2.5.x console keyboard problem.

From: Zephaniah E\. Hull (warp@mercury.d2dc.net)
Date: Mon Dec 23 2002 - 10:19:24 EST

It took me a while to track this down, with a few false paths.

I have verified this is kernel side, so..

The basic problem goes like this, start X, switch away from X with
ctrl-alt-Fn, then switch back to X, this is where the fun starts.

Sometimes (this seems to be a race condition, but I have no idea what it
depends on) things go, interestingly wrong, X gets the message that it
has the VC, it takes control of the screen, and the kernel grabs the
ctrl-alt-Fn used to switch away from X, and does not tell X that it no
longer actually HAS the console.

Resulting in keyboard input going to the VC you switched out from X to,
and the kernel believing that it can print to the screen, but with X also
still trying to control the screen.

If you switch back to the VC X is on then things work from there,
however this is quite obviously quite broken.

Verification that this was kernel side was not too hard, removing the
console binds for ctrl-alt-Fn makes the problem go away.

This happens for 2.5.x, but not 2.4.20, I don't know where in 2.5.x it
started.

Thanks.

Zephaniah E. Hull. 

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