As bug #281732 is now closed (see this last comment from Seth: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/281732/comments/82) and I still experience this issue, I am opening this bug.
Symptoms:
On Natty I can use the volume up/down buttons on my X200s and the correct thing happens. When I press the mute button, nothing happens.
According to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/281732/comments/43 that previous bug was closed in 2.6.31-10.31. I am running 2.6.38.10.25
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-10-generic 2.6.38-10.46
ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
Uname: Linux 2.6.38-10-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: greg 2155 F.... pulseaudio
/dev/snd/pcmC0D0p: greg 2155 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf2620000 irq 47'
Mixer name : 'Conexant CX20561 (Hermosa)'
Components : 'HDA:14f15051,17aa20ff,00100000'
Controls : 16
Simple ctrls : 8
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 7XHT24WW-1.06'
Mixer name : 'ThinkPad EC 7XHT24WW-1.06'
Components : ''
Controls : 1
Simple ctrls : 1
Card29.Amixer.values:
Simple mixer control 'Console',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [off]
CheckboxSubmission: 092f2439039e27e0f66d9a90ecbe6957
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
Date: Wed Jul 13 13:44:12 2011
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=0896c5b6-b39e-48c9-b2c8-6c20f281aa39
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100113)
MachineType: LENOVO 7465CTO
ProcEnviron:
LANGUAGE=en_US:en
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-10-generic root=UUID=6886f363-9f1c-4c1d-99da-273344848f40 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-2.6.38-10-generic N/A
linux-backports-modules-2.6.38-10-generic N/A
linux-firmware 1.52.1
SourcePackage: linux
UpgradeStatus: Upgraded to natty on 2011-05-29 (45 days ago)
dmi.bios.date: 11/10/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 6DET61WW (3.11 )
dmi.board.name: 7465CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr6DET61WW(3.11):bd11/10/2009:svnLENOVO:pn7465CTO:pvrThinkPadX200s:rvnLENOVO:rn7465CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 7465CTO
dmi.product.version: ThinkPad X200s
dmi.sys.vendor: LENOVO
The DMI quirk that was the fix for bug 281732 is not in place for the X200s. The DMI quirk should be a last resort though, so let's look for a better fix for the problem first.
First you should try the steps in the "Step-by-step troubleshooting" section of https:/
If you don't find any key events using that technique, try the following. Set your audio to be muted, then execute 'cat /proc/acpi/
Finally, run 'tail -f /var/log/kern.log', press the mute button, and see if you get any output in response. If you do, please report that output here.
Thanks!