Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: pulseaudio (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1210470
Title:
Switching to integrated card with vgaswitcheroo makes the kernel to
hang, until pulseaudio is killed
Status in The Linux Kernel:
Confirmed
Status in “pulseaudio” package in Ubuntu:
Confirmed
Bug description:
I have a dual-GPU notebook, with a Intel Ironlake integrated GPU and a
AMD 5650m dedicated GPU (muxed system). The AMD gpu is also connected
to an HDMI port that implies an audio card (I'm running radeon module
with radeon.audio=1).
If I switch to the integrated card after that the UI is up and
pulseaudio is loaded, as soon as I exit from lightdm (both to reload X
or to shutdown the PC) the kernel hangs (both in 12.10, 13.04 and
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
[ 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
At the contrary, 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
Everything works well instead.
So it seems that pulseaudio should disable the powered-off card on
switch (or is this something that the kernel should do?).
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