KDEInit could not launch ‘/usr/bin/kcachegrind’

When I open *.xt files from Dolphin on my KDE Plasma desktop Dolphin would lock up while kcachegrind ran and then when I exited kcachegrind Dolphin would complain:

KDEInit could not launch '/usr/bin/kcachegrind'

So what I’ve done is to create a custom kcachegrind.sh script to run xcachegrind properly and then re-associated *.xt files (application/x-kcachegrind) with the new script in Dolphin.

Bug fixed!

Mapping mouse buttons to keys or commands in KDE Plasma

So see here: How can I map keyboard buttons to my mouse buttons?.

Some notes: run the `xev` program to open up an X11 window which reports on its inputs (keypresses etc).

Reload xbindkeys with: `killall xbindkeys && xbindkeys -f ~/.xbindkeysrc`

Edit the ~/.xbindkeysrc file to program mouse button events. Get the mouse button number from the `xve` command above.

Send multiple keypress events with `xte` with for example `xte ‘keydown Alt_L’ ‘key Tab’ ‘keyup Alt_L’`

At the moment my .xbindkeysrc looks like this:

"dolphin ~/desktop"
     b:9

"xte 'keydown Alt_L' 'key Tab' 'keyup Alt_L'"
     b:8

"konsole --profile localhost"
     b:10

"kstart --activate --window . firefox"
     b:2

Note: b:10 above doesn’t actually work with my ROG Gladius II mouse, there doesn’t seem to be a button for buttons 10 and 11. The extra thumb button on the left at the bottom is the “DPI target button”, it’s handled on the mouse and changes mouse sensitivity, it’s not sent as a button to the workstation. You can read more about the ROG Gladius II.

Installing Kubuntu

So basically I want to run KDE Plasma under Ubuntu and this can be called Kubuntu.

This article is a little bit cargo-clutish. I.e. “I did this and it seemed to work.” and “I don’t do this because it didn’t seem to work.”

I have a pretty heavy reliance on Salt Stack for system configuration. My salt config is all built around Ubuntu 18.04 LTS.

When I need to install a Kubuntu desktop, this is how I do it:

  1. install Ubuntu Server 18.04 LTS from live installer
  2. apt update && apt dist-upgrade && apt autoremove && reboot
  3. apt install kubuntu-desktop && reboot
  4. apt install virtualbox-guest-dkms virtualbox-guest-utils virtualbox-guest-x11 && reboot
  5. apt install salt-minion
  6. vim /etc/salt/minion_id
  7. vim /etc/salt/minion.d/minion.conf
    • master: salt.staticmagic.net
  8. service salt-minion restart
  9. salt-call state.highstate

Note that if your Kubuntu install is a VirtualBox guest you need to start it with a normal start if you want the shared clipboard to work. If you start headless or detachable the shared clipboard will not work (in my experience).

If your Kubuntu install is not a VirtualBox guest you can skip the virtualbox-guest-* package installation above.

A folder named ~/.cache/kioexec/krun/13821_0/ already exists

2017-12-09 jj5 – TODO: document this on my blog…

On Debian GNU/Linux 9.1 (stretch) when I try to open an *.desktop (application/x-desktop) link in a browser I get:

A folder named ~/.cache/kioexec/krun/13821_0/ already exists.

Searching for:

A folder named kioexec krun already exists

turned up diddly squat.

I solved the issue (for me) by changing:

System Settings -> Personalization -> Applications -> Default Application s-> Web Browser

from:

Open http and https URLs in an application based on the contents of the URL

to:

Open http and https URLs in the following browser: firefox

Disable middle mouse button (paste) on Debian KDE

Every now and again I will accidentally click the middle mouse button when I go to grab my mouse, and KDE will dump my clipboard buffer into a BASH shell. Not good. Could run something damaging if I’m unlucky. So see here for the solution. Basically run this to get the mouse device ID:

xinput list | grep 'id='

Then to edit e.g. device 10 to disable middle mouse button:

xinput set-button-map 10 1 0 3

To persist the changes add the set-button-map command to e.g. ~/.xstartup.

Or you can add a pointer configuration to ~/.Xmodmap like this:

pointer = 1 0 3 4 5 6 7 8 9 10

And make sure xmodmap is applied at start-up with an autostart file like e.g. ~/.config/autostart/mouse-config.desktop:

[Desktop Entry]
Type=Application
Name=mouse-config
Comment=Disables middle mouse button.
Exec=xmodmap /home/jj5/.Xmodmap