[Bug 67462] [SNB IVB HSW] Call trace appears after system booting up

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67462

--- Comment #7 from cancan,feng <cancan.feng at intel.com> ---
(In reply to comment #5)
> (In reply to comment #4)
> > (In reply to comment #3)
> > > This should be entertaining. I'll see what I can do with it. Now to find SNB
> > > hardware...
> > 
> > Hi, I check this again(using a latest -next-queued kernel) and find this
> > issue happens on SNB, IVB and HSW platforms.
> > Besides, calltrace has nothing to do with DP, it happens even if system
> > booting without a monitor. So I think you can use any of these platforms to
> > reproduce it.. :)
> 
> We have two calltraces in the dmesg here. The first one is
> 
> [    1.177979] WARNING: CPU: 1 PID: 1236 at
> drivers/gpu/drm/i915/intel_display.c:842 ironlake_crtc_disable+0xd6/0x83c
> [i915]()
> 
> Thus far that tends to only happen with DP when we try to switch it off.
> 
I'm a little confused here..Do you mean this "WARNING" is what we should focus?

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