Re: Warning: evdev changes - no auto-grabs anymore

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On Fri, Aug 15, 2008 at 09:51:59AM +0300, Ville Syrjälä wrote:
> On Fri, Aug 15, 2008 at 09:54:58AM +0930, Peter Hutterer wrote:
> > On Thu, Aug 14, 2008 at 01:50:09PM -0400, Adam Jackson wrote:
> > > This is, in fact, one of the main reasons I put SIOCGRAB there in the
> > > first place; you need to keep the keyboard's event stream out of the tty
> > > layer entirely, not just out of reach of the kbd driver.  At the time
> > > the argument was also that you wanted to keep them out of reach of
> > > normal users so you couldn't snoop passwords, but now that there's a
> > > ConsoleKit I think that's less true.
> > > 
> > > Mac mouse emulation we could probably just blacklist away from the evdev
> > > driver.  rfkill is... harder?  Does it get its own event device or not?
> > > I'd think it would have to get one kill device per wireless device.
> > 
> > The issue is not grabbing the mouse emulation device, it's grabbing the
> > keyboard that generates those keys events that should result in a button click
> > on a different device. So we'd need something in the kernel I guess.
> I was pondering about the same issue wrt. DirectFB. I wonder if
> KDSETMODE/KD_GRAPHICS could be extended to take care of this or
> would it break some existing applications.

Yeah, I was thinking about that, but that would mean we have issues
under older kernels.  I think the best was what I was proposing, which


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