[DRI3] Problems on old Intel GPUs

Adam Jackson ajax at redhat.com
Wed Jul 2 16:55:34 UTC 2014


On Wed, 2014-07-02 at 18:08 +0200, FrantiĊĦek Zatloukal wrote:
> It's difficult to run Fedora on old Intel graphics. From OpenGL 2.0
> support in Mesa lot of apps and (especially wine) games became
> unplayable because the hardware doesn't support OpenGL 2 fully and lot
> of things are slower.

On gen3 (915 / 945 / G33 / GMA3150) yeah, there's half-baked support for
ARB_fragment_shader that tries to work but falls over on shaders that
are too complicated because the hardware simply doesn't support long
shader programs.  But upstream decided to do that because the
alternative was users complaining that shaders didn't work at all...

So yeah, sorry that your GPU is terrible, maybe get a better one.
Alternatively there's driconf which lets you disable that, even at a
per-app granularity so you can see if that's what gnome-shell is
tripping over.  (Note that you'll need to restart shell to make the
change take effect, either by logging out or doing Alt-F2 r)

Though none of this matters for Felix' case, since the 8xx series GPUs
(among their many many other flaws) don't have shader support at all.
Turns out hardware's gotten a lot more sophisticated in the intervening
13 years since that design...

- ajax



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