[SOLVED] CPU 100% problem with lp processes [debian]

dx486 · 11-08-2017, 08:27 AM

I tried to print an image using my debian 9 stable & Canon LBP6030w printer. It did not print, but since then my 3 CPU cores are running at 100%.

Link to the htop output screenshot.

I cannot kill such processes. F9-9 or F9-3 does not work.

It seems related to "lp" and "cnpkmodulencap".

Even restarting computer doesn't help.

How can I solve this problem please?

rtmistler · 11-08-2017, 08:56 AM

Restarting the computer doesn't help?

Have you tried:

Code:

$ ps -ef | grep lp

And then once you find the lp processes, using:

Code:

$ sudo kill -9 <pid>

Also, turn off the printer.

dx486 · 11-08-2017, 09:08 AM

This worked. Thank you rtmistler!

rtmistler · 11-08-2017, 09:27 AM

I have to admit I'm unfamiliar with F9-9 or any other F9 manipulations.

What I am aware of, and it would've been a next update if you said something like the system was so slow you couldn't type commands, would be to use the system consoles, which you access using CTRL-ALT-F2, or ...-F3, F4, F5, ... up to like F7 and then CTRL-ALT-F8 brings you back to your desktop. However in those system consoles, they are more similar to the command line only, and you can type commands there to try and help fix a non-responding or very slow responding desktop problem.

Glad the original suggestion worked.