Rob Kampen wrote:
Hi List, been chasing my tail for the last two hours and getting
nowhere on my wifes laptop.
I only do updates monthly on her machine, as it is safely behind
firewalls and only does email and browser stuff.
I have never had audio problems on this laptop, Centos just worked
from day one - even the wireless.
It appears that the 5.5 kernels and related audio driver snd-hda-intel
do not function.
If I reboot into 2.6.18-164.15.1.el5.centos.plus all is well.
$ cat /proc/asound/cards
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0x80000000 irq 169
1 [U0x46d0x804 ]: USB-Audio - USB Device 0x46d:0x804
USB Device 0x46d:0x804 at usb-0000:00:1d.7-3,
high speed
Neither 2.6.18-194.3.1.el5.centos.plus or
2.6.18-194.8.1.el5.centos.plus have functioning sound.
on these kernels I get
$ cat /proc/asound/cards
0 [U0x46d0x804 ]: USB-Audio - USB Device 0x46d:0x804
USB Device 0x46d:0x804 at usb-0000:00:1d.7-3,
high speed
yet lsmod shows
<snip>
snd_hda_intel 472337 0
snd_seq_dummy 7877 0
snd_seq_oss 32577 0
snd_seq_midi_event 11073 1 snd_seq_oss
snd_seq 49585 5
snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_pcm_oss 42817 0
snd_usb_audio 77761 2
snd_mixer_oss 19009 1 snd_pcm_oss
snd_pcm 72133 3 snd_hda_intel,snd_pcm_oss,snd_usb_audio
snd_usb_lib 19137 1 snd_usb_audio
snd_rawmidi 26561 1 snd_usb_lib
snd_timer 24517 2 snd_seq,snd_pcm
snd_page_alloc 14281 2 snd_hda_intel,snd_pcm
snd_seq_device 11725 4
snd_seq_dummy,snd_seq_oss,snd_seq,snd_rawmidi
snd_hwdep 12869 2 snd_hda_intel,snd_usb_audio
snd 55749 15
snd_hda_intel,snd_seq_oss,snd_seq,snd_pcm_oss,snd_usb_audio,snd_mixer_oss,snd_pcm,snd_rawmidi,snd_timer,snd_seq_device,snd_hwdep
soundcore 11553 1 snd
So I remembered the bug rh introduced with the 194 kernels and nvidia
chipsets (not my case but I'm desperate) and added the enable_msi=0 so
that my modprobe.conf is now
<snip>
options snd cards_limit=8
alias snd-card-0 snd-hda-intel
options snd-hda-intel index=0 enable_msi=0
but it still will not work.
<rant>
I am getting frustrated at the retrograde steps that seem to be
hitting kernel and 5.x upgrades lately.
yum update used to just work, get me the latest patches and all was
well - after all that is why I use Centos.
</rant>
I have tried modprobe -r to remove and reload module but to no avail.
Anyone have any ideas as to what I try next?
Google has not given me any ideas yet.
TIA
Still no joy - I am at a loss to know what to check - if I boot a 194
kernel no sound, 164 kernel is fine - why the regression?
Same configs, same modules loaded but now no sound - what can I check to
determine problem and find a solution?
no errors in logs or dmesg
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