Takashi Iwai (2016-02-24 01:00 MST) wrote: > On Tue, 23 Feb 2016 21:02:17 +0100, > Derick Eddington wrote: >> >> Hi, first time here, following suggestion [1] to report non-working >> default configuration, which I found how to make work. >> >> I checked using the latest stable kernel 4.4.2 and my headset jack >> doesn't work by default but my fix does work, on Scientific Linux 7.2 >> using the 4.4.2 kernel from the ELRepo repository. I also checked using >> Ubuntu 16.04 alpha with its 4.4.0 kernel and the problem and fix are the >> same. >> >> My laptop is an HP EliteBook 755 G2 from mid 2015 [2] that has a >> combined headset (headphone + mic) jack that doesn't work by default. >> The speakers work fine by default and they mute when a headset is >> plugged in, but the headphones don't work. >> >> The snd-hda-intel module handles my device. >> The codec is Realtek ALC3228. >> I have the latest BIOS update from HP. >> >> I got it working by passing model=hp,headset-mic to snd-hda-intel. I >> found this fix in an alsa-user message about a different HP laptop with >> the same codec [3], but I had to modify the message's fix by only >> including the module option for model= and omitting the other options >> and aliases that seem to be specific to Arch Linux. I tried using only >> "hp" or only "headset-mic" as the value for model= but neither worked. > > The point is the comma. Your Realtek codec is assigned as the > secondary, and model option takes multiple values, one for each slot. > So, you'd need to pass "model=,headset-mic" > >> Attached are my outputs of alsa-info.sh from before and after I did >> model=hp,headset-mic. > > Thanks, I'll compare them. Isn't the any functionality lost by this > option? Everything (except for the noise issue) works by that? Passing only "model=,headset-mic" does work fine. I tested: internal speakers, internal mic, headset headphones, and headset mic, and they all work (after some mixer adjusting). (I haven't ever tried the first-slot HDMI/DP audio device but will try to some time.) >> Also, there's another problem after enabling model=hp,headset-mic, which >> I found how to fix: There is a very annoying squeaky background noise in >> the headphones that's independent of adjusting the volume level but it >> does stop when the headphones are muted. I tried a different headset >> and it's the same. I found how to suppress this by using the >> white_noise_fix.py script from [4] as described at [5,6], which >> apparently does some ioctl verbs to adjust the amp gain. I thought this >> might be something that should be fixed/adjusted in the kernel module(s) >> that handle this device, so that the white_noise_fix.py isn't needed. >> If so, maybe it's worth mentioning that when my laptop resumes from >> sleep, the background noise comes back, so I have to run >> white_noise_fix.py again. > > Such a noise often comes from the analog-loopback. Try to turn off > "Loopback Mixing" mixer switch. Disabling "Loopback Mixing" does stop the noise. (Be careful when toggling this with headphones on, loud pop noises can happen with my device.) The white_noise_fix.py script wasn't needed. Attached is my latest alsa-info.sh output from when it's all working with the above applied (and with other mixer settings that make everything usable for me). Thanks! -- Derick
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