Multi gpu display

[zhoucm1]

After compizconfig-settings-manager changes output detection, the 
applications like file browser, glxgears can run full screen spanning 
all monitors.
But some games still cannot, like Unigine heaven, which still is using 
one of monitor mode.

Is there a way to change somewhere to let all applications including 
games run full screen spanning all monitors?

SDL? XRANDR? XINERAMA?

Thanks,
David Zhou

On 2017年07月04日 13:43, zhoucm1 wrote:
>
>
> On 2017年07月04日 13:34, Alex Deucher wrote:
>> On Tue, Jul 4, 2017 at 1:22 AM, zhoucm1 <david1.zhou at amd.com> wrote:
>>>
>>> On 2017年07月04日 11:41, Alex Deucher wrote:
>>>> On Mon, Jul 3, 2017 at 4:32 AM, zhoucm1 <david1.zhou at amd.com> wrote:
>>>>> Hi xorg-devel guys,
>>>>>
>>>>> Anyone can help me?
>>>>>
>>>>> I tried two gpu card with four monitors on Unbuntu 16.04, each gpu 
>>>>> has
>>>>> two
>>>>> monitors.
>>>>> By default config, I can see four monitors all are lighting with its
>>>>> separate desktop instance, and the running application with small 
>>>>> window
>>>>> can
>>>>> be spanning all monitors, but if application only can be run on 
>>>>> one of
>>>>> monitros with fullscreen setting. I attached Xorg log and xrandr 
>>>>> output
>>>>> info.
>>>>>
>>>>> How should I configure if I want to all monitors as a big desktop 
>>>>> or the
>>>>> full screen application can run on all monitors? or How should I
>>>>> do/change?
>>>> You'd need to configure it in the window manager.  Most window
>>>> managers use the geometry info advertised via randr to define what is
>>>> considered full screen.  You need to tell it to ignore that and just
>>>> use the full surface size.  How to do that varies from window manager
>>>> to window manager.
>>> Thanks Alex for input.
>>> I'm using ubuntu16.04, which window manager should be compiz, how to 
>>> tell it
>>> to ignore that and just use the full surface size.
>> https://askubuntu.com/questions/73573/how-to-maximise-a-window-across-two-monitors 
>>
> That's great, it solves my problem, otherwise I'm going to add an 
> extention for xinerama.
>
> Thanks a lot.
> David Zhou
>> Also, looks like wmctrl works as well.
>>
>> Alex
>>
>>> Regards,
>>> David Zhou
>>>>
>>>> Alex
>>>
>