[pulseaudio-discuss] pulseaudio crash when unplugging hdmi while playing audio over hdmi on Cherry Trail devices

[Tanu Kaskinen]

On Fri, 2017-12-15 at 05:23 +0200, Tanu Kaskinen wrote:
> On Tue, 2017-12-12 at 11:39 +0100, Hans de Goede wrote:
> > Hi All,
> > 
> > First of all good news, with kernel 4.15-rc2 and alsa-lib 1.1.5
> > audio over hdmi works on Cherry Trail devices after selecting
> > the right output profile.
> > 
> > But when unplugging the hdmi cable pa dies. Running pa under
> > gdb says it gets killed with SIGKILL, so I think this is
> > another realtime issue where it gets killed by the kernel for
> > exceeding its CPU budget.
> > 
> > I've a log file of a run which ends with SIGKILL here:
> > https://fedorapeople.org/~jwrdegoede/pulseaudio-cht-hdmi.log
> > 
> > What stands out is a whole lot of errors / underruns after:
> > D: [pulseaudio] module-alsa-card.c: Jack 'HDMI/DP,pcm=1 Jack' is now unplugged
> > D: [pulseaudio] device-port.c: Setting port hdmi-output-1 to status no
> > 
> > So it seems that the problem is that pa still tries to use
> > the device after the unplug, even though it sees the unplug
> > before getting any errors.
> 
> PA keeps using the device, because the card has no better ports
> available. I think it would be good to switch to the off profile in
> this situation, but I think it would be more beneficial to finally fix
> that infinite loop. I'll try to make a patch for that.

Patches submitted:
https://patchwork.freedesktop.org/patch/195092/
https://patchwork.freedesktop.org/patch/195091/
https://patchwork.freedesktop.org/patch/195093/

-- 
Tanu

https://www.patreon.com/tanuk