I found lotś of threads about this subject but none of them with my soundcard,
slackware 10
kernel 2.6.7

alsa 1.0.6

alsaconf went great, found the soundcard and everything seemed great. But I dont get any sound at all.

bash-2.05b$ alsamixer
No mixer elems found


lspci
00:00.0 Host bridge: VIA Technologies, Inc. P4M266 Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8633 [Apollo Pro266 AGP]
00:0a.0 CardBus bridge: O2 Micro, Inc. OZ6933 Cardbus Controller (rev 01)
00:0a.1 CardBus bridge: O2 Micro, Inc. OZ6933 Cardbus Controller (rev 01)
00:0c.0 FireWire (IEEE 1394): Texas Instruments TSB43AB21 IEEE-1394a-2000 Controller (PHY/Link)
00:0d.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8233 PCI to ISA Bridge
00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C/VT8235 PIPC Bus Master IDE (rev 06)
00:11.2 USB Controller: VIA Technologies, Inc. VT6202 [USB 2.0 controller] (rev 23)
00:11.3 USB Controller: VIA Technologies, Inc. VT6202 [USB 2.0 controller] (rev 23)
00:11.4 USB Controller: VIA Technologies, Inc. VT6202 [USB 2.0 controller] (rev 23)
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 30)
00:11.6 Communication controller: VIA Technologies, Inc. Intel 537 [AC97 Modem] (rev 70)
01:00.0 VGA compatible controller: S3 Inc. VT8375 [ProSavage8 KM266/KL266]


lsmod
Module Size Used by
usbvision 65824 0
i2c_algo_usb 4740 1 usbvision
videodev 7296 1 usbvision
snd_pcm_oss 49192 0
snd_mixer_oss 17408 4 snd_pcm_oss
ipv6 212064 10
ohci_hcd 18436 0
ehci_hcd 27012 0
eth1394 16904 0
via_agp 6784 1
ohci1394 29828 0
ieee1394 89528 2 eth1394,ohci1394
8139too 20352 0
mii 4096 1 8139too
crc32 4096 1 8139too
uhci_hcd 27920 0
snd_via82xx 24228 3
gameport 3712 1 snd_via82xx
snd_mpu401_uart 7040 1 snd_via82xx
snd_rawmidi 20772 1 snd_mpu401_uart
snd_seq_device 7304 1 snd_rawmidi
snd_via82xx_modem 13736 6
snd_ac97_codec 66912 2 snd_via82xx,snd_via82xx_modem
snd_pcm 80264 4 snd_pcm_oss,snd_via82xx,snd_via82xx_modem,snd_ac97_codec
snd_timer 21764 1 snd_pcm
snd 48356 22 snd_pcm_oss,snd_mixer_oss,snd_via82xx,snd_mpu401_uart,snd_rawmidi,snd_seq_device,snd_via82xx_modem,s nd_ac97_codec,snd_pcm,snd_timer
soundcore 6752 4 snd
snd_page_alloc 9352 3 snd_via82xx,snd_via82xx_modem,snd_pcm
i2c_prosavage 3456 0
i2c_algo_bit 8840 1 i2c_prosavage
i2c_core 18452 2 i2c_algo_usb,i2c_algo_bit
ds 13572 4
yenta_socket 17536 0
pcmcia_core 52676 2 ds,yenta_socket
nls_utf8 1792 1
nls_cp437 5632 1
vfat 10880 1
fat 38336 1 vfat
evdev 7168 0
agpgart 26920 1 via_agp
psmouse 17544 0

the sound worked great with 2.4.2x and alsa 6month ago.
Any suggestions would be great, Iĺl try anything.

Well, since your sound card is supported by ALSA and worked before on kernel 2.4 I think it would be better if you check if ALSA drivers work on kernel 2.6 like they do on 2.4! (more likely they would work!)
Or maybe it is working and set on the default mixer configurations (muteall).

Check that our and tell me if it doesn't work!