Comment 1 for bug 128256

I forgot of one more thing. While the environment is in that broken 'mode', all gtk entry widgets (except firefox) don't display cursor. I can still type there, but i don't see the cursor.

I've just spotted a thing that may cause these misbehaviors. I use a usb-to-ps2 converter to connect my keyboard to the computer. It seems that this small device sometimes resets the keyboard. The keyboard lights its diodes for a second when that happens. I typed an url into firefox now and while typing the diodes blinked, then firefox stopped to accept key presses. My hypothesis is that due to keyboard reset a flag (possibly in gtk, fvwm, X or kernel) somewhere is set to wrong value.

I tried xev to get keyboard state from X, but then I noticed that I can type in firefox again; i think xev is so low-level tool that it could change that flag.