high-frequency sound comes out of the speakers when playing audio

Thanks for taking the time to report this bug and helping to make Ubuntu better. Could you please add the output requested at https://help.ubuntu.com/community/DebuggingSoundProblems ? Thanks in advance.

/proc/asound/oss/sndstat

amixer

lspci -nv

asoundconf list

cat /etc/asound.conf ~/.asoundrc*

dmesg

cat /proc/interrupts

Please attach the contents of /proc/asound/card0/codec*

cat /proc/asound/card0/codec* > Desktop/bug8.txt

Also on a Samsung Q35 here so identical snd-hda chip whose settings should be auto-detected imho. Needless to say I had to appy the same "workaround" by editing /etc/modprobe.d/alsa-base in the same way as the original poster.

Also, this bug is marked as "needs info", though afaict all the needed info has been submitted. Let me know if you still need more info, I'm willing to help (make future ubuntu versions even better ;-)

This also applies to Gutsy for the Samsung Q35.

Beginning with the Hardy Heron 8.04 development cycle, all open Ubuntu kernel bugs need to be reported against the "linux" kernel package. We are automatically migrating this bug to the new "linux" package. However, development has already began for the upcoming Intrepid Ibex 8.10 release. It would be helpful if you could test the upcoming release and verify if this is still an issue - http://www.ubuntu.com/testing . If the issue still exists, please update this report by changing the Status of the "linux" task from "Incomplete" to "New". We appreciate your patience and understanding as we make this transition. Thanks!

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.

No longer a problem for me (Samsung Q35) - seems to be fixed on Intrepid - 2.6.27-7

Marking this Fix Released per the last comment. Sam since you are the original bug reporter, if this is not resolved for you with Intrepid, feel free to set the status back to "New". Thanks.