[Intel-gfx] Continuous EDID probing (was: Re: [PATCH] Manage PIPESTAT pending interrupt values to unblock vblank interrupts)

[Steven J Newbury]

On Fri, 2008-11-07 at 22:00 +0000, Steven J Newbury wrote:
> On Fri, 2008-11-07 at 21:44 +0000, Steven J Newbury wrote:
> > On Fri, 2008-11-07 at 20:45 +0000, Steven J Newbury wrote:
> > > On Fri, 2008-11-07 at 11:11 -0800, Eric Anholt wrote:
> > > > On Fri, 2008-11-07 at 14:01 +0000, Steven J Newbury wrote:
> > 
> > > 
> > > > > This is possibly also related to the massive slowdown I get X uses 20%+
> > > > > CPU constantly and continually probes DDC, when I switch to battery,
> > > > > this I had expected to be fixed by the recent patch removing ACPI event
> > > > > handling, but strangely it still occurs.
> > > > 
> > > > You're the only person I've heard of with this problem.  You'll need to
> > > > figure out what's causing it.  We still handle ACPI events, it was just
> > > > an internal timer potentially firing off DDC that was removed.
> > > > 
> > > I wonder if it's the VBIOS triggering continuous events?  It may have
> > > started happening when I updated to revision A13 (the latest) of the
> > > Dell D830 BIOS.  Perhaps I'm the only tester with a D830?
> > > 
> > > Any idea how I could track this down?
> > > 
> > 
I've discovered this behaviour only occurs when gnome-power-manager
and/or gnome-settings-daemon are running.  I'm guessing this started
after the work to stop the flicker people were experiencing when
starting GTK apps, although I never suffered previously from that bug
myself.  So this could be a GTK bug?  I'm using gtk+-2.14.4.