Re: F11: xorg decision to disable Ctrl-Alt-Backspace

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Adam Jackson wrote:

> On Mon, 2009-03-30 at 22:42 +0200, Kevin Kofler wrote:
>> Colin Walters wrote:
>> > No, the right solution is to examine the cases for why people 
were
>> > using the key before, and come up with a design which 
addresses them.
>> 
>> This will not help at all, because people expect to be able to use 
the
>> current key combo, not something new they never heard of.
> 
> So let's list the cases that zap would actually recover from:
> 
> 1: stuck grabs
> 2: focus reverts to None and your window manager is dead
> 3: X driver that's decided to stop rendering (or stop rendering
> correctly)
> 
> In case 3, you need to blow away the session and there's no getting
> around it.  So VT switch and killall gnome-session will do just fine.
> For case 2, I seem to recall this being an unpleasant requirement of 
the
> X protocol somewhere along the line; but I'm looking into it.
> 
> For case 1, you might be able to recover if you could just figure out
> which client was being obstreperous.  So clearly the right thing is to
> dump active grab state to the X log on VT switch.  If there's anything
> there, then you know who to blame and you can pkill just that and
> recover.  If there's not, then the session is doomed.
> 
> Something like this perhaps:
> 
> http://ajax.fedorapeople.org/patches/xserver-grab-debugging.patch
> 
> I mean, I know it's bad form to post code to a development list, but I
> hope I can be forgiven this time.
> 
> - ajax

I'll add

5. Maximum number of open files hit (I experience when using KWin 
compositing on intel driver).

I know of no non-C-A-Bs way to get out of it without rebooting. 
<https://bugzilla.redhat.com/show_bug.cgi?id=486695>

- --Ben
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