I am also having similar problem. When doing alt+tab and maximize windows, the screen is flickering like anything. After sometime, it becomes more weird, the traces of older screen remains on top of current active screen.
Its difficult to explain, I managed to grab a video of the situation here: https://www.youtube.com/watch?v=d_zVI_yY6r0 Actions when it is happening: Any window maximize, ALT+ TAB, scroll in Mozilla I am using: Kubuntu 1.04 kde plasma 5.2.2 qt 5.4.1 kernel 3.19.0-15-generic os 64 bit ram 4gb processor AMD E1-6010 - AMD Radeon Graphics Dell Vostro 14 3000 series Kubuntu Fresh Install Date: May 25 , 2015 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1450228 Title: plasma screen flickering To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plasma-desktop/+bug/1450228/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
