[Nouveau] [Bug 90871] NV30: Xfwm4 use_compositing - garbled display

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90871

--- Comment #4 from poma <pomidorabelisima at gmail.com> ---

What I actually wanted to write,
epoxy support is related to the usage, enablement of the OpenGL, right?
And here it is about compositing part.
If I understood this library simplifies writing code related to OpenGL.

About distro versions "regression",
I expected the Xorg/Mesa/libdrm from Fedora 21 to work also on Fedora 22,
but surprise, surprise, it didn't happen.

I tested also
[Mesa-announce] Mesa 10.5.7
http://lists.freedesktop.org/archives/mesa-announce/2015-June/000157.html
No effect positivo.

Also it is not possible to test whether the NV30 works with 'modesetting':

Driver "modesetting"
~~~~~~
Require OpenGL version 2.1 or later.
(EE) modeset(0): Failed to initialize glamor at ScreenInit() time.
(EE) 
Fatal server error:
(EE) AddScreen/ScreenInit failed for driver 0
(EE) 
(EE) Server terminated with error (1). Closing log file.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Driver "modesetting"
Option "AccelMethod" "none"
~~~~~~
(II) AIGLX: Screen 0 is not DRI2 capable
(EE) AIGLX: reverting to software rendering
(II) AIGLX: Loaded and initialized swrast
(II) GLX: Initialized DRISWRAST GL provider for screen 0
(EE) 
Fatal server error:
(EE) failed to create screen resources(EE) 
(EE) Server terminated with error (1). Closing log file.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Therefore for now I can not conclude what this is all about.
At least Xpresent rendering works, although "serrated" - not quite tear-free.

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