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

[Barry Scott]

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?

Barry