Muting and unmuting Master channel when headphones are plugged in causes internal speaker to unmute on MacBook Pro

doesn't happen to me on June 2007 MacBook, with Hardy x86 edition. (although, after upgrading to Hardy, I had to use the workaround in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/201957 for any sound at all to come out of my headphones). Now, maybe it's different on your different configuration or when the Ubuntu is 64-bit. For me, even if no sound comes out of the headphones, if there are any plugged into the headphones jack then no sound comes out of the built-in speakers.

Thank you for taking the time to report this bug and helping to make Ubuntu better. You reported this bug a while ago and there hasn't been any activity in it recently. We were wondering is this still an issue for you? Can you try with latest Ubuntu release? Thanks in advance.

yes

Sorry but a simple 'yes' will not help us to help you. Also can you please refrain from Confirming your own bugs please.
Can you ellaborate. Is this still an issue for you and have you tried with latest Ubuntu release (Intrepid)?

Thank you.

Yes, in answer to both of your questions.

Hi Alexander,

Thank you for clarifying the above.
Can you please follow the instructions at both https://wiki.ubuntu.com/DebuggingGNOMEApplets and https://wiki.ubuntu.com/DebuggingSoundProblems and attach any output files as described as necessary to get this problem through the initial stages please.

Thank you.

alsamixer -c0

Selecting the master channel and pressing "m" to mute it and then unmute it has the same effect. It's an ALSA driver bug in snd-hda-intel.

Requested info not given - marking Incomplete.

Again, I ask you to refrain from changing the bug status. This cannot be set as Confirmed as per the Bug Squad policies which you can find at the relevant page at http://wiki.ubuntu.com - in regards to the problems you are having, can you please follow the instructions at both https://wiki.ubuntu.com/DebuggingGNOMEApplets and https://wiki.ubuntu.com/DebuggingSoundProblems and attach any output files as necessary, or this bug will stay as Incomplete. Failing that, we will have to mark it as Invalid, as the requested information is not being provided.
Also I remind you to please follow the code of conduct - http://www.ubuntu.com/community/conduct/ Thank you.

This is a bug in snd-hda-intel. Please drop the attitude.

Thank you for updating the description, and there is no attitude, there are just set procedures in place for triaging bugs, one of the main rules is only triagers change statuses :) I'll get the Importance changed for you. Thanks again!

Also, sorry 1 last thing, as per the Kernel Team policies, can you run the following to pull in all the required info to the bug report:

apport-collect -p linux-image-`uname -r` 212051

Thanks!

Architecture: amd64
DistroRelease: Ubuntu 9.04
HibernationDevice: RESUME=UUID=4ef22768-e599-468f-9b8f-130df6a985a0
MachineType: Apple Inc. MacBookPro3,1
NonfreeKernelModules: nvidia
Package: linux-image-2.6.28-11-generic 2.6.28-11.42
PackageArchitecture: amd64
ProcCmdLine: root=UUID=7d1e2f50-4756-49ea-94f5-22e91fe0d377 ro quiet splash
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_GB.UTF-8
ProcVersionSignature: Ubuntu 2.6.28-11.42-generic
Uname: Linux 2.6.28-11-generic x86_64
UserGroups: adm admin audio cdrom dialout dip floppy fuse kvm libvirtd lpadmin plugdev pulse-rt sambashare video

Thanks for the info. Marking as Confirmed and giving this to the developers, as there should now be enough info to get this debugging.

This bug was filed against a series that is no longer supported and so is being marked as Won't Fix. If this issue still exists in a supported series, please file a new bug.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.