Thanks for the backtrace. Before I triage this, would you mind attaching your /etc/X11/xorg.conf (if you have one). If you do have one, could you also try running without it? Please also run the following, and attach the resulting log file to this bug report:
"sudo lspci -vvnn > lspci.log" Thanks ** Changed in: xorg-server (Ubuntu) Sourcepackagename: xorg => xorg-server Importance: Undecided => Medium ** Summary changed: - gnome-system-monitor crashes x almost instantly + Xorg crashed with SIGSEGV in miValidateTree -- Xorg crashed with SIGSEGV in miValidateTree https://bugs.launchpad.net/bugs/274988 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs