I've got the same issues now on 15.04 after last updates (it was working well on 15.04 last week) uname -a
3.19.0-28-generic #30-Ubuntu SMP Mon Aug 31 15:52:51 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux sudo lspci -vnn | grep VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) and dmesg: Sep 9 14:38:13 kernel: [ 20.514832] compiz[4096]: segfault at b0 ip 00007f6ba417bb03 sp 00007fff74da4200 error 4 in libnux- graphics-4.0.so.0.7.0[7f6ba412e000+d1000] I must switch to gnome-shell to use my laptop -- You received this bug notification because you are a member of DX Packages, which is subscribed to nux in Ubuntu. Matching subscriptions: dx-packages https://bugs.launchpad.net/bugs/1311503 Title: compiz crashes with segfault error in libnux-graphics Status in nux package in Ubuntu: Confirmed Bug description: When I login compiz crashes with a segfault error in libnux-graphics. My screen turns blue (with nouveau driver) or with white blocks (nvidia current driver). In dmesg the following messages are shown: [ 808.965220] compiz[7568]: segfault at b0 ip 00007f9246244a0f sp 00007fff0a7a1450 error 4 in libnux-graphics-4.0.so.0.6.0[7f92461f8000+cb000] [ 813.851368] compiz[7722]: segfault at b0 ip 00007f34215bca0f sp 00007fffe2e356d0 error 4 in libnux-graphics-4.0.so.0.6.0[7f3421570000+cb000] I only get this error with my Nvidia GTX 460 card. I do not get these errors with my radeon and intel video cards (my other pc and laptop). All running latest Trusty 14.04. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nux/+bug/1311503/+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