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| <H2><A NAME="s9">9. How to get out of raw mode</A></H2> |
| |
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| <!-- |
| raw mode, exiting |
| --> |
| <P>If some program using K_RAW keyboard mode exits without restoring the keyboard |
| mode to K_XLATE, then it is difficult to do anything - not even Ctrl-Alt-Del |
| works. However, it is sometimes possible to avoid hitting the reset button. |
| (And desirable as well: your users may get angry if you kill their Hack game |
| by rebooting; you might also damage your file system.) |
| Easy solutions involve logging in from another terminal or another machine |
| and doing <CODE>kbd_mode -a</CODE>. |
| The procedure below assumes that no X is running, that the display is in |
| text mode, and that you are at your bash prompt, that you are using a US |
| keyboard layout, and that your interrupt character is Ctrl-C. |
| <P>Step 1. Start X. |
| As follows: press 2 (and don't release), press F12 (and don't release) |
| and immediately afterwards press = . This starts X. |
| (Explanation: if a key press produces keycode K, then the key release |
| produces keycode K+128. Probably your shell does not like these high |
| characters, so we avoid generating them by not releasing any key. |
| However, we have to be quick, otherwise key repeat starts. The digit 2 |
| produces a Ctrl-C that discards previous junk, the F12 produces an X |
| and the = a Return.) |
| Probably your screen will be grey now, since no <CODE>.xinitrc</CODE> was specified. |
| However, Ctrl-Alt-Fn will work and you can go to another VT. |
| (Ctrl-Alt-Backspace also works, but that exits X, and gets you back into |
| the previous state, which is not what you want.) |
| <P>Step 2. Setup to change the keyboard mode. |
| (For example, by <CODE>sleep 5; kbd_mode -a</CODE>.) |
| <P>Step 3. Leave X again. |
| Alt-Fx (often Alt-F7) brings you back to X, and then Ctrl-Alt-Backspace |
| exits X. Within 5 seconds your keyboard will be usable again. |
| <P>If you want to prepare for the occasion, then make |
| <CODE>\215A\301</CODE> (3 symbols) an alias for <CODE>kbd_mode -a</CODE>. |
| Now just hitting = F7 = (3 symbols) will return you to sanity. |
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