No sound with kernel 2.6.27

Question

After installing kernel 2.6.27 sound stopped working on my PC. Going back to 2.6.26 fixes it. It is a really strange problem, since music programs crashed as soon as I tried to play anything (tried mpd, audacious). Also, "cat /dev/urandom > /dev/dsp" gave me white noise, but it came like from "inside" my computer rather than my speakers. I have an integrated intel card (ICH5). If anyone else has this problem I'll report a bug.

Answer 1

APPEARS TO BE SOLVED see end of post
I have a chaintech av710 soundcard which uses the snd_ice1724 module. After upgrading to 2.7.27 I have no sound... The "blacklist snd-pcsp" fix didn't work for me (that module didn't get loaded anyway).
Things I have tried:
* Blacklist snd-pcsp
* Delete /etc/asound.state and reboot
* Add pci=nomsi to kernel command line and reboot
* Fiddle with controls in alsa-mixer and xfce4-mixer
* Stop alsa and try playing
* Install alsa-tools to get envy24control program, but that didn't load because it expects ice1714 and not ice1724
Funny thing is that now I have no sound at all, except for the little clicks and pops when various sound modules come online. However, after upgrading and rebooting for the first time, I could hear a TINY bit of sound, ie the volume was extremely low.
$ lsmod | grep snd
snd_seq_oss 31872 0
snd_seq_midi_event 8192 1 snd_seq_oss
snd_seq 49968 4 snd_seq_oss,snd_seq_midi_event
snd_pcm_oss 40192 0
snd_mixer_oss 16512 2 snd_pcm_oss
snd_ice1724 92092 5
snd_rawmidi 21504 1 snd_ice1724
snd_seq_device 8332 3 snd_seq_oss,snd_seq,snd_rawmidi
snd_ice17xx_ak4xxx 5120 1 snd_ice1724
snd_ac97_codec 100516 1 snd_ice1724
ac97_bus 3584 1 snd_ac97_codec
snd_ak4xxx_adda 9728 2 snd_ice1724,snd_ice17xx_ak4xxx
snd_ak4114 9984 1 snd_ice1724
snd_pcm 69636 5 snd_pcm_oss,snd_ice1724,snd_ac97_codec,snd_ak4114
snd_timer 21384 3 snd_seq,snd_pcm
snd_page_alloc 9224 1 snd_pcm
snd_pt2258 5504 1 snd_ice1724
snd_i2c 6400 2 snd_ice1724,snd_pt2258
snd 50724 20 snd_seq_oss,snd_seq,snd_pcm_oss,snd_mixer_oss,snd_ice1724,snd_rawmidi,snd_seq_device,snd_ac97_codec,snd_ak4xxx_adda,snd_ak4114,snd_pcm,snd_timer,snd_pt2258,snd_i2c
soundcore 8160 2 snd
$ lspci | grep audio
06:01.0 Multimedia audio controller: VIA Technologies Inc. VT1720/24 [Envy24PT/HT] PCI Multi-Channel Audio Controller (rev 01)
$ ls -al /proc/asound
total 0
dr-xr-xr-x 5 root root 0 2008-10-15 23:29 .
dr-xr-xr-x 101 root root 0 2008-10-15 23:15 ..
dr-xr-xr-x 6 root root 0 2008-10-15 23:31 card0
dr-xr-xr-x 2 root root 0 2008-10-15 23:31 oss
dr-xr-xr-x 2 root root 0 2008-10-15 23:31 seq
lrwxrwxrwx 1 root root 5 2008-10-15 23:31 AV710 -> card0
-r--r--r-- 1 root root 0 2008-10-15 23:31 cards
-r--r--r-- 1 root root 0 2008-10-15 23:31 devices
-r--r--r-- 1 root root 0 2008-10-15 23:31 modules
-r--r--r-- 1 root root 0 2008-10-15 23:31 pcm
-r--r--r-- 1 root root 0 2008-10-15 23:31 timers
-r--r--r-- 1 root root 0 2008-10-15 23:31 version
$ cat /proc/asound/cards
0 [AV710 ]: ICE1724 - Chaintech AV-710
Chaintech AV-710 at 0xec00, irq 17
Think I should file a bug report?
UPDATE
At some point I accidentally removed alsa-utils. With alsa stopped, I unloaded the snd_ice1724 module, then loaded it again with modprobe. The sound worked after I adjusted the "front" level, which was not previously neccesary. This isn't really a fix though because I had to get rid of ALSA...
UPDATE 2
I performed roughly these steps:
{as my user}
rm ~/.config/xfce4/mcs_settings/sound.xml [i think it was called sound.xml]
{as root}
/etc/rc.d/mpd stop
/etc/rc.d/alsa stop
rm /etc/asound.state
rmmod snd_ice1724
modprobe snd_ice1724
/etc/rc.d/alsa start
/etc/rc.d/mpd start
Then started alsamixer to adjust the controls.... And I have sound again. Rebooted, and mpd started playing automatically like it should.
In short I deleted all the sound configuration, I don't know exactly what did it. I think something has changed though because before it was not neccesary to adjust the "front" level to hear anything.
Last edited by Mashi (2008-10-16 04:12:54)