I expirienced similar problems. https://bugs.gentoo.org/show_bug.cgi?id=506188
pulseaudio hangs when it tryes to access switched off audio device. How I reproduced the problem: I started Gnome 3 session with disabled discrete GPU + HDMI audio. Disabled via vgaswitcheroo before session start. Switched on radeon GPU via vgaswitcheroo. Stopped pulseaudio daemon and launched it as foreground process with -vvv options. Launched sound applet from Gnome Control Center and verified that there is an HDMI Audio output device. Switched off radeon GPU via vgaswitcheroo. Tried to access switched off HDMI Audio by pressing 'Test Speakers' button. The outcome is not responding Sound applet and error messages from pulseaudio: D: [alsa-source-ALC271X Analog] ratelimit.c: 241 events suppressed D: [alsa-source-ALC271X Analog] memblock.c: Pool full W: [alsa-source-ALC271X Analog] asyncq.c: q overrun, queuing locally D: [alsa-source-ALC271X Analog] memblock.c: Pool full W: [alsa-source-ALC271X Analog] asyncq.c: q overrun, queuing locally D: [alsa-source-ALC271X Analog] memblock.c: Pool full W: [alsa-source-ALC271X Analog] asyncq.c: q overrun, queuing locally D: [alsa-source-ALC271X Analog] memblock.c: Pool full W: [alsa-source-ALC271X Analog] asyncq.c: q overrun, queuing locallyt D: [alsa-source-ALC271X Analog] memblock.c: Pool full W: [alsa-source-ALC271X Analog] asyncq.c: q overrun, queuing locally D: [alsa-source-ALC271X Analog] memblock.c: Pool full The pulseaudio process is not reacted to SIGTERM and SIGKILL. ** Bug watch added: Gentoo Bugzilla #506188 https://bugs.gentoo.org/show_bug.cgi?id=506188 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pulseaudio in Ubuntu. 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?). To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1210470/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
