This is in relation to the problems I've been having getting ECP
mode to work without errors when parport is *not* compiled with
CONFIG_PARPORT_PC_FIFO set (or if irq and dma are *not* set to
"auto" in modules.conf). I've discovered that the same Linux box/
printer combination that won't work unless ECP uses DMA/interrupts
has problems with compatibility mode if DMA/interrupts are used.
So, I need to use DMA to do ECP mode transfers but I can't use DMA
if I want to do compatibility mode transfers (and yes, this printer
needs both to work).
Is there any way for the lp driver to tell the parport driver whether
or not to use DMA? I'm pretty sure this is not a long-term solution
to the problem but I'd like to try it.
Beyond that, has anyone seen any similar problems? Any ideas for things
to try?
-- Dave Strauss
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This archive was generated by hypermail 2b29 : Wed Aug 29 2001 - 16:01:15 EDT