On Tue, Jul 22, 2003 at 09:17:29AM +0100, Neil Bird wrote:
> I *don't* think it always does it upon any old 'service cups restart'
> - I'm not sure what the difference is, but the process that hangs
> ('cups/backed/serial' or similar) isn't always running to start with so
> is not always there to hang.
It'll be /usr/lib/cups/backend/serial -- the serial device backend.
Each backend is executed with no arguments at start-up so that it can
report which devices it can see.
I'd guess there is some serial device that is causing the backend's
serial probe to fail. It does this for each /dev/ttyS* port:
open(device, O_WRONLY | O_NOCTTY | O_NDELAY)
and then the same for /dev/usb/ttyUSB*.
What serial devices do you have attached?
Tim.
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