Arch Linux

John Wayne1

Member

Registered: 2015-10-02

Posts: 6

[Lenovo L450] No sound after undocking

Hi all,

since I moved from Gentoo to Arch I got one problem with my sound on Lenovo L450 and the Lenovo Docking Station:

Whenever I boot the notebook docked in everything works fine. But when I undock the notebook then there is no sound coming from the internal speakers. The only way to get some sound is plugging in some headphones directly to the audio jack - that works fine. Unplug them again and there will be silence. After a reboot outside of the dock the sound is working fine - plugging the notebook then in works and my external speakers (which are connected to the dock) are activated.

Conclusion: when I start my notebook undocked and plug in in the sound is working great - even after undocking again. There is only a problem when the notebook is started docked in In every case I can see the change from headphone to speaker using alsamixer - this seems to be working, even though there is no sound.

I already tried some usual workarounds with /etc/modprobe.d/alsa.conf (I got the last line from my gentoo installation, but tried the other ones, too):

#options snd-hda-intel model=lenovo-dock
#options snd-hda-intel model=thinkpad
#options snd-hda-intel id=PCH,HDMI index=0,1 model=lenovo-dock
options snd cards_limit=15

Using Gentoo undocking works fine after this kernel patch was applied - which is included with Archs' vanilla sources, too. I could not find any differences in my configuration (pulseaudio, module options...).

Thanks for any hint with this!

Detailed information

uname -a
Linux foo 4.2.2-1-ARCH #1 SMP PREEMPT

lspci -k|grep Audio -A3
00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09)
        Subsystem: Lenovo Device 503c
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel
--
00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition Audio Controller (rev 03)
        Subsystem: Lenovo Device 503c
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel

cat /proc/asound/cards
 0 [HDMI           ]: HDA-Intel - HDA Intel HDMI
                      HDA Intel HDMI at 0xe1230000 irq 50
 1 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xe1234000 irq 48

lsmod|grep snd
snd_hda_codec_hdmi     49152  1
snd_hda_codec_realtek    73728  1
snd_hda_codec_generic    69632  1 snd_hda_codec_realtek
snd_hda_intel          32768  7
snd_hda_codec         106496  4 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel
snd_hda_core           49152  5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
snd_hwdep              16384  1 snd_hda_codec
snd_pcm                86016  6 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_core
snd_timer              28672  1 snd_pcm
snd                    65536  21 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,thinkpad_acpi
soundcore              16384  1 snd

pacman -Q |grep pulse
libcanberra-pulse 0.30-5
libpulse 7.0-2
pulseaudio 7.0-2
pulseaudio-alsa 2-3
pulseaudio-bluetooth 7.0-2
pulseaudio-gconf 7.0-2

pacman -Q |grep alsa
alsa-lib 1.0.29-1
alsa-plugins 1.0.29-2
alsa-utils 1.0.29-2
lib32-alsa-lib 1.0.29-1
pulseaudio-alsa 2-3
zita-alsa-pcmi 0.2.0-2

John Wayne1

Member

Registered: 2015-10-02

Posts: 6

Re: [Lenovo L450] No sound after undocking

Nobody else with a docking station here? :-(