Friday, July 29, 2011

disable touchpad while typing

On laptops, the touchpad sometimes gets in the way of typing. It is possible to configure the touchpad so that it is automatically disabled while typing.

I did this in KUbuntu 10.04

This is done using syndaemon (found in package xserver-xorg-input-synaptics). Create a script called syndaemon.sh with the following content:
syndaemon -i 1 -d
Then set the script as executable and place it in your startup scripts (System Settings > Startup)
May need to restart...

Thursday, July 28, 2011

printing on a canon printer from linux with job accounting

At work we have this Canon iRC2550i network printer. Job accounting (username and password) is used to protect against unauthorized used of the printer / photocopier. Unfortunately, it does not work out of the box under Linux. So here is how to do it. (Note: I had to try lots of things before I managed to make this work, so maybe there were so hidden steps...)

- Download and install the UFR II driver from Canon
http://support-sg.canon-asia.com/P/search?model=iRC2550i&menu=download&filter=0&tagname=g_os&g_os=Linux
Choose the UFR_II driver. This is an archive file, unpack it and go to the 32 bit debian folder.

Before installing the debs there is a small trick, as they depend on gs-esp and it has been removed from the repo starting from Maverick.

Make sure ghostscript-x is installed (sudo apt-get install ghostscript-x)
Generate a fake gs-esp package:

Install equivs (sudo apt-get install equivs)
echo "Package: fake-gs-esp" > fake-gs-esp.control
echo "Provides: gs-esp" >> fake-gs-esp.control
equivs-build fake-gs-esp.control
sudo dpkg -i fake-gs-esp_1.0_all.deb
Then install the UFR cups drivers:
sudo dpkg -i cndrvcups-common_2.20-1_i386.deb
sudo dpkg -i cndrvcups-ufr2-uk_2.20-1_i386.deb

- Add the printer on your system (Cups) using the UFR II driver: HP JetDirect 172.18.114.223:9100

- Configure the job accounting:
sudo cnjatool -e [printer name] (to enable job accounting)
cnjatool -p [printer name] (to set the username and password)

Optionally, cngplp can be used to configure the printer (it's a GUI)