I'm using CentOS 5.3 (which uses ALSA 1.0.17) and a Teradici KVM over IP extender - which has an hda_intel type sound chipset

However, when the snd_hda_intel module is loaded, dmesg reports:

PCI: Enabling device 0000:04:00.1 (0000 -> 0002) ACPI: PCI Interrupt 0000:04:00.1[A] -> GSI 16 (level, low) -> IRQ 177 PCI: Setting latency timer of device 0000:04:00.1 to 64 hda-intel: no codecs initialized ACPI: PCI interrupt for device 0000:04:00.1 disabled

... and /proc/asound/cards reports:

--- no soundcards ---

I've tried loading the snd-hda-intel module with various 'model=' options (including basic and auto), but it makes no difference

However, we also have CentOS 4.7 on machines with same Teradici card using ALSA 1.0.15 (that replaces the ALSA version that ships with CentOS 4) patched to support the Teradici card - using a patch based on the one that went into ALSA 1.0.17 to support the Teradici card. In this case the audio works - dmesg reports:

ACPI: PCI Interrupt 0000:82:00.1[A] -> GSI 47 (level, high) -> IRQ 233 PCI: Setting latency timer of device 0000:82:00.1 to 64 hda_codec: Unknown model for ALC883, trying auto-probe from BIOS...

And in this case, /proc/asound/cards reports:

0 [Teradici ]: HDA-Intel - HDA Teradici HDA Teradici at 0xd0100000 irq 233

and playback works fine.

Any idea why ALSA 1.0.17 doesn't work with the Teradici card?

I don't really want to replace the the ALSA kernel code with a more up to date version if at all possible ... is there a way of 'forcing' the 1.0.17 code 'to work' ?

lspci -vv for this card reports

04:00.1 Audio device: Teradici Corp. Unknown device 1200 Subsystem: Unknown device e49c:040b 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- Interrupt: pin A routed to IRQ 177 Region 0: Memory at fbbf8000 (64-bit, non-prefetchable) [disabled] [size=16K] Capabilities: [40] Power Management version 3 Flags: PMEClk- DSI- D1- D2+ AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Capabilities: [50] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable- Address: 0000000000000000 Data: 0000 Capabilities: [70] Express Endpoint IRQ 0 Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag- Device: Latency L0s <2us, L1 <8us Device: AtnBtn- AtnInd- PwrInd- Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported- Device: RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop- Device: MaxPayload 128 bytes, MaxReadReq 512 bytes Link: Supported Speed 2.5Gb/s, Width x1, ASPM L0s L1, Port 0 Link: Latency L0s <64ns, L1 <16us Link: ASPM Disabled RCB 64 bytes CommClk- ExtSynch- Link: Speed 2.5Gb/s, Width x1

aplay -l (using ALSA 1.0.15 on CentOS 4) reports

**** List of PLAYBACK Hardware Devices **** card 0: Teradici [HDA Teradici], device 0: ALC883 Analog [ALC883 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0

Thanks

James Pearson