I have got the same problem in maverick. The mic channel does not appear
in alsamixer.
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no sound from microphone on HP Pavalion tx2640er (snd-hda-intel)
https://bugs.launchpad.net/bugs/617639
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@uve
I had the same problem with my tx2500z, but solved it by adding i8042.reset to
the boot options
Maybe you could try that? (my kernel is 2.6.28-15-generic)
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[Hewlett-Packard HP Pavilion tx2500 Notebook PC] suspend/resume failure
https://bugs.launchpad.net/bugs/359202
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