dxs_support=3 works for me, but I have crashed the driver with it.
I have had no other problems, other than i cant play more than 1 stream on it or the second application will die, just not work, ect.
I think its the particular applications im using that are causing that issue. (quake3, teamspeak)
basically, this is the setup that works for me:
via onboard(card0), sblive(card1), tuner card. kernel 2.4.21
I use the sblive for teamspeak and run audio from quake on the via.
I have a cable from the output of the sblive to the input of the via and another cable from the tuner to the input on the sblive. makes volume control utterly interesting.
my conclusion with the via, is to not bother with it. I dont blame any of the alsa developers. I blame via for not helping.
also.. the OSS driver for me did the same thing. compression artifacts on the sound (I guess thats what they sound like)
alsa is the only thing that works close to perfect.
one day i will work up enough courage to try JUST the sblive.....
that day sint near. I have everything working, and it only took almost 9 months.
good luck.
David Engel wrote:
Hi,
I just got a Biostar M7VIQ motherboard and am having a hell of a time getting acceptable sound from the on-board Via 8235 sound with kernel 2.4.21 and ALSA 0.9.4. I found some useful information in ALSA-Configuration.txt (see below) but that didn't really help.
Note: on some SMP motherboards like MSI 694D the interrupts might not be generated properly. In such a case, please try to set the SMP (or MPS) version on BIOS to 1.1 instead of default value 1.4. Then the interrupt number will be assigned under 15. You might also upgrade your BIOS.
Setting MPS in the BIOS to 1.1 didn't help. I had to boot the kernel with "noapic" to get any interrupts from the sound chip. FWIW, the kernel OSS driver had the same problem.
I finally got some, albeit crappy, sound by unmuting and maxxing out everything with alsamixer. Strangely, the master volume control had no effect. It was the headphonoe control, along with PCM and VIA DXS, which controlled the output volume.
Note: VIA8233/5 (not VIA8233A) can support DXS (direct sound) channels as the first PCM. With this device, up to 4 streams can be played at the same time. If the playback on this PCM is noisy, try to specify dxs_channels option to 2 or 3. ^^^^^^^^ support???
To clean up the sound I was getting, I set dxs_support=2 to disable it, but then I couldn't get any sound at all. Using dxs_support=3 to lock the frequency at 48kHz, cleaned up the sound but locks up the driver if anything is played at other than 48kHz.
I am currently using the kernel OSS driver, which at least has clean sound. However, some of the applications I want to run require ALSA support so this isn't an acceptable, long-term solution.
Does anyone have any suggestions on what to try, or is the M7VIQ just a bad choice for on-board sound?
David
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