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Headphones no longer work after Fedora 18 upgrade

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I've got an HP Pavilion DV7 with an integrated Intel soundcard. Worked out of the box on F17, but F18 seems to not redirect the sound properly once headphones are plugged in.

HW Info

Code:

00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
        Subsystem: Hewlett-Packard Company Device 165b
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 50
        Region 0: Memory at c6500000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: snd_hda_intel

Module is loaded
Code:

$ lsmod|grep snd
snd_hda_codec_hdmi    36748  1
snd_hda_codec_idt      70256  1
snd_hda_intel          43715  5
snd_hda_codec        132514  3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
snd_hwdep              17650  1 snd_hda_codec
snd_pcm                98004  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
snd_page_alloc        18268  2 snd_pcm,snd_hda_intel
snd_timer              28690  1 snd_pcm
snd                    79379  16 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_idt,snd_pcm,snd_hda_codec,snd_hda_intel
soundcore              14491  1 snd

It looks like the system does recognize when the headphones are plugged in, but sound is still silent. In audio settings for gnome3, the "Choose a device for sound output" selector will switch from: "Headphones - Built-in Audio" to "Speakers - Built-in Audio" when I plug/unplug the headpones

I've also played around with different module settings, but can't seem to get the right magic:

Code:

$ cat /etc/modprobe.d/dist-alsa.conf
options snd-hda-intel model=dell-m6-amic
options snd-hda-intel enable_msi=1

I'm back to a plain snd-hda-intel module with no options manually specified, but I'm still without sound.

Any suggestions?

Thanks in advance!

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