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Old 09-23-2003, 12:05 PM   #1
LQ Newbie
Registered: Sep 2003
Distribution: Redhat 9
Posts: 1

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Sound latency too high


I've got a strange sound-problem under Redhat 9.0 (on an MSI K7 T Turbo Mainboard with VIA VT82C686B onboard sound) that i don't understand. First of all, I have sound in xmms, mplayer, xawtv etc., without problems. But if I use a game with "live" sound effects, like lbreakout2, there is a latency of more than one second between the action and the sound! If i start doom, the sound is also cutted very hard.
First I thought that this might be a problem of my sound drivers, so i switched from oss to alsa, then i changed my selfmade alsa drivers to the ones supported by via, but the result always was the same! (and, although i am a newbie, i assured that i used different drivers!) I modified buffer sizes in the control panel, too, without any results.
Is it possible that this is an IRQ conflict? I am not sure about what dmesg says - i cut some parts to show:

PCI: Found IRQ 11 for device 00:07.2
IRQ routing conflict for 00:07.2, have irq 9, want irq 11
IRQ routing conflict for 00:07.3, have irq 9, want irq 11
PCI: Sharing IRQ 11 with 00:0a.0
PCI: Sharing IRQ 11 with 00:0a.1
usb-uhci.c: USB UHCI at I/O 0xd400, IRQ 9
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected
PCI: Found IRQ 11 for device 00:07.3
IRQ routing conflict for 00:07.2, have irq 9, want irq 11
IRQ routing conflict for 00:07.3, have irq 9, want irq 11
PCI: Sharing IRQ 11 with 00:0a.0
PCI: Sharing IRQ 11 with 00:0a.1


PCI: Found IRQ 10 for device 00:0c.0
divert: allocating divert_blk for eth0
eth0: Davicom DM9102 at pci00:0c.0, 00:80:ad:79:39:6f, irq 10.
PCI: Assigned IRQ 11 for device 00:07.5
ac97_codec: AC97 Audio codec, id: ICE17 (ICE1232)
via_ac97_init: Not Turn on SPDIF:spdif=0,ExtReg=201
viaudio: board(VT3068) #1 at 0xDC00, IRQ 11


via_audio: ignoring drain playback error -11
via_audio: ignoring drain playback error -11

lspci tells me the following about my sound chip:
00:07.5 Multimedia audio controller: VIA Technologies, Inc. VT82C686 AC97 Audio Controller (rev 50)
Subsystem: Micro-Star International Co., Ltd.: Unknown device 3300
Flags: medium devsel, IRQ 11
I/O ports at dc00 [size=256]
I/O ports at e000 [size=4]
I/O ports at e400 [size=4]
Capabilities: [c0] Power Management version 2

Does anyone have an idea about whats going wrong here? I don't have any anymore... Thank you very much!


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