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Subjectparport problems in 2.4.[9,10]
Date
I can't seem to get my HP DeskJet 932C to work over the parallel port under 
kernels 2.4.9 and 2.4.10. Not sure about earlier kernels. When the lp
modules loads by default, no interrupt is selected:

parport0: PC-style at 0x378 (0x778) [PCSPP,TRISTATE,COMPAT,ECP]
parport0: cpp_daisy: aa5500ff(98)
parport0: assign_addrs: aa5500ff(98)
parport0: Printer, HEWLETT-PACKARD DESKJET 930C
lp0: using parport0 (polling).
In this case, printing proceeds, but at a glacial pace, something like
15min/page.
When I specify insmod parport_pc irq=7, printing goes quickly, but the
printout gets garbled and leaves the printer in a funky state. When I do
insmod parport_pc irq=7 dma=3, once again the printer works but at
apainfully slow speed. Specifying the dma option also triggers lots of
errors from dmesg:

DMA write timed out
parport0: FIFO is stuck
parport0: BUSY timeout (1) in compat_write_block_pio
spurious 8259A interrupt: IRQ7.

Seems like interrupt driven FIFO output is failing somehow, so it falls back
to polling mode. I can find no interrupt conflict with other devices in the
system.

I have checked in my BIOS to make sure that ECP mode is enabled with IRQ7
and DMA3. I do have CONFIG_PARPORT_PC_FIFO enabled.

What do I try next? Any help would be greatly appreciated.

bb


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