Bug#860591: cups-daemon: Job enters queue, then stops and can't be removed
On Fri 21 Apr 2017 at 22:15:08 +1000, Ben Finney wrote:
> On 20-Apr-2017, Brian Potkin wrote:
> > On Fri 21 Apr 2017 at 06:05:02 +1000, Ben Finney wrote:
> > > On 20-Apr-2017, Brian Potkin wrote:
> > > > cat <printer-ready_file> > /dev/usb/lp0
> > >
> > > There is no such device node:
> > >
> > > $ find /dev -name 'lp0'
> > >
> > > $ ls /dev/usb/lp0
> > > ls: cannot access '/dev/usb/lp0': No such file or directory
>
> There was *no directory* named ‘/dev/usb/’.
>
> That turned out to be key to me figuring out this mystery: The USB
> hub's power had come unplugged. It was responding to some devices, but
> not all.
Great.
I bought a packet yesterday containing what I thought was an SD card and
a micro SD card. 'lsblk' showed nothing when I plugged the "SD card"
into slots on the readers I have. Before returning it to the shop I
purchased it from I consulted a friend. He pointed out the word "adapter"
on the "SD card" and asked why I hadn't plugged the micro SD card into
it!
> Now that I have the USB hub properly plugged in:
>
> * The ‘/dev/usb/lp0’ node appears.
> * The ‘lsusb’ output shows an entry for the USB-connected printer.
> * The ‘cat ~bignose/testq-out > /dev/usb/lp0’ command prints the file.
All systems go, then.
> That leaves the problem of failing to print to the HP printer
> connected via 802.11, which would not be affected by the USB hub. I
> will try again later to diagnose that one.
Consider using the output of 'avahi-browse -art' as a diagnostc.
Regards,
Brian.
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