On a Thinkpad T400s, i can hear sound from the internal speakers. If I connect headphones to the respective jack though, they remain silent. This is the case with a 2.6.35 kernel, but worked fine using 2.6.34.
00:1b.0 Audio device : Intel Corporation 82801I (ICH9 Family) HD Audio Controller [8086:293e] (rev 03)
Subsystem: Lenovo Device [17aa:20f2]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin B routed to IRQ 47
Region 0: Memory at f2620000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: HDA Intel
Kernel modules: snd-hda-intel
Do you mean that the headphone is silent?
The speaker gets muted automatically when headphone jacks are plugged in. This is the designed behavior in the recent version.
Anyway, please run alsa-info.sh (with --no-upload option) before and after plugging the headphone, and give the outputs to bugzilla. (Please don't paste them to the form.)
A better question then comment 1 is: which headphone jack are you using? Is it the headphone jack of the machine itself or of the docking-station?
I'm using the headphone jack on the machine itself.
When I plug it it, the speakers of the machine go silent (which is fine, and by design), but the headphones remain silent.
Created attachment 29222 [details]
Output of alsa-info before pluggin in
Created attachment 29232 [details]
Output of alsa-info after plugging in
Try to pass model=thinkpad for snd-hda-intel module.
This was already fixed recently in sound git tree
Author: Takashi Iwai <firstname.lastname@example.org>
Date: Tue Sep 7 11:58:30 2010 +0200
ALSA: hda - Add quirk for Lenovo T400s
Passing that parameter seems to help. Will that change land in a 2.6.35 point release? Thanks!
The fix is in v220.127.116.11 . Thx.