no screens found(EE) - Cannot use AMD R5 M330 as output to monitor

[Alex Deucher]

On Thu, May 14, 2020 at 1:03 PM Sreyan Chakravarty <sreyan32 at gmail.com> wrote:
>
>
> On 5/14/20 10:17 PM, Alex Deucher wrote:
> > The dGPU on your system has no display hardware.  The displays are
> > only attached to the integrated GPU.
>
> Ok, first of all thanks for the prompt reply, but there is a lot I don't
> understand. I just got into linux in these past 2 months. So please bear
> with me.
>
> If the dGPU has no display attached to it then how is it expected to
> function ? I mean on my desktop I have VGA connected directly to 650 GTX.
>
> How does it work over here ?
>
> >    If you want to use the dGPU for
> > accelerated rendering you will need to use the DRI_PRIME stuff.  E.g.,
> > https://wiki.archlinux.org/index.php/PRIME
> >
> > For example,
> > glxinfo | grep renderer
> > vs.
> > DRI_PRIME=1 glxinfo | grep renderer
> Is the DRI_PRIME set when I select "Launch using dedicated Graphics
> card" in Gnome ?
> >
> > Setting DRI_PRIME will select which GPU is used for OpenGL operations.
> > Modern desktop environments also often have a way to select which GPU
> > the applications run on.
>
> I want all operations to be from the dGPU. You know, my expectation is
> something like that of my desktop I mentioned above. I don't know if
> that is possible.
>
> If not, I would like to understand why it is not possible.

It's not possible.  There are no displays connected to the dGPU and
the dGPU has no hardware to even drive displays.  You can only use it
for render offload.  I.e., you can render an application or game on
the dGPU for improved performance and the results will be displayed on
the integrated GPU.

Alex

>
> Thanks.
>
> --
> Regards,
> Sreyan
>