I have the same problem (HDA Intel ICH8, on a Zepto/Compal 3215W running the latest Hardy). Any application that try to access after Standby has no sound.

Linux z3215 2.6.24-12-generic #1 SMP Wed Mar 12 23:01:54 UTC 2008 i686 GNU/Linux

--- lsmod
snd_hda_intel         344088  3 
snd_pcm_oss            42144  0 
snd_mixer_oss          17920  1 snd_pcm_oss
snd_pcm                78596  2 snd_hda_intel,snd_pcm_oss
snd_page_alloc         11400  2 snd_hda_intel,snd_pcm
snd_hwdep              10500  1 snd_hda_intel
snd_seq_dummy           4868  0 
snd_seq_oss            35584  0 
snd_seq_midi            9376  0 
snd_rawmidi            25760  1 snd_seq_midi
snd_seq_midi_event      8320  2 snd_seq_oss,snd_seq_midi
snd_seq                54224  6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer              24836  2 snd_pcm,snd_seq
snd_seq_device          9612  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
snd                    56996  17 snd_hda_intel,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_hwdep,snd_seq_dummy,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore               8800  1 snd
---

--- /proc/interrupts
           CPU0       CPU1       
  0:    5484133    5219076   IO-APIC-edge      timer
  1:       5851       4104   IO-APIC-edge      i8042
  8:          5          6   IO-APIC-edge      rtc
  9:      11517      10596   IO-APIC-fasteoi   acpi
 12:       1631       1501   IO-APIC-edge      i8042
 14:     121090     109316   IO-APIC-edge      libata
 15:          0          0   IO-APIC-edge      libata
 17:    1456580    1337310   IO-APIC-fasteoi   uhci_hcd:usb3, i915@pci:0000:00:02.0
 18:     223785     199713   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb7
 19:          0          0   IO-APIC-fasteoi   uhci_hcd:usb6
 20:       8352       8288   IO-APIC-fasteoi   ehci_hcd:usb2, uhci_hcd:usb5, sdhci:slot0
 21:          0          0   IO-APIC-fasteoi   uhci_hcd:usb4
 22:          2          1   IO-APIC-fasteoi   ohci1394
 23:     237069     236344   IO-APIC-fasteoi   HDA Intel
215:    2908318    2936038   PCI-MSI-edge      eth0
216:     882463     828655   PCI-MSI-edge      iwl4965
217:     126577     117431   PCI-MSI-edge      ahci
NMI:          0          0   Non-maskable interrupts
LOC:    3160682    3283960   Local timer interrupts
RES:   10798376   10931036   Rescheduling interrupts
CAL:        198        200   function call interrupts
TLB:      18286      17569   TLB shootdowns
TRM:          0          0   Thermal event interrupts
SPU:          0          0   Spurious interrupts
ERR:          2
MIS:          0
---

--- lspci
00:1b.0 Audio device [0403]: Intel Corporation 82801H (ICH8 Family) HD Audio Controller [8086:284b] (rev 03)
	Subsystem: COMPAL Electronics Inc Unknown device [14c0:0026]
	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 23
	Region 0: Memory at f8400000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [50] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
		Address: 0000000000000000  Data: 0000
	Capabilities: [70] Express Unknown type IRQ 0
		Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag-
		Device: Latency L0s <64ns, L1 <1us
		Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported-
		Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+
		Device: MaxPayload 128 bytes, MaxReadReq 128 bytes
		Link: Supported Speed unknown, Width x0, ASPM unknown, Port 0
		Link: Latency L0s <64ns, L1 <1us
		Link: ASPM Disabled CommClk- ExtSynch-
		Link: Speed unknown, Width x0
---