Public bug reported: I'm running Ubuntu 13.10 (Saucy) on a MacbookPro9,1, which has both an Nvidia GeForce GT 650M and an integrated Intel HD Graphics 4000 controller. I boot with EFI and use the Nouveau driver.
On this machine logging out is slow, taking maybe 10 seconds or so. 'top' shows that the X server process uses lots of CPU during logout. I ran sysprof and it attributes much of the CPU time to nouveau_connector_detect, called via the following: system_call_fastpath [48.98%] sys_ioctl [41.90%] do_vfs_ioctl [41.87%] drm_ioctl [41.47%] drm_mode_getconnector [34.14%] drm_helper_probe_single_connector_modes [34.14%] nouveau_connector_detect [28.84%] nouveau_connector_detect_lvds [3.83%] intel_crt_detect [1.48%] The percentages above are of the total CPU time used in the shutdown sequence, so I think several seconds of time is being spent in the path above. That doesn't seem right. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Affects: xserver-xorg-video-nouveau (Ubuntu) Importance: Undecided Status: New ** Also affects: xserver-xorg-video-nouveau (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1191426 Title: logout is slow, profiling reveals lots of CPU time in nouveau_connector_detect To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1191426/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs