Now, about https://wiki.ubuntu.com/DebuggingPrintingProblems and the
section "USB printer does not print or prints garbage" (I guess I
already went through this before posting) :
btw, the system's current state is :
- cups service stopped
- usblp reloaded, so that I could have /dev/usb/lp0 in order to run the tests I
posted previously. So I
modprobe -r usblp
but then
service cups start seems to start, but lpstat -t does not return ? So I
restopped cups, reloaded usblp, restarted cups, and this time lpstat -t
returned ? But you rely on libusb now ? weird, weird ? anyway, I am
running the tests below with cups enabled and usblp loaded - just to be
accurate.
1 - HP Desjet 710C, no network connection
2 :
* cancel -a : done
* lpadmin -p HP_DESKJET_710C -o usb-unidir-default=true : done
* lp lines.ps (containing 56 lines) : I am remembering, I already ran this
test : it fails, the printing stops some lines before the last one - it is not
always the same (random)
* lpadmin -p HP_DESKJET_710C -R usb-unidir-default : done
BTW, here I have (as after each printing) :
root@rubedo:~# lpstat -t
scheduler is running
system default destination: HP_DESKJET_710C
device for HP_DESKJET_710C: usb://HP/DESKJET%20710C
HP_DESKJET_710C accepting requests since Mon 23 Dec 2013 08:21:00 PM CET
printer HP_DESKJET_710C is idle. enabled since Mon 23 Dec 2013 08:21:00 PM CET
Sending data to printer.
so before running the last test I am restarting cups :
root@rubedo:~# service cups restart
cups stop/waiting
cups start/running, process 9756
root@rubedo:~# lpstat -t
scheduler is running
system default destination: HP_DESKJET_710C
device for HP_DESKJET_710C: usb://HP/DESKJET%20710C
HP_DESKJET_710C accepting requests since Mon 23 Dec 2013 08:21:00 PM CET
printer HP_DESKJET_710C is idle. enabled since Mon 23 Dec 2013 08:21:00 PM CET
clean !
3 :
* no need for cancel -a, the queue is empty, cups has been reset
* lpadmin -p HP_DESKJET_710C -o usb-no-reattach-default=true : done
* lp lines.ps : no way ! it stopped at line #54 (as the previous test did)
* lpadmin -p HP_DESKJET_710C -R usb-no-reattach-default
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https://bugs.launchpad.net/bugs/1258919
Title:
067b:2305 printing issue with parallel-to-usb adapter
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https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1258919/+subscriptions
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