xf86-video-intel 1.9.94: (WW) intel(0): Hardware claims plane A is off while software believes it is on

[Eric Anholt]

On Mon, 2007-04-16 at 13:50 +0100, Barry Scott wrote:
> Wang Zhenyu wrote:
> > On 2007.04.12 17:25:53 +0000, Barry Scott wrote:
> >   
> >> I'm testing Xorg 7.2 + updated modules needed to support intel 1.9.94
> >> running on 2.6.20 linux kernel with its drm drivers.
> >>
> >> I'm not seeing anything on the screen, the LCD has gone into screen 
> >> saver mode.
> >> However apps are happy running and I can get a screen snap shot that shows
> >> what I expect on the screen.
> >>
> >> How can I help debug this situation?
> >>
> >> The config and full log are available here:
> >>
> >> http://www.onelan.co.uk/xorg-tmp/945.conf
> >> http://www.onelan.co.uk/xorg-tmp/xserver-945.log
> >>     
> >
> > Try to comment "NoDDC" in your conf. 
> >   
> I've commented out the NoDDC and LinearAlloc
> and I still get nothing on the screen.
> >> Here are some messages that may be related to the problem:
> >>
> >> (EE) intel(0): I830 Vblank Pipe Setup Failed 0
> >>
> >> (II) intel(0): Attempting memory allocation with tiled buffers and
> >>               large DRI memory manager reservation:
> >> (WW) intel(0): xf86AllocateGARTMemory: allocation of 10 pages failed
> >>        (Cannot allocate memory)
> >>
> >> I'm guessing that the (WW) is very at the heart of the problem.
> >>     
> >
> > No, this is not fatal. We try to alloc a large page first for cursor mem,
> > if it fails, as it wants physical addr, we'll try to alloc seperate buffers
> > for hw cursor. I know this message is confusing, we'd better to fix it. 
> >
> >   
> Can you comment on this (WW) which is describing the problem I see 
> perfectly:
> 
> (II) intel(0): Output configuration:
> (II) intel(0):   Pipe A is on
> (II) intel(0):   Display plane A is now enabled and connected to pipe A.
> (WW) intel(0):   Hardware claims plane A is off while software believes it is on
> (II) intel(0):   Pipe B is off
> (II) intel(0):   Display plane B is now disabled and connected to pipe B.
> (II) intel(0):   Output VGA is connected to pipe none
> 
> 
> Why isn't the VGA output connected?

That's a pretty long log, and it looks like there were multiple server
generations.  There was a bug fixed in RC4 for black screen on
subsequent server generations.

-- 
Eric Anholt                             anholt at FreeBSD.org
eric at anholt.net                         eric.anholt at intel.com

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