After some tests I can say it's compiz or nvidia blob. I have forced full scene repaints in CCSM for now.
** Also affects: compiz (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of DX Packages, which is subscribed to unity in Ubuntu. Matching subscriptions: dx-packages https://bugs.launchpad.net/bugs/1354023 Title: Screen contents are not being redrawn unless moving window off screen. Status in “compiz” package in Ubuntu: New Status in “unity” package in Ubuntu: New Bug description: Nvidia 340.24 Ubuntu 14.04.1 GTX 550Ti Let's say that I'm scrolling through web page in firefox. It's not redrawing so I have to drag window for it to redraw. Another example: I'm in Ubuntu Tweak, just toggled some stuff but it's not showing button change. I have to drag window off screen to properly redraw. Another example: Nautilus, I'm scrolling but it's not showing that it's scrolling. Again need to move window off screen and back to see changes. Another one: I'm writing right now and when I press Enter nothing happens, I have to press it again but cursor goes two rows down. Oh and now word "rows" is still in previous line with cursor so I have one ghost cursor and one in front. I think it's understandable now. I have this bug since 14.04 alpha, I though it's some dev crap and just made switch to Arch. Since 14.04.1 you have nice Vsync so I'm back. My guess: Someone at Cannonical tried to implement "reuse screen contents" from Kwin but failed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1354023/+subscriptions -- Mailing list: https://launchpad.net/~dx-packages Post to : dx-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~dx-packages More help : https://help.launchpad.net/ListHelp