F11: xorg decision to disable Ctrl-Alt-Backspace

[Ben Boeckel]

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Anders Rayner-Karlsson wrote:

> * Giancarlo Niccolai <gc at falconpl.org> [20090331 12:20]:
>> it may be educated enough to try it. But it is not like that an X
>> session hang so bad that you have to ctrl-alt-bs it will allow you to
>> CAF1-6 at all, or will let you to do anything meaningful with it (i.e.
>> bash may not be able to get the resources to start). When you 
HAVE to
>> CABs, it's because you CAN'T CAF1-6.
>>
>> (There was my two cents, so don't expect me to join in this convo; I
>> just wanted to correct your assumption that you may CAF1-6 away 
a
>> situation in which you have to CABs, which is wrong, as another 
poster
>> pointed out).
> 
> IIRC, and I believe that was pointed out in this thread as well, is
> that these keypresses are handled in the same way by the same 
part of
> the X server. If C-A-Bs works, so will C-A-F2 to drop you at a vc.
> 
> Through past experience, I have never found an instance (since 
moving
> from XFree86 to Xorg) where the Xserver was wedged in a way that
> switching to a vc did not work, but C-A-Bs did. I have seen plenty of
> X lockups (Xorg intel driver issues in F10) in the last few months and
> not a single one of those were resolvable by C-A-Bs.

As I posted elsewhere in the thread, there is a bug where all available 
fds are taken. If the vt doesn't already have bash open, no dice. If it's 
not already running something you can kill with, no dice. (I can type into 
the terminals I have open all i want, nothing actually gets done 
because nothing can be open()ed. C-A-Bs is the only way I know of to 
fix it. There is a bug open for it (486695).

- --Ben

> 
> Cheers,
> 



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