On Tue, Feb 18, 2014 at 10:22 AM, Robert Hancock hancockrwd@gmail.com wrote:
On Mon, Feb 17, 2014 at 8:13 PM, Raymond Yau superquad.vortex2@gmail.com wrote:
I have a HP ProDesk 600 G1 machine which seems to have some strange
behavior with the front headphone jack(s) running under Fedora 20 (running 3.13.2 kernel):
This machine has two front jacks: a headphone jack and a
microphone/headphone jack. When the headphones are plugged into the headphone jack, there's usually no change in the sound outputs list in the Sound control panel. The audio (mostly) works if the audio output device is set to Analog Output, but sometimes spuriously changes back to Speakers and the headphone output stops working (I suspect maybe from a spurious jack-sensing event, though I'm not certain). More confusingly, a couple of times I have gotten it into the state (through various fiddling with jacks and playing in the Sound control panel) where plugging into this jack is detected and causes the Headphone output to be selected in the control panel. I haven't been able to figure out consistently what causes this to happen.
If the headphone is plugged into the microphone/headphone jack, then
the control panel consistently switches to the Headphone output and consistently switches back the way it was when it's unplugged. However, there's no actual audio output coming out of that jack. (From some of the HP manuals, it sounds like with the Windows driver, when you plug into this jack, it's supposed to pop up a prompt asking you whether you want to use it as a microphone or headphones.)
The other strange thing is that intermittently, on the headphone jack
you'll start getting a bunch of loud static (clicking noises) and any actual audio playback becomes very faint and distorted.
I'm guessing perhaps something isn't being initialized/setup properly
in the codec, causing this kind of erratic behavior. The alsa-info output is uploaded at:
http://www.alsa-project.org/db/?f=594e837b7af07ffbe3473cf807465bc81a587880
I tried using hda-analyzer but it fails on this machine with:
ValueError: wrong proc file format (unknown dig1 bit 'KAE')
Any suggestions for things to try to debug this?
Node 0x14 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out Control: name="PCM Playback Switch", index=0, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=0 Control: name="Line Out Jack", index=0, device=0 Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1 Amp-Out vals: [0x00 0x00] Pincap 0x00010014: OUT EAPD Detect EAPD 0x2: EAPD Pin Default 0x01014020: [Jack] Line Out at Ext Rear Conn = 1/8, Color = Green DefAssociation = 0x2, Sequence = 0x0
it is a driver bug which assign PCM playback Switch to Line Out Jack
try the patch https://bugzilla.kernel.org/attachment.cgi?id=124971
With this patch, I get no audio output at all (totally silent on all ports). Even with playing around with alsamixer and muting/unmuting outputs I could not get anything coming out.
I've created a Bugzilla report here: