I have a very similar issue. Same ubuntu version 16.04, fresh install. Using Nvidia driver strange colours appear. Using xorg driver after clicking ubuntu search menu the system completely freezes. Must reboot after that. This is what I see in syslog (dossier /var/log) at time of issue:
May 1 19:17:33 aaa-desktop kernel: [ 2056.950500] nouveau 0000:01:00.0: compiz[1918]: fail ttm_validate May 1 19:17:33 aaa-desktop kernel: [ 2056.950508] nouveau 0000:01:00.0: compiz[1918]: validating bo list May 1 19:17:33 aaa-desktop kernel: [ 2056.950529] nouveau 0000:01:00.0: compiz[1918]: validate: -12 May 1 19:17:33 aaa-desktop kernel: [ 2057.344081] nouveau 0000:01:00.0: compiz[1918]: fail ttm_validate May 1 19:17:33 aaa-desktop kernel: [ 2057.344089] nouveau 0000:01:00.0: compiz[1918]: validating bo list May 1 19:17:33 aaa-desktop kernel: [ 2057.344106] nouveau 0000:01:00.0: compiz[1918]: validate: -12 \00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1828784 Title: nouveau driver display garbled after clicking ubuntu search menu button To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-edge/+bug/1828784/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
