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? ------------------------------------------------------------------------------ Android apps run on BlackBerry 10 Introducing the new BlackBerry 10.2.1 Runtime for Android apps. Now with support for Jelly Bean, Bluetooth, Mapview and more. Get your Android app in front of a whole new audience. Start now. http://pubads.g.doubleclick.net/gampad/clk?id=124407151&iu=/4140/ostg.clktrk _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
