On 07/02/2017 01:20 AM, Valerio Bellizzomi wrote:
On Sat, 2017-07-01 at 17:50 -0500, Jon Elson wrote:
A guy brought me an HP elite 8300 desktop machine that he
was having trouble getting working with a stepper controller.
After trying a few things with no result, I put a scope on
the parallel port. What I see is a pulse every 33 ms on pin
1, which is the old parport data strobe. I shut down all
modules such as lp, parport, parport_pc and ppdev, and it is
still doing it. So, some BIOS code or kernel module seems
to be talking to the parallel port card. That is a PCIe
Netmos 9900 chip, which I've used on a bunch of Dell boxes
with no trouble.
Does anybody have any idea what module might be doing this?
(and, how to turn it off)
Thanks,
Jon
have you tried to turn off acpi support in the bios ?
They didn't list it as such, but there were power management
options. That did not help.
Thanks,
Jon
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