Option and Shift keys not working with some combinations, for example (Shift + Option + Command)
3626
Keyboard key stuck or not being recognized; how to fix
42700
Using multiple keyboards with different keyboard layouts in Windows
91369
Insert both characters if a dead key combination is not recognized (e.g. 'a → á, 'b → 'b)
158619
Swap caps lock and Ctrl in Ubuntu 13.10
58809
Ctrl -C, Ctrl -V not working in different keyboard layout
48668
How can I swap the Esc and the Caps Lock keys?
104874
Remap a key combination to another combination, e. g. Super+Ctrl+Shift+J -> Ctrl+Shift+Left
51760
Arrow keys, Home, End, tab-complete keys not working in shell
73209
How can I enable Ctrl+Alt+Backspace?
135405
CTRL and ALT keys mapped to Shift for some reason
145976
How to avoid ghosting when pressing multiple keys?
25207
Why doesn't the `time` command work with any option?
63644
CTRL+ALT+T not working
59550
Is there a way to use Dvorak keyboard layout, but with command keys mapped to qwerty?
98213
How to swap between FN and Ctrl keys?
38637
How do I reconfigure keyboard shortcuts for copy and paste?
43820
Ctrl + Alt +  doesn't work on non-US (f.x. German, Danish) keyboard layout