[hardy] microphone feedback during resume

[Rocko]

During resume, my laptop 'whines' for a second or two due to microphone feedback. It seems the microphone must get turned on with sensitivity set too high for this time. (It didn't do this in previous versions.)

Version info:

hardy beta 8.04

[Leann Ogasawara (leannogasawara)]

Hi Rocko,

Per the kernel team's bug policy, can you please attach the following information. Please be sure to attach each file as a separate attachment.

* cat /proc/version_signature > version.log
* dmesg > dmesg.log
* sudo lspci -vvnn > lspci-vvnn.log

It would also be good to wait to capture your dmesg output after you do a suspend/resume cycle.

For more information regarding the kernel team bug policy, please refer to https://wiki.ubuntu.com/KernelTeamBugPolicies . Thanks again and we appreciate your help and feedback.

[Rocko (rockorequin)]

The problem doesn't occur any more. It seems to have been fixed. Sorry for the bother!

[Rocko (rockorequin)]

It's doing it again regularly. It 'beeps' rapidly for around a second, but it sounds exactly like microphone feedback. Attached is the information requested, including dmesg after a suspend-resume cycle.

[Rocko (rockorequin)]

This occurs both on a Dell 8600 using 32-bit Hardy and on a Dell 1530 using 64-bit Hardy.

[Leann Ogasawara (leannogasawara)]

Hi Rocko,

Sorry for the extremely delayed response. Just to see if it makes a difference, care to test the upcoming Intrepid Ibex 8.10 kernel? It was most recently rebased with the upstream 2.6.25 kernel and is currently available in the following PPA:

https://edge.launchpad.net/~kernel-ppa/+archive

If you are not familiar with how to install packages from a PPA basically do the following . . .

Create the file /etc/apt/sources.list.d/kernel-ppa.list to include the following two lines:

deb http://ppa.launchpad.net/kernel-ppa/ubuntu hardy main
deb-src http://ppa.launchpad.net/kernel-ppa/ubuntu hardy main

Then run the command: sudo apt-get update

You should then be able to install the linux-image-2.6.25 kernel package. After you've finished testing you can remove the kernel-ppa.list file and run 'sudo apt-get update' once more. Please let us know your results. Thanks

[Rocko (rockorequin)]

I tried booting into the new kernel, but unfortunately suspend was missing from the list of options. Lots of other stuff was broken too (for instance: intermittent USB, no wireless LAN, no CPU frequency scaling, video resolution stuck at 800x600), so I've had to move back to the old kernel.

Any other suggestions?

[Leann Ogasawara (leannogasawara)]

The Ubuntu Kernel Team is planning to move to the 2.6.27 kernel for the upcoming Intrepid Ibex 8.10 release. As a result, the kernel team would appreciate it if you could please test this newer 2.6.27 Ubuntu kernel. There are one of two ways you should be able to test:

1) If you are comfortable installing packages on your own, the linux-image-2.6.27-* package is currently available for you to install and test.

--or--

2) The upcoming Alpha5 for Intrepid Ibex 8.10 will contain this newer 2.6.27 Ubuntu kernel. Alpha5 is set to be released Thursday Sept 4. Please watch http://www.ubuntu.com/testing for Alpha5 to be announced. You should then be able to test via a LiveCD.

Please let us know immediately if this newer 2.6.27 kernel resolves the bug reported here or if the issue remains. More importantly, please open a new bug report for each new bug/regression introduced by the 2.6.27 kernel and tag the bug report with 'linux-2.6.27'. Also, please specifically note if the issue does or does not appear in the 2.6.26 kernel. Thanks again, we really appreicate your help and feedback.

[Rocko (rockorequin)]

I've tried the latest kernels 2.6.27-2 and -3 in Intrepid, but haven't yet been able to resume successfully either from the live CD or from an installation.

The microphone hasn't given feedback 'whine' yet during my unsuccessful attempts at resuming from Intrepid, but then it doesn't always do so in Hardy any more either - it does maybe 50% of the time using 2.6.24-21-generic.

[Rocko (rockorequin)]

I've now done two successful suspend/resume cycles without any 'whine' from the speakers.

[Ryan Bair (dr.bair)]

Just another confirmation for Hardy. One is 32-bit on an IBM Thinkpad T42, the other is 64-bit on an Intel 945PSN with integrated Intel HDA.

[Rocko (rockorequin)]

I'm pretty sure this is fixed in the 2.6.27 kernels. 2.6.27-4 has been resuming a few times a day without feedback for a couple of weeks now.

[Leann Ogasawara (leannogasawara)]

Thanks for the feedback Rocko. Since you are the original bug reporter, I'm marking this "Fix Released" for Intrepid.