[WORKAROUND]DRI/OpenGL rendering issue?[i915/intel]

[tclover]

I've just upgraded xorg-server yesterday from 1.9.5 to 1.10.4 because I've just bumped into an DRI/OpenGL issue(?). Until yesterday and using the same x11-drivers set and X server, I could run a poor e17+ecomorph using the poor capabilities of i915/radeon flawlessly. I'm saying poor because the displayed colors are just a little too awful, well, to be fair, it could be the poor (TN) panel that displays those awful colors.

Anyway, at least a little eye candy was possible until then. Actually I use a single stage4 for a desktop and a laptop to avoid compiling the same stuff twice. So after major updates, like libpng-1.5.x went through with a little pain, and after starting to remove gnome-2.32, I've just decide to make a new stage4 so it could serve to make a very quick restore to the laptop because I was satisfied with what I've got; and because as {{,s}bin,lib{32,64},opt,var/{{,local/}portage,{,cache/e}db,lib/layman}} are squashed, making a stage4 is just a matter of a very few minutes!

But now only the radeon is capable of displaying an e17+ecomorph, however, the discret card run too hot to use it all the time. So I've just decided to bump to a xf86-video-intel with sna USE flag which require a >=xorg-server-1.10. I was stuck with xorg-server-1.9.5 because I kept an old nvidia-drivers-275.09.07 dependency when it hit portage a while back, now those drivers are compatible with version 1.10 of X server. So I upgraded X server to version 1.10.4 and rebuild the whole stack of xf86-{input,video}-* with sna USE flag to no avail. Only the radeon driver is capable of running e17+ecomorph. I considered a possible fglrx route but as the discret chips runs very hot, I'm not sure if it's an option.

There's seems nothing particular in Xorg.0.log but a few (WW) warings:

[tclover]

It's a intel driver well know issue for old IGP that cripples DRI/GPU acceleration.

[chithanh]

You are using uvesafb which doesn't work with KMS. Follow the kernel configuration instructions at http://www.gentoo.org/doc/en/xorg-config.xml

[tclover]

Ah yes, thanks chithanh. I tend to forget that... and thanks to you (a post of yours on this same topic: nouveau/i*/radeon/DRM/{,u}vesafb) that I get nouveau working without black screen because of... uvesafb. Well, lets see what I can do because I can run X on top of nouveau/DRM after having booted with uvesafb (a little script take care of that, or it does switch to nvidia if necessary/wanted depending on...).