Multi gpu display

[Alex Deucher]

On Fri, Jul 14, 2017 at 4:36 AM, zhoucm1 <david1.zhou at amd.com> wrote:
>
>
> On 2017年07月06日 10:30, zhoucm1 wrote:
>>
>>
>>
>> On 2017年07月06日 00:15, Alex Deucher wrote:
>>>
>>> On Tue, Jul 4, 2017 at 6:26 AM, zhoucm1 <david1.zhou at amd.com> wrote:
>>>>
>>>>
>>>> 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
>>>>
>>>> Could you also tell me how to set it for Redhat7.3?
>>>
>>> I'm not sure.  Probably some setting in gnome shell.  wmctrl -e might
>>> do what you want.
>>
>> Unfortunately, it doesn't combine all desktop to one big desktop.
>>
>> -e option is to resize the window on one desktop, no effect for desktop.
>>
>> I also tried to specify application with it:  wmctrl -r "glxgears" -e
>> 0,0,0,115200,2160, it has no effect as well.
>
> Hi Alex,
>
> From wmctrl -m, I can see Redhat7.3 is using 'gnome shell' as its window
> manager, I searched from google and realize many people are asking the same
> question, but all no right answer for Redhat.
>
> Do you know any guys from Redhat company can help this question?

mutter/gnomeshell doesn't provide a similar knob like compiz does.
We'd need to either patch mutter/gnomeshell or provide some sort of
general override via randr.

Alex

>
> Thanks,
> David Zhou
>
>>
>> Thanks anyway,
>> David Zhou
>>>
>>>
>>> Alex
>>>
>>>> Thanks,
>>>> David Zhou
>>>>
>>>>> 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
>>>>>>>
>>>>>>>
>>
>