No Sound on IBM R51 with SUSE 10.1 and SUSE 10.0

Hi, SUSE 9.3 was the last version I could get the built-in soundcard to work with. Actually it worked out of the box. Starting with SUSE 10.0 I can't find a configuration that works and produces any output at all. SUSE 10.1 is in no way better. lspci shows: 00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 01)         Subsystem: IBM Unknown device 0554         Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-         Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-