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A recent system upgrade in 14.04 disabled the Ctrl key in my Asus K55VM-SX086D Laptop. Initially there was some problem where the screen used to go blank when pressing the ctrl key when I was using 13.10, but somehow after upgrade to 14.04 it was working fine. However after the recent upgrade its not working again.

I have checked the default US keyboard layout and it does not seem to recognize the two Ctrl key. Please help.

Do let me know steps that I can follow to resolve this issue. Thanks.

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  • Fire up a terminal with Ctrl+Alt+T, then type in this command: xev. It should tell you every time you input a key. If it doesn't respond to the key, it's a problem with the keyboard. If it does respond with something like a keycode of 37 (you'll need to look at the output of the terminal for this), comment back and I'll look into it further. :) Aug 30, 2014 at 1:23
  • Thanks @AndrewFischer, I tried using xev. The system does not recognize both the Ctrl keys.
    – Amit Sedai
    Aug 30, 2014 at 4:04

1 Answer 1

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I used xmodmap to map the menu key to Control key as a last resort. The script used is as follows:

clear control
keycode 135 = Control_R
add control = Control_R

The above script was saved in a ~/.Xmodmap file and called using the command:

xmodmap ~/.Xmodmap

to enable the new key binding. This can also be set up at startup.

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