Latest update broke the sound.

[Wendell Nichols]

Wendell Nichols wrote:
> I installed an update after being offline for 3 weeks.  My machine is 
> a Thinkpad t61p and after the update sound does not work.  kmix will 
> not start and kde complains that the sound devices are not available.  
> The sound driver (snd_hda_intel) is loaded as are the other usual 
> suspects.
> Has anyone else had a similar problem?
> Wendell Nichols
>
>
> sound system info:
> [root at bilbo wcn00]# uname -a
> Linux bilbo 2.6.27.30-170.2.82.fc10.x86_64 #1 SMP Mon Aug 17 08:18:34 
> EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
>
> lspci -v
> 00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio 
> Controller (rev 03)
>        Subsystem: Lenovo ThinkPad 
> T61                                                         Flags: bus 
> master, fast devsel, latency 0, IRQ 17                               
>        Memory at fe220000 (64-bit, non-prefetchable) 
> [size=16K]                               Capabilities: [50] Power 
> Management version 2                                          
> Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ 
> Count=1/1 Enable-        Capabilities: [70] Express Root Complex 
> Integrated Endpoint, MSI 00                    Capabilities: [100] 
> Virtual Channel <?>                                                
> Capabilities: [130] Root Complex Link 
> <?>                                              Kernel driver in use: 
> HDA Intel                                                        
> Kernel modules: snd-hda-intel                       
> [root at bilbo wcn00]# lsmod |grep snd
> snd_hda_intel         480288  1
> snd_seq_dummy          11396  0
> snd_seq_oss            39232  0
> snd_seq_midi_event     14848  1 snd_seq_oss
> snd_seq                61968  5 
> snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
> snd_seq_device         15380  3 snd_seq_dummy,snd_seq_oss,snd_seq
> snd_pcm_oss            52352  0
> snd_mixer_oss          23168  2 snd_pcm_oss
> snd_pcm                85768  2 snd_hda_intel,snd_pcm_oss
> snd_timer              30352  2 snd_seq,snd_pcm
> snd_page_alloc         16656  2 snd_hda_intel,snd_pcm
> snd_hwdep              16392  1 snd_hda_intel
> snd                    68984  10 
> snd_hda_intel,snd_seq_dummy,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer,snd_hwdep 
>
> soundcore              14992  2 snd
>
>
More information:
I rebooted and noticed a popup dialog from arts:
Informational - artsmessage
Sound server informational message:
Error while initializing the sound driver:
device /dev/dsp can't be opened (Permission denied)
The sound server will continue, using the null output device.



I checked /dev/dsp /dev/mixer etc:
crw-rw---- 1 root root 14, 3 2009-09-14 09:51 /dev/dsp
crw-rw---- 1 root root 14, 0 2009-09-14 09:51 /dev/mixer

It doesn't help to change the permissions cause they get reset at boot 
time.  Most devices are owned exclusively by the system anyway.
wcn