It did not help. 4d1:4d0 0c00 GPIOmap (e0 to e8): 0/20000001 4/08051538 8/14000c00 12/00000000 GPIO0: Interrupt:IG 1 GPIO7: Interrupt:IG 2 GPIO12: Interrupt:IG 3 GPIO13: Interrupt:IG 4 MSR 0x51400023: 0xbaba2
MSR 0x51400024: 0xffff
INTA, GPIO pin 0;Input Enabled and Inverted,Interrupt:GPIO BIT 1,IG 10,Not masked, INTB, GPIO pin 7;Input Enabled and Inverted,Interrupt:GPIO BIT 2,IG 11,Not masked, INTC, GPIO pin 12;Input Enabled and Inverted,Interrupt:GPIO BIT 3,IG 10,Not masked, INTD, GPIO pin 13;Input Enabled and Inverted,Interrupt:GPIO BIT 4,IG 11,Not masked,
I suspect the issue is some conflict with the other routing. Note that the factory bios used IRQ 5 for the second USB device. This is not to be found in any PIR table.
However ... I just tried this USB card on factory bios. Lesson: never assume anything. I used to use this card to test PCI stuff and it just no longer works on this system. It did, but ... Linux problem? Who knows? So this card goes back on the shelf ... I'll try to find a non-ISDN PCI card to test with.
ron