I have tested in different computers with AMD/ATI graphic cards and all has this bug.
Macbook Pro 8,2: 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Seymour [Radeon HD 6400M Series] iMac: 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI M56P [Radeon Mobility X1600] -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/979712 Title: AMD/ATI graphic cards sometimes produces weird black squares in screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/979712/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
