is anyone can help? I have a problem with sound on my pc. It did work at first, but when after I rebooted it doesnt. system-config-soundcard still shows that detected soundcard is VT8233/A/8235/8237 AC 97. However, when I try sound test, I hear nothing. Also, no PCM devices are present in this dialog box. I use fedora core 6. The output of lspci:

[root@winlin ~]# lspci
00:00.0 Host bridge: VIA Technologies, Inc. VT8377 [KT400/KT600 AGP] Host Bridge (rev 80)
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
00:06.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host Controller ( rev 46)
00:0f.0 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/ C PIPC Bus Master IDE (rev 06)
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge [KT600/K8T800/K8T89 0 South]
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 A C97 Audio Controller (rev 60)
00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 78)
01:00.0 VGA compatible controller: nVidia Corporation NV36 [GeForce FX 5700LE] ( rev a1)

[root@winlin ~]# uname -rm
2.6.18-1.2868.fc6 i686

alsa drivers are present at system-config-soundcard. the version of alsa is 1.0.12-2
anyone, help!

anybody? come on guys

I'm running OpenSuse 10.2 and I also have what appears to be the same problem. In my case the sound card installer (a part of YaST) gave me the message:

Sound was working for me until recently, so I suspect that some slightly botched kernel update is the villain here. I will admit that I have not tracked all the revisions to my system introduced by online updates, so I can't tell what change induced the error.

The net effect is that sound doesn't work at all.

I dont have this issue anymore... I mean I do but I have a solution. If you can call that solution
I found out that sound sometimes would work after reboot. sometimes it wouldnt. Whenever I reboot and I have sound, I dont turn off my PC anymore So thats my solution. I dont know if you have the same thing but try rebooting your PC.
By the way, another interesting thing. I had kind of the same issue with my printer. Sometimes it wouldnt work, sometimes it would. If it would work after reboot, I wouldnt turn of my PC Another great solution. That's what I would get from dmesg if it wouldnt work:

usb 1-2: new full speed USB device using uhci_hcd and address 5
usb 1-2: new full speed USB device using uhci_hcd and address 6
usb 1-2: configuration #1 chosen from 1 choice
drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 6 if 1 alt 0 proto 2 vid 0x03F0 pid 0x4D11
usb 1-2: USB disconnect, address 6
drivers/usb/class/usblp.c: usblp0: removed

It seems that rebooting is a cure for all diseases...

I've encountered this problem on every reboot.

I just updated ALSA from version 1.0.10 to version 1.0.13 and -- miracle of miracles -- my sound is working again.

I've read that new alsa might help. anyway, I had some alsa installation issues because of libraries or whatever. At leasst it works right now....