subject:"\[Bug 997040\] Re\: usb printer backend hangs when usblp kernel module is loaded"

[Bug 997040] Re: usb printer backend hangs when usblp kernel module is loaded

2012-09-02 Thread terakin

Till,

After three days test running of printer including output of several dozens of 
pages, I confirmed that option -o usb-unidir-default=true just works for my 
printer, Canon Pixma MP600. In one case, I encountered printer just halt. In 
this case, I started printing with printer's power still off. And moreover, 
system went very unstable and I had to shut down the machine (and could not do 
safely). I convince that I can ignore this case and the option generally works.
Thank you for your definite suggestions!

... One more excuse. Actually, I tried this option before, and it didn't
work in that time ... cups and related packages were not updated. So, I
had double bugs in that time and that's why this option didn't work.

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Title:
  usb printer backend hangs when usblp kernel module is loaded

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[Bug 997040] Re: usb printer backend hangs when usblp kernel module is loaded

2012-08-28 Thread Till Kamppeter

terakin,  LiaM, can you run the command

lpadmin -p printer -o usb-unidir-default=true

in a terminal window, with printer replaced by the name of your
print queue (print queue names are shown by the lpstat -v command.
Then remove all stuck jobs from the print queue and turn off and turn on
the printer. Does the problem go away now?

If not, try the command

lpadmin -p printer -o usb-no-reattach-default=true

clear the print queue and power-cycle the printer. Does it work now? If
yes, try to remove the first workaround via

lpadmin -p printer -R usb-unidir-default

Does it still work?

To remove also the other workaround run

lpadmin -p printer -R usb-no-reattach-default

Please post also the output of the command

lsusb

This way we get the USB IDs of the printer to be able to add permanent
exception rules to the CUPS USB backend.

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Title:
  usb printer backend hangs when usblp kernel module is loaded

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[Bug 997040] Re: usb printer backend hangs when usblp kernel module is loaded

2012-08-27 Thread terakin

Still in problem even after installing most recent update (cups, 
1.5.3-0ubuntu4). 
The symptom is also the same.
* Printer is OK after several periods of powering on.
* Then, printer suddenly hangs without warning. I only can know this by 
notifying printer spool does not proceed.
* The only solution is to shut down the printer. My printer (Canon Pixma MP600) 
cannot shut down by power button after encoutering this trouble, only by 
plugging off the power code.
* Everything seems to be normal after re-enterying power switch of the printer. 
Spooled printing is also OK.
* This situation does not change even if I assign module usblp as a 
blacklisted one.

I cannot carve up the cause of this problem whether this is driver side
and backend side. However, I suppose that the problem stems from
backend, as same problem occurs after changing the driver. And it seems
that some extra signal (possibly from cups?) makes the printer hangs up.
However, it is also strange that the printer never time out after
plugging off USB cable, or lettting it for several minutes.

What is the best way to solve (or, at least collect related information)
this problem ...?

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Title:
  usb printer backend hangs when usblp kernel module is loaded

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[Bug 997040] Re: usb printer backend hangs when usblp kernel module is loaded

2012-08-16 Thread LiaM

I'm still experiencing this error, or one that's very similar. 
After upgrading to precise I am unable to print PDF files on a Canon Pixma4000.
The cups version is 1.5.3-0ubuntu3.
Printing a test page or text file works.  However, trying to print a PDF file 
just hangs.  The file remains in the queue with status Processing.
The debug messages are attached.
I'm happy to try to debug this, since not being able to print is really getting 
to be a problem. 

Any help would be *very* much appreciated!!!

** Attachment added: cups error_log -- keeps repeating Get  USB transaction 
timeout
   
https://bugs.launchpad.net/ubuntu/+source/cups/+bug/997040/+attachment/3264466/+files/cups_debug.txt

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Title:
  usb printer backend hangs when usblp kernel module is loaded

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[Bug 997040] Re: usb printer backend hangs when usblp kernel module is loaded

2012-08-02 Thread terakin

Thank you for fix release of cups. However, I am still having the same trouble
even after applying the latest cups package.
I have two printers connected via USB, Canon PIXMA MP600 and PIXMA MP630. The
symptom is:
* Printer device frequently disappears. We can only see /dev/usb/lp1, no lp0.
* Sometimes printing takes very long time, nearly 1 hour.
* Printing generally succeeds at the first printing after computer is turning
on, but fails after that.
* blacklisting usblp and selecting some options (usb-no-reattach,
usb-unidir-default=true/false) make no effect.
I have 64-bit Ubuntu 12.04 system and uses drivers provided by Canon, both in
32bit. This seems slightly unstable configuration, but it seems drivers just
works fine according to error_log. One strange message from the log is Got USB
transaction timeout during read. (or write), which means usb module has timed
out and printer connection has been lost in some reason.
Is anybody out there explain this ?

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