Same problem here, didn't test powering with headphones either.
Laptop is Acer Aspire 7720G, used to work in linux mint 13 before last
update.
$ uname -a
Linux claw 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:41:14 UTC 2012 i686
i686 i386 GNU/Linux
lspci -v:
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio
Controller (rev 03)
Subsystem: Acer Incorporated [ALI] Device 011e
Flags: bus master, fast devsel, latency 0, IRQ 46
Memory at 98400000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd-hda-intel
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https://bugs.launchpad.net/bugs/995684
Title:
Switching problem between headphone speaker and microphone to laptop
built in speakers and front mic
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