SysRq handling in the kernel

[Jeremy Foshee]

On Tue, Nov 16, 2010 at 10:01:07AM -0800, Leann Ogasawara wrote:
> 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.
>
That was the conversation I couldn't remember. We did talk about this,
and I remember now that this was the response from before. Apologies for
asking again, and apologies for not adding the bug link.

~JFo 
> 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
> > > 
> > 
> > 
> 
> 
> 
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