Comment 28 for bug 136810

This may help some Lenovo user :

with a laptop model : Lenovo 3000 C200 8922AZG

Using headphone, I was obliged to mute manually the speakers output (with gnome volume manager)

Adding this line in /etc/modprobe.d/alsa-base:

"options snd-hda-intel model=lenovo"

fixes the problem : when I plug headphones, speaker are automatically off
(the box headphone in the volume manager has to be checked whatever output you use)

Additionnal information of my current install :

$uname -a
Linux NEANT 2.6.22-14-generic #1 SMP Tue Feb 12 07:42:25 UTC 2008 i686 GNU/Linux

$cat /proc/asound/card0/codec#* | grep Codec
Codec: Realtek ALC861-VD
Codec: Generic 11c1 Si3054

$lspci -vvnn
00:1b.0 Audio device [0403]: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller [8086:27d8] (rev 02)
 Subsystem: Lenovo Lenovo 3000 C200 audio [Realtek ALC861VD] [17aa:3802]
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
 Latency: 0, Cache Line Size: 64 bytes
 Interrupt: pin A routed to IRQ 22
 Region 0: Memory at d0340000 (64-bit, non-prefetchable) [size=16K]
 Capabilities: [50] Power Management version 2
  Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  Status: D0 PME-Enable- DSel=0 DScale=0 PME-
 Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
  Address: 0000000000000000 Data: 0000
 Capabilities: [70] Express Unknown type IRQ 0
  Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag-
  Device: Latency L0s <64ns, L1 <1us
  Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported-
  Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+
  Device: MaxPayload 128 bytes, MaxReadReq 128 bytes
  Link: Supported Speed unknown, Width x0, ASPM unknown, Port 0
  Link: Latency L0s <64ns, L1 <1us
  Link: ASPM Disabled CommClk- ExtSynch-
  Link: Speed unknown, Width x0

Remark : with feisty, sound doesn't work out of the box, I was obliged to install manually the alsa drivers.