[alsa-devel] [PATCH] ALSA: hda - Fix missing ELD info when using jackpoll_ms parameter

David Henningsson david.henningsson at canonical.com
Wed Dec 4 08:24:28 CET 2013

2013-12-04 15:17, Takashi Iwai skrev:
> At Wed,  4 Dec 2013 10:19:41 +0800,
> David Henningsson wrote:
>> In the case of using jackpoll_ms instead of unsol events, the jack
>> was correctly detected, but ELD info was not refreshed on plug-in.
>> And without ELD info, no proper restriction of pcm, which can in turn
>> break sound output on some devices.
>> Signed-off-by: David Henningsson <david.henningsson at canonical.com>
>> ---
>>   sound/pci/hda/patch_hdmi.c |   27 +++++++++++++++------------
>>   1 file changed, 15 insertions(+), 12 deletions(-)
>> @Takashi; feel free to add stable if you think it's worth it. (After all using
>> the jackpoll_ms parameter is not something we usually do.) It's still a bug fix
>> so sending to Linus tree should be okay, I believe.
> Hrm, I vaguely remember that I gave a very similar patch for testing,
> but it failed by some reason...

That indeed sounds vague. :-) At this point, is there anything required 
on my part to help getting this bug fixed? We run into it when we're 
backporting kernel features, i e, using graphics driver from one kernel 
version and hda driver from another kernel version... (and in this weird 
kernel mixup we haven't figured out why we don't get an interrupt, so as 
a workaround I'm using jackpoll_ms until we've figured that out.)

David Henningsson, Canonical Ltd.

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