SysRq handling in the kernel

[Leann Ogasawara]

On Tue, 2010-11-16 at 16:25 +0100, Stefan Bader wrote:
> On 11/16/2010 04:17 PM, Jeremy Foshee wrote:
> > Hi Folks,
> >     I have been in several conversations about the way we are handling
> > SysRq these days. 
> > 
> > The following diff shows what is believed to be the culprit of the new
> > behavior.
> > 
> I seem to have only vague memories about what the new behaviour actually is.
> Is it possible to summarize what is seen?

I think JFo is referring to bug 642792:

https://bugs.launchpad.net/ubuntu/+bug/642792

Basically Alt+PrtScrn no longer captures a screen shot of a window
because Alt+PrtScrn is interpreted as the SysRq key.

And I'd specifically point out comments #7 and #8 in the bug report
which note that this is expected behavior because SysRq handling is
enabled by default in the kernel.  So in my opinion, this is not a
kernel bug.  User space apps need to pick a different key binding for
taking a screen shot of a single window.

Thanks,
Leann

> > http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-maverick.git;a=commitdiff;h=97f5f0cd8cd0a05449cbb77d1e6f02e026875802
> > 
> > Would you mind commenting on the change? I know we spoke briefly about
> > this, and the consensus was that we were handling things appropriately
> > for what we are being sent. I just want to make sure that I, and the
> > people inquiring, understand all of this.
> > 
> > Thanks!
> > 
> > ~JFo
> > 
> 
>