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LFS is a project that provides you with the steps necessary to build your own custom Linux system.


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Old 04-11-2004, 06:18 PM   #1
Registered: Sep 2002
Location: Wichita Falls, TX
Distribution: tried a lot of 'em, now using kubuntu
Posts: 180

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BLFS - alsa - 2.6.5 kernel - no sound

I've finished LFS 5.0, and had a blast doing it!

I'm working my way through BLFS in hopes of one day getting rid of host distro entirely.

One problem. I upgraded to the 2.6.5 kernel, and everything works great except my sound (snd_intel8x0). Can't play mp3's in Xmms, and no sound in Xine. All of the modules loaded correctly:

denny@lfs ~ $ lsmod
Module Size Used by
sis_agp 5120 1
agpgart 28392 1 sis_agp
i2c_algo_pcf 6276 0
i2c_algo_bit 8840 0
it87 20108 0
i2c_sensor 2368 1 it87
i2c_isa 1664 0
i2c_sis96x 4356 0
i2c_dev 8640 0
i2c_core 19076 7 i2c_algo_pcf,i2c_algo_bit,it87,i2c_sensor,i2c_isa,i2c_sis96x,i2c_dev
snd_intel8x0 29380 0
snd_ac97_codec 61572 1 snd_intel8x0
snd_pcm 86820 1 snd_intel8x0
snd_timer 22468 1 snd_pcm
snd_page_alloc 9092 2 snd_intel8x0,snd_pcm
snd_mpu401_uart 6144 1 snd_intel8x0
snd_rawmidi 20960 1 snd_mpu401_uart
snd_seq_device 6792 1 snd_rawmidi
snd 48548 7 snd_intel8x0,snd_ac97_codec,snd_pcm,snd_timer,snd_mpu401_uart,snd_rawmidi,snd_seq_device
soundcore 7328 1 snd
sis900 17156 0
rtc 10680 0

I unmuted the sound channels using alsamixer. I know the card works, 'cause it works in Debian.

What else can I check?

Old 04-11-2004, 07:14 PM   #2
Andrew Benton
Senior Member
Registered: Aug 2003
Location: Birkenhead/Britain
Distribution: Linux From Scratch
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It may seem obvious but it's the only thing I can think of, did you change the permissions on /dev/dsp and /dev/mixer so that an ordinary user can use them?
chmod a+rw /dev/dsp /dev/mixer /dev/sequencer /dev/midi
Old 04-11-2004, 07:33 PM   #3
Registered: Sep 2002
Location: Wichita Falls, TX
Distribution: tried a lot of 'em, now using kubuntu
Posts: 180

Original Poster
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I had already chown'ed them to root:audio and made sure that I am a member of the audio group. I went ahead and did a chmod a+rw on all of those items. All of those are just links, I'm going to try chmod on the actual devices and see if that works. Changing the links didn't make a difference.

Thanks for the quick response, though.


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