I have a Das Keyboard plugged into a ThinkPad running Linux. For some reason, sometimes Ubuntu requires me to re-run xmodmap when I unlock my screen, which swaps my Caps Lock key with Control, as I desire. This happens so often that I usually leave a terminal window open where xmodmap is the last command that I ran, so I can hit ↑ and then Enter to re-run the command and fix my keyboard. Unfortunately, sometimes I forget to do this right away, and I don’t notice until I use the Caps Lock key and discover that it has forgotten its mapping to the Control key.
Today was one such day. Unfortunately, I forgot to hit the Caps Lock key again to disable it before running xmodmap (which as described, I do without typing any characters, which would have alerted me to caps lock being on). Now caps lock is enabled and I have no key I can hit to disable it because Caps Lock is already mapped to Control. I tried logging out and back in right away, but apparently that is not “long enough” for Ubuntu to forget my key mapping. (Also, it was hard to log back in because I had to remember to hold the Shift key down while typing my password.) Is there anything I can run from the command line to undo this easily rather than creating a new .xmodmap file that undoes the mappings added by my current one?
Answer
You can run the setleds -caps command from within a console. To get to a console, press Ctrl+Alt+F1, and press Ctrl+Alt+F7 to get back to where you were.
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