Ctrl-Alt-Backspace should request confirmation before killing Xgl

[Jason Spiro]

Binary package hint: xserver-xgl

== Background ==

Every day, many users press Control+Alt+Backspace by accident. Here is some example evidence of how this is so are at the bottom of this bug report.

== Feature request ==

Xgl must somehow request confirmation before terminating after the user presses Ctrl+Alt+Backspace. Maybe it could show a confirmation dialog box.

== Example evidence ==

"In the terminal programs I use, alt-backspace erases the word to the left of the cursor. This is very handy, but when my thumb slips just a small amount it also presses the ctrl key..." -- http://www.lugod.org/mailinglists/archives/vox-tech/2005-09/msg00046.html

When trying to delete a s-expression backwards but hitting Control-Alt instead of Control-Shift: "How can I configure X not to shutdown when I accidentally press control-alt-backspace? This happens a lot, believe it or not, while I'm using emacs. If X were to pop up a confirmation dialog, that
would be even better." -- http://www.answers.google.com/answers/threadview?id=38992

"A word to Alt+Backspace and Shift+Alt+Backspace: I have noticed the danger of shutting down X-Windows when you accidentally hit Ctrl+Alt+Backspace instead of one of the two other keystrokes. So, this might be arguable that users might accidentally mistype a keystroke thus losing some work (as I did :-))" -- http://bugs.kde.org/63540

With sticky keys: "I crashed my system accidentally - I wanted Ctrl-Backspace, and got
Ctrl-Alt-Backspace!
Perhaps sticky keys should not stick the combinations:
Ctrl-Alt-[Del|Backspace|Esc]" -- http://lists.freedesktop.org/archives/xorg-bugzilla-noise/2004-September/003354.html

For more examples see: http://www.google.com/search?q=accidentally+hit+%7C+press+%7C+hitting+%7C+pressing+control+%7C+ctrl+alt+backspace+x%7Cxorg

[Jason Spiro (jasonspiro)]

See also bug 95258, the equivalent bug for Xorg instead of Xgl.

[Sitsofe Wheeler (sitsofe)]

This is an X feature since time immemorial - I don't think there's much to be gained from filing it against Xgl too. You may also be interested in the
Option "DontZap" True
setting.

[John Dong (jdong)]

This is the standard behavior of Xgl to terminate on shift-backspace; To disable this behavior, run xmodmap -e "keycode 22 = BackSpace"