I have the same basic problem. 2.6.8-2-k7: sound works, 2.6.11-1-k7, sound no workie.
My sounds stack looks like this under 2.6.8-2-k7:
snd_via82xx 29604 0
snd_ac97_codec 69508 1 snd_via82xx
snd_pcm_oss 54376 0
snd_mixer_oss 19904 1 snd_pcm_oss
snd_pcm 97480 2 snd_via82xx,snd_pcm_oss
snd_timer 25540 1 snd_pcm
snd_page_alloc 11720 2 snd_via82xx,snd_pcm
gameport 4736 1 snd_via82xx
snd_mpu401_uart 8000 1 snd_via82xx
snd_rawmidi 25316 1 snd_mpu401_uart
snd_seq_device 8264 1 snd_rawmidi
snd 57380 9 snd_via82xx,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer,snd_mpu401_uart,snd_rawmidi,snd_seq_device
soundcore 10400 1 snd
Under 2.6.11-1, it looked pretty much the same, except nothing worked..
After removing a USB sound device I had, mixers and stuff just reported no devices available.
Both kernels give me this banner in /var/log/messages:
Apr 19 14:02:02 canarsie kernel: Linux version 2.6.11-1-k7 ([EMAIL PROTECTED]) (gcc version 3.3.5 (Debian 1:3.3.5-8)) #1 Sun Apr 3 05:38:40 EDT 2005
[...]
Apr 19 14:02:02 canarsie kernel: via82xx: Assuming DXS channels with 48k fixed sample rate.
Apr 19 14:02:02 canarsie kernel: Please try dxs_support=1 or dxs_support=4 option
Apr 19 14:02:02 canarsie kernel: and report if it works on your machine.
Apr 19 14:02:02 canarsie kernel: ACPI: PCI Interrupt Link [ALKC] BIOS reported IRQ 0, using IRQ 22
Apr 19 14:02:02 canarsie kernel: ACPI: PCI Interrupt Link [ALKC] enabled at IRQ
22
Apr 19 14:02:02 canarsie kernel: ACPI: PCI interrupt 0000:00:11.5[C] -> GSI 22 (level, low) -> IRQ 193
Apr 19 14:02:02 canarsie kernel: PCI: Setting latency timer of device 0000:00:11.5 to 64
[fiddling, loading and unloading sound stuff...]
Apr 19 15:23:43 canarsie kernel: via82xx: Assuming DXS channels with 48k fixed sample rate.
Apr 19 15:23:43 canarsie kernel: Please try dxs_support=1 or dxs_support=4 option
Apr 19 15:23:43 canarsie kernel: and report if it works on your machine.
Apr 19 15:23:43 canarsie kernel: ACPI: PCI interrupt 0000:00:11.5[C] -> GSI 22 (level, low) -> IRQ 193
Apr 19 15:23:43 canarsie kernel: PCI: Setting latency timer of device 0000:00:11.5 to 64
Apr 19 15:41:00 canarsie kernel: Linux version 2.6.8-2-k7 ([EMAIL PROTECTED]) (gcc
version 3.3.5 (Debian 1:3.3.5-8)) #1 Tue Mar 22 14:14:00 EST 2005
[...]
Apr 19 15:41:00 canarsie kernel: via82xx: Assuming DXS channels with 48k fixed sample rate.
Apr 19 15:41:00 canarsie kernel: Please try dxs_support=1 or dxs_support=4 option
Apr 19 15:41:00 canarsie kernel: and report if it works on your machine.
Apr 19 15:41:00 canarsie kernel: ACPI: PCI interrupt 0000:00:11.5[C] -> GSI 22 (level, low) -> IRQ 193
Apr 19 15:41:00 canarsie kernel: PCI: Setting latency timer of device 0000:00:11.5 to 64
Not sure what I should try to diagnose this [although, this is my workstation, so I can't reboot it all day..]
( I was hoping to find a solution to http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=278629)
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