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 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs