At Mon, 29 Dec 2014 13:51:36 +0100 (CET), Jan Engelhardt wrote:
I have a X240 (without any dock), and in Linux 3.17.4, I used to have
- "Speaker" with switch and volume bar (in alsamixer),
- "PCM" with switch and volume bar,
- the headphone output volume would be controlled by both Master and PCM.
With 3.18.1, bisected down to below commit, this all went bonkers.
- "Speaker" has only a switch but no volume bar,
Some volume remapping is an expected side-effect as some outputs share the same DAC.
- speakers do not output _any_ sound whatsoever anymore
Are you using PulseAudio or without? Try to check without PA at first. Don't forget to raise / unmute all relevant volumes via "alsamixer -c0" (or -c1), then test with "aplay -Dplughw foo.wav" (or aplay -Dplughw:1 foo.wav)
There has been a known issue in the recent openSUSE pulseaudio package, so this might be it. In that case, try to upgrade pulseaudio and related packages from OBS multimedia:libs repo (if not done yet).
- changing the PCM volume does not affect either Headphone or Speaker.
The "PCM" is now an alsa-lib softvol mixer item that isn't used by PA. This is likely no bug.
commit 7c21539c45eace48e9f6fbdd59347d8416960af5 Author: Lukas Bossard mr.bobukas@gmail.com Date: Wed Oct 29 18:31:07 2014 +0100
ALSA: hda - Add ultra dock support for Thinkpad X240. Adding ultra doch support for Lenovo Thinkpad X240 (17aa:2214). [Actually replaced the entry with ALC292_FIXUP_TPT440_DOCK -- tiwai]Reverting this commit on top of v3.18.1 restores the sought functionality.
In anyway, get alsa-info.sh outputs at the headphone plugged and unplugged on both 3.17.x and 3.18.x kernels. Run the script with --no-upload option and attach them.
Takashi