On Friday 25 April 2003 07:13 am, Tim Waugh wrote:
> On Thu, Apr 24, 2003 at 12:41:03PM -0500, Bob Tanner wrote:
> > I switch the BIOS to EPP 1.9 mode, now the following code hangs.
> > int parport = open("/dev/parport0", O_RDWR|O_NOCTTY);
> > ioctl(parport, PPCLAIM); <-- hangs
> > Why would the ioctl() hang when I try to claim the port?
> Because some other driver has the port already and isn't letting it
> go. It's also a badly-behaved driver, since if it isn't going to let
> go of the port it ought to have asked for exclusive access in the
> first place (in which case the open would have failed I think).
> It might be the lp driver: in interrupt-driven mode it doesn't behave
> nicely like it should.
> Find out: /proc/sys/dev/parport/parport0/devices/active
Ugh! Yep, a badly behaving user-space parport program. I've had a little
"discussion" with the team member about learning to share. :-)
Thanks for the advise.
-- Bob Tanner <email@example.com> | Phone : (952)943-8700 http://www.mn-linux.org, Minnesota, Linux | Fax : (952)943-8500 Key fingerprint = AB15 0BDF BCDE 4369 5B42 1973 7CF1 A709 2CC1 B288
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