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

[Tanu Kaskinen]

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.

-- 
Tanu

https://www.patreon.com/tanuk