[Mesa-dev] [PATCH 4/4] configure.ac: check for Glamor requirements only when needed

[Emil Velikov]

On 24 October 2016 at 10:47, Michel Dänzer <michel at daenzer.net> wrote:
> On 24/10/16 06:33 PM, Emil Velikov wrote:
>>
>> IIRC glamor + glx isn't really an option.
>
> That's true for Xorg, because Xorg is the thing which provides GLX in
> the first place, so it cannot use GLX itself. (glamor on GLX works in
> Xephyr though)
>
>
>> So as we look the !glamor case (hmm does newer radeons have
>> acceleration in those cases ?)
>
> Not in X.
>
Precisely. So the x11 egl platform requirement seem artificial since
it has nothing to do with acceleration (making things run). To make it
even funnier - if one wants X-less setup, that won't be possible since
we explicitly require the X11 platform (and all its dependencies).

On the glx/dri/opengl side - I'm not claiming that the heuristics are
perfect, but if there's some issue (detection, dependencies and/or
other) in there we should fix it for everyone - just let me know
what's broken and I'll look into it. Please ?

>
>> Speaking of which - I cannot find any reports of people (mis)configuring
>> mesa, leading to lack of glamor/X11 acceleration.
>
> glamor failing to initialize in Xorg because Mesa was built without
> --with-egl-platforms=drm[,...] was a fairly common problem for radeonsi
> users until Marek made it basically impossible. Most of those reports
> might have been just on IRC though.
>
Ack. If anyone has a Xorg.0.log with a gbm-less libEGL handy that'll
be amazing. We could/should be able to make things clearer/easier to
track in such cases.

Thanks
Emil