not critical as you can always switch tty. In general, typing Ctrl-V
Ctrl-O will restore sane values.
+I encountered one time a garbage case on a linux console, which was solved by:
+
+ echo -e \\033c
+
+More details to be found [here](http://www.tldp.org/HOWTO/Keyboard-and-Console-HOWTO-4.html).
+
## Mouse invisble or unusable because moving erratically
The mouse invisible can happen inside some sophisticated applications