Same combination here, the problems is still there however... It seems somewhat caused by pulseaudio I think.
In fact, if once lightdm starts I go to tty1 → sudo service lighdm stop → sudo killall pulseaudio → echo OFF| sudo tee /sys/kernel/debug/vgaswitcheroo/switch #switch to integrated card Evertyhing will work since then... Otherwise I'm getting similar errors, still on 13.10: [ 489.177732] hda-intel 0000:01:00.1: Disabling via VGA-switcheroo [ 489.297129] hda-intel 0000:01:00.1: Cannot lock devices! [ 489.297139] radeon: switched off [ 489.300356] [drm] Disabling audio support [ 489.319552] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x000000000015e418 and cpu addr 0xffffc90009df0418 [ 489.973886] ACPI: \_SB_.PCI0: ACPI_NOTIFY_BUS_CHECK event: unsupported [ 489.973903] _handle_hotplug_event_root: Bus check notify on \_SB_.PCI0 [ 620.618515] systemd-udevd[11062]: NAME="autopilot-uinput" ignored, kernel device nodes can not be renamed; please fix it in /lib/udev/rules.d/61-autopilot-uinput.rules:2 [ 625.865633] type=1400 audit(1376040689.481:56): apparmor="STATUS" operation="profile_replace" parent=11322 profile="unconfined" name="/usr/lib/telepathy/mission-control-5" pid=11324 comm="apparmor_parser" [ 625.866080] type=1400 audit(1376040689.481:57): apparmor="STATUS" operation="profile_replace" parent=11322 profile="unconfined" name="/usr/lib/telepathy/telepathy-*" pid=11324 comm="apparmor_parser" [ 625.937081] type=1400 audit(1376040689.553:58): apparmor="STATUS" operation="profile_replace" parent=11322 profile="unconfined" name="pxgsettings" pid=11324 comm="apparmor_parser" [ 625.937705] type=1400 audit(1376040689.553:59): apparmor="STATUS" operation="profile_replace" parent=11322 profile="unconfined" name="sanitized_helper" pid=11324 comm="apparmor_parser" [ 625.937903] type=1400 audit(1376040689.553:60): apparmor="STATUS" operation="profile_load" parent=11322 profile="unconfined" name="/usr/lib/telepathy/telepathy-ofono" pid=11324 comm="apparmor_parser" [ 666.436776] compiz[3802]: segfault at 7fa0020c64b0 ip 00007f9ffe786c0d sp 00007fffdb31ce00 error 4 in libc-2.17.so[7f9ffe707000+1bc000] [ 678.992375] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 678.992453] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing CD0C (len 62, WS 0, PS 0) @ 0xCD28 [ 683.996303] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 683.996377] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing CD0C (len 62, WS 0, PS 0) @ 0xCD28 [ 683.996453] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing C3DC (len 871, WS 0, PS 0) @ 0xC439 [ 689.000275] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 689.000349] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing CD0C (len 62, WS 0, PS 0) @ 0xCD28 [ 694.004285] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 694.004363] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing CD0C (len 62, WS 0, PS 0) @ 0xCD28 [ 699.008330] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 699.008414] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing CD0C (len 62, WS 0, PS 0) @ 0xCD28 [ 699.514458] init: tty1 main process (2460) killed by QUIT signal [ 699.514489] init: tty1 main process ended, respawning [ 704.012405] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 704.012492] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing CD0C (len 62, WS 0, PS 0) @ 0xCD28 [ 709.016515] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 709.016596] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing CD0C (len 62, WS 0, PS 0) @ 0xCD28 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1162526 Title: vgaswitcheroo - Can't switch to dedicated GPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1162526/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
