acd problems, seems aPIC related

Hello,

I have an old nforce2 based AMD box here which should run 7-current i386, but 
besides nvidia instabilities I have the problem that 9 of 10 times the boot 
process stops after attaching acd0.
It's a Teac DW-548D ATAPI CDRW burner.
If I have atapicam enabled I get the well known "INQUERY ILLEGAL REQUEST 
asc=0x24".
But disabling APIC (not ACPI) seems to improve the situation.
Any hints what could be wrong?
Please find attached the acpidump and a verbose dmesg. If the system hangs 
(means aPIC enabled) there's nothing more to see in the dmesg besides some 
aPIC infomation of course.

Thanks in advance,

-Harry