i have exactly the same problem in hp 6710b. what's more interesting is
that with 2.6.22-9 (from gutsy-4 or -3) it worked fine.
my chip:
=> lspci -vvv | perl -ne 'print if /Audio/../^\s*$/'
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio
Controller (rev 03)
Subsystem: Hewlett-Packard Company Unknown device 30c0
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 16
Region 0: Memory at e4804000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
=> aplay -lL
default:CARD=Intel
HDA Intel, HDA Generic
Default Audio Device
front:CARD=Intel,DEV=0
HDA Intel, HDA Generic
Front speakers
surround40:CARD=Intel,DEV=0
HDA Intel, HDA Generic
4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
HDA Intel, HDA Generic
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
HDA Intel, HDA Generic
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
HDA Intel, HDA Generic
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
HDA Intel, HDA Generic
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Intel,DEV=0
HDA Intel
IEC958 (S/PDIF) Digital Audio Output
null
Discard all samples (playback) or generate zero samples (capture)
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: HDA Generic [HDA Generic]
Subdevices: 1/1
Subdevice #0: subdevice #0
--
no sound with Intel HDA 82801H (Gutsy Tribe 5, 2.6.22-10.30)
https://bugs.launchpad.net/bugs/134789
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