Subject: [linux-audio-dev] problem with via82cxx sound driver
From: Can Ugur Ayfer (cayfer_AT_bilkent.edu.tr)
Date: Mon Dec 29 2003 - 00:16:45 EET
Hi All,
I've been having some weird problem with my new mainboard which has an
onboard VIA ac97 sound card
When I set everything for OSS drivers, xmms plays mp3 files like
a stuck record player. I can move around the music file but it gets
stuck in the first second.
When I try the piece of code I have written to use OSS techniques,
my simple program which is supposed to play an instrument file with
half a second of music recorded, the card plays the sound repeating it
indefinitely (until I abort the program).
The I switched to Alsa. When I use Alsa xmms plays fine but my piece of
code (unchanged, still using OSS calls) repeats the sample 32 times in 2
channels (stereo), 16 times in single channel (mono)
Linux is MDK 9.2. I tried the same things on a Dell notebook with
exactly the same Mandrake 9.2 (installed from the same network NFS
server) but ofcourse a different sound card, everything works fine.
Therefore it is certain that the problem is with the sound card driver.
From dmesg output:
--------------------------
Via 686a/8233/8235 audio driver 1.9.1-ac3
via82cxxx: Six channel audio available
PCI: Setting latency timer of device 00:11.5 to 64
ac97_codec: AC97 Audio codec, id: VIA97 (Unknown)
via82cxxx: board #1 at 0xE400, IRQ 18
--------------------------
From lsmod output
--------------------------
via82cxxx_audio 22112 0
ac97_codec 15828 0 [via82cxxx_audio]
uart401 8356 0 [via82cxxx_audio]
8139too 17384 1
mii 3864 0 [8139too]
sound 71528 0 [via82cxxx_audio uart401]
soundcore 6340 0 [snd via82cxxx_audio sound]
---------------------------
lspci output
--------------------------
00:00.0 Host bridge: VIA Technologies, Inc. P4M266 Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8633 [Apollo Pro266 AGP]
00:09.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)
00:10.0 USB Controller: VIA Technologies, Inc. USB (rev 80)
00:10.1 USB Controller: VIA Technologies, Inc. USB (rev 80)
00:10.2 USB Controller: VIA Technologies, Inc. USB (rev 80)
00:10.3 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 82)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8235 ISA Bridge
00:11.1 IDE interface: VIA Technologies, Inc.
VT82C586A/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE (rev 06)
00:11.5 Multimedia audio controller: VIA Technologies, Inc.
VT8233/A/8235 AC97 Audio Controller (rev 50)
01:00.0 VGA compatible controller: S3 Inc. VT8375 [ProSavage8 KM266/KL266]
------------------------------------
I shall appreciate any hints or help
best regards
Can Ugur Ayfer
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