https://bugs.freedesktop.org/show_bug.cgi?id=94763
Bug ID: 94763
Summary: ALSA module: tsched=0 causes skipping on nVidia HDMI
output under QEMU-KVM
Product: PulseAudio
Version: unspecified
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: pavucontrol
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
CC: [email protected]
bool pa_alsa_may_tsched [modules/alsa/alsa-util.c] disables tsched if PA
determines that it is running within a VM.
This causes awful skipping audio on my system.
Removing the check enables the use of tsched and PA functions without a hitch.
Details
-------
Guest VM running under QEMU-KVM.
Arch Linux current 4.4.5-1-ARCH as of 2016/03/31
pulseaudio-git
commit 0f48b7c82378c32194b625d1fd886eee7f1e5928
Date: Sun Mar 13 23:56:54 2016 +0200
NVIDIA proprietary driver on nVidia GeForce 960GTX - using nVidia HDMI audio.
git blame appears to stem from 2009 - has support for tsched improved since
then?
53b046d5 src/modules/alsa/alsa-util.c (Lennart Poettering 2009-11-05 03:23:08
+0100 1482) /* We cannot depend on being woken up when we ask for in a
VM,
53b046d5 src/modules/alsa/alsa-util.c (Lennart Poettering 2009-11-05 03:23:08
+0100 1483) * so let's fallback to classic IO based playback then. */
I would go ahead and submit a pull request to disable this check but I'm unsure
of the ramifications across different virtualization solutions.
--
You are receiving this mail because:
You are the assignee for the bug.
You are the QA Contact for the bug._______________________________________________
pulseaudio-bugs mailing list
[email protected]
https://lists.freedesktop.org/mailman/listinfo/pulseaudio-bugs
