I'm running Fedora Core 2 Kernal 2.6.8-1.521 on a Toshiba Satellite A65-12S Laptop. My problem began when I upgraded the kernel to the current version. I lost my sound, it was working in Kernel 2.6.5-1.358. Below are the outputs from /sbin/lspci and $uname -r

[root@localhost sbin]# lspci
00:00.0 Host bridge: ATI Technologies Inc: Unknown device cab3 (rev 05)
00:01.0 PCI bridge: ATI Technologies Inc PCI Bridge [IGP 340M]
00:13.0 USB Controller: ATI Technologies Inc: Unknown device 4347 (rev 01)
00:13.1 USB Controller: ATI Technologies Inc: Unknown device 4348 (rev 01)
00:13.2 USB Controller: ATI Technologies Inc: Unknown device 4345 (rev 01)
00:14.0 SMBus: ATI Technologies Inc ATI SMBus (rev 18)
00:14.1 IDE interface: ATI Technologies Inc: Unknown device 4349
00:14.3 ISA bridge: ATI Technologies Inc: Unknown device 434c
00:14.4 PCI bridge: ATI Technologies Inc: Unknown device 4342
00:14.5 Multimedia audio controller: ATI Technologies Inc IXP150 AC'97 Audio Controller
00:14.6 Modem: ATI Technologies Inc: Unknown device 434d (rev 01)
01:05.0 VGA compatible controller: ATI Technologies Inc: Unknown device 4437
02:04.0 Ethernet controller: Atheros Communications, Inc. AR5212 802.11abg NIC (rev 01)
02:06.0 CardBus bridge: Texas Instruments PCI1410 PC card Cardbus Controller (rev 02)
02:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)

[root@localhost /]# uname -r
2.6.8-1.521
The output from soundcard detection is:
Vendor: ATI
Model: IPX150 AC'97 Audio Controller
Module: snd-atiixp

Any Suggestions?

Thanks in Advance

I'm having the same problem as well, except im running Suse 9.1 Pro

have you checked your alsamixer settings cause by recompiling the kernel you could have resetted the settings, so type alsamixer in the console and see if the sound is on, use your cursor keys to move around and increase the sound, and press esc to quit.
Good luck

i never recompiled the kernel