On Wed, 10 Jul 2002, Marc Aurele La France wrote:

> > > > 2) If I'm running a DGA application and it stops working, is there any
> > > > way for me to safely get back out to X or to the shell?
> > > > Ctrl-Alt-Backspace causes a crash which looks to be the result of DGA not
> > > > giving control back to X when X tries to quit.

> > Oh, ok, how would I go about trying to fix it? It seems its not restoring
> > control to the X-Server.

> > Video: ATi Mach64 2MB
> > Motherboard: DataExpert TX531
> > RAM: 128MB PC100
> > CPU: AMD K6-2 233MHz

> I have not been able to duplicate this problem.  Killing the DGA app
> causes a return to X.  Killing the X server causes a return to text mode.
> Both as expected.

A bit more on this.  If your DGA app looks at keyboard input, then it
>must< implement its own exit sequence.  That's because DGA "steals"
keyboard input >before< the server has a chance to recognise
Alt+Ctrl+Backspace.  In particular, this means that if the app dives into
an infinite loop, for example, the only way, other than rebooting, to
return to X (or text mode for that matter) is to kill the app behind the
server's back.  Yet another reason to get rid of DGA for 5.0.

Marc.

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|  Marc Aurele La France           |  work:   1-780-492-9310           |
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XFree86 Core Team member.  ATI driver and X server internals.

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