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i810 audio didn't work for me with kernel 2.4.9 (artsd from KDE goes into infinite loop, no sound). 

Reverting to kernel 2.4.7 or replacing in 2.4.9 drivers/sound/ac97_codec.c, drivers/sound/i810_audio.c,
include/linux/ac97_codec.h from 2.4.8-ac8 fixed the problem for me

Andris

small fragment of strace output from artsd (not modified 2.4.9):

09:22:28.328650 select(9, [4 6], [8], [6 8], {0, 119135}) = 1 (out [8], left {0, 120000})
09:22:28.328935 ioctl(8, SNDCTL_DSP_GETOSPACE, 0xbffff5ec) = 0
09:22:28.328984 write(8, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 608) = 96
09:22:28.329071 gettimeofday({998374948, 329087}, NULL) = 0
09:22:28.329116 gettimeofday({998374948, 329132}, NULL) = 0
09:22:28.329161 select(9, [4 6], [8], [6 8], {0, 118624}) = 1 (out [8], left {0, 120000})
09:22:28.329401 ioctl(8, SNDCTL_DSP_GETOSPACE, 0xbffff5ec) = 0
09:22:28.329450 write(8, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 592) = 80
09:22:28.329537 gettimeofday({998374948, 329553}, NULL) = 0
09:22:28.329582 gettimeofday({998374948, 329599}, NULL) = 0
09:22:28.329628 select(9, [4 6], [8], [6 8], {0, 118157}) = 1 (out [8], left {0, 120000})
09:22:28.329912 ioctl(8, SNDCTL_DSP_GETOSPACE, 0xbffff5ec) = 0
09:22:28.329964 write(8, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 608) = 96
09:22:28.330051 gettimeofday({998374948, 330067}, NULL) = 0
09:22:28.330096 gettimeofday({998374948, 330113}, NULL) = 0
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