Re: [PATCH] to drivers/parport/ieee1284_ops.c to fix timing dependent hang

Tim Josling
2003-03-22T09:21:48Z

Jeremy,

Good to know someone has read my email.

According to my reading of the code, it should only happen in polled
mode, but I have only one week of experience looking at kernel source.

So it should be a work-around, assuming interrupts work on the parallel
port on your system :-). It is an very vexing problem, as I'm sure you know.

By the way, LJ1100s tend to get page feeding problems about the time the
warranty runs out, but HP has a free kit you can order to fix the problem.

Tim Josling

Jeremy Fitzhardinge wrote:
> On Wed, 2003-03-19 at 00:08, Tim Josling wrote:
>
>>I have an HP1100 printer and since I upgraded to a faster CPU the
>>printer has started hanging. The problem persisteed across 2.0 2.2 and
>>2.4 kernel versions. I am running Red Hat Linux 8.0 on a Compaq Armada E500.
>>
>>The problem occurs intermittently. The symptom is that the 'buffer
>>contains data' light stays on on the printer, but data transfer stops.
>
>
> Ah, so that's why that happens. I've been getting the same thing with
> my LJ1100.
>
> Is this just in polled mode? Does using interrupts constitute a
> work-around for the hang?
>
> J
>
>
>