On Sat, 5 Mar 2011, Rem P Roberti wrote:
I have a printer, which was installed and is working under CUPS, that seems
to go offline of its own accord. And when that happens I have found no
other option than to reboot. I know, I know...you should never have to
reboot, but that's the only thing that seems to work. When I check out
localhost:631 everything looks good, and all the uncompleted jobs are
there patiently waiting to get processed. But, as I said, the jobs
can't get done without a reboot. When I do reboot, just before the
login prompt shows up, the printer jumps into action and all of the
uncompleted jobs get processed. I should also point out that
immediately after reboot the printer works flawlessly, printing on
demand. It is only after being idle for a while that it just seems to
go offline, without any warning.
The model of printer and how it is connected are likely important.
First guess would be power-save shuts down the printer and it's not
being woken up again. CUPS has an lpstat program which may be able to
tell you something useful about the state of the printer.
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