M5451 upgrade problem on Toshiba notebook to Redhat 9

I was running Redhat 8 with a fine working soundcard.
After upgrading to Redhat 9 it stopped to work

The soundcard detection recognizes the correct card:

ALI Corporation
M5451 PCI AC-Link Controller Audio Device
trident

but cannot set it up any more.

Any advice would be much apreciated.

Lutz



redhat-config-soundcard delivers:

/lib/modules/2.4.20-9/kernel/drivers/sound/trident.o: init_module: No
such device
Hint: insmod errors can be caused by incorrect module parameters,
including invalid IO or IRQ parameters.
      You may find more information in syslog or the output from dmesg
/lib/modules/2.4.20-9/kernel/drivers/sound/trident.o: insmod
/lib/modules/2.4.20-9/kernel/drivers/sound/trident.o failed
/lib/modules/2.4.20-9/kernel/drivers/sound/trident.o: insmod trident
failed
sox: Can't open output file '/dev/dsp': No such device
-9


The system log shows messages like this:
kernel: Trident 4DWave/SiS 7018/ALi 5451,Tvia CyberPro 5050 PCI Audio,
version 0.14.10h, 
kernel: PCI: Found IRQ 11 for device 00:06.0
kernel: trident: ALi Audio Accelerator found at IO 0x1000, IRQ 11
kernel: ALi 5451 did not come out of reset.
kernel: trident_ac97_init: error resetting 5451.
insmod: /lib/modules/2.4.20-9/kernel/drivers/sound/trident.o:
init_module: No such device
insmod: Hint: insmod errors can be caused by incorrect module
parameters, including invalid IO or IRQ parameters.       You may find
more information in syslog or the output from dmesg
insmod: /lib/modules/2.4.20-9/kernel/drivers/sound/trident.o: insmod
sound-slot-0 failed
modprobe: modprobe: Can't locate module sound-service-0-3