Hi, I encountered the same problem since 2-3 weeks now.
My setup : - Ubuntu 14.04 LTS - Lenovo ThinkPad T420 + an additional Lenovo Screen ThinkVision (20") + Logitech Anywhere MX mouse I use the shortcut "Windows + L" (same as CTRL+ALT+L but less fingers are needed) to lock my laptop. I cannot reproduce the issue, but it happens every day. I have the same crash with Compiz (_usr_bin_compiz.1000.crash) I tried to update Unity package, but the crash hasn't been fixed. unity 7.2.5 + 14.04.20150 amd64 compiz 1:0.9.11.3 + 14.04. all -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1451613 Title: Unity/compiz crashes when locking screen To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1451613/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs