Update:
single output -> works OK.
dual screen -> not OK.
I'll focus on dualscreen then.
when screensaver turns on it works for about a 60sec and I can get back to work
with no problems.
After that time only part of the second display is redrawn, looks like part
with y coordinate not covered by first display. So no movement on first screen
and no movement on upper part of second screen.
LVDS1 display 1 1680x1050
VGA1 display 2 1920x1200
so after event only lower 150 (1200 - 1050) pixels of second display are being
redrawn.
I had a luck and it didn't crash when moved mouse.
I ran xrandr --output VGA1 --off and strange thing happened. After clicking on
KDE menu it popped up, but some 150 pixels to high and wasn't all drawn. I ran
terminal program and my input wasn't shown until I moved it's wobbly window.
Also top 150 pixels of screen wasn't usable.
So: wobbly windows movement -> whole screen redraw shows my typed input
menu is to high and top of the screen not refreshing -> some coordinates
messed up
I managed to fix this situation by:
xrandr --output LVDS1 --off
yes it left me with no display at the moment
and then xrandr --output LVDS1 --auto
and all was back to normal.
Another observation, some time ago sync to vblank started to work for compiz
and even for dualscreen. But it seems broken now. When I move windows between
monitors I believe their
"covering crtc" isn't chosen correctly ie. it's allways 1 or allwas 2 regardles
of where the window is.
--
gl screensaver freeze mesa 7.6.0~git20090817.7c422387-0ubuntu2
https://bugs.launchpad.net/bugs/419291
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