, sometimes over a day), one or both displays is 'blanked' (actually not blanked, but set to displaying all pixels of a single color, usually black but occasionally grey or white or even another color).

For a long time I was running release 2.2.0 in clone mode on the internal display (LVDS) and an external display (VGA). The external display would be blanked, but never the internal display. I recently switched to git as of Sunday, and a side-by-side configuration (VGA right of LVDS). The two times the issue happened in this configuration before I disabled framebuffer compression, *both* displays were blanked.

As others have stated, neither restarting X nor fiddling with xrandr, disconnected and reconnecting the affected head etc can fix it - only a system restart.

Of note is that I did not see any display 'jitters', that I recall.

I will update to today's git, re-enable framebuffer compression, and see if the problem continues to occur...unless this is fixed in the driver, I'm recommending our X maintainer to disable framebuffer compression by default for the next Mandriva release (2008 Spring, due in April).