The newest MesaLib EPIC FAIL

[Stealth]

Tried out new mesalib (7.0.4) and nexuiz (2.4.2) fails with this message:

darkplaces-glx: shader/slang/slang_emit.c:991: emit_move: Assertion `n->Children[0]->Store->Index >= 0' failed.

with screen-freezing for a second before.

It also fails for SDL version

Video card is Intel X3100 (i965GM)

Found interesting info in MesaLib's 7.0.4 changelog:

# Enabled GL_ARB_point_sprite extension in I965 driver
# Enabled GL_EXT_texture_sRGB extension in I965 driver
# Added support for GL shading language in I965 driver

This is all about my driver. Installed version of libdrm is 2.3.1, Intel driver 2.3.2 or 2.4.1 (no difference for this issue).

Recompilation of all the stuff (x-server, mesalib, nexuiz itself) doesn't help anyhow.

Complete log is available here: http://lua.pastey.net/94066

7.0.3 is pretty OK.

Thanks.

[divVerent]

Yes, this is an old bug in Mesa I gave up following. They wanted me to retest with git builds, but checking out their repository with git takes hours. Even worse, after I went through all that once, trying to update to latest (some weeks later, when they had replied) failed.

Someone else with more nerves for this follow up on the bug report. Just look for the error message in the Mesa bug tracker

[Taiyo.uk]

I have an Intel 965 (GMA X3000) chip - the desktop version of the GM965. This is notorious for various bugs here and there. I last built mesa from git about a month ago now. The 965 driver could handle Q3 renderer based games and Nexuiz without any of the eye-candy. More advanced renderers such as Doom3, XreaL, Sauerbraten, etc. would not work at all. I've since bought an ATI card.

Intel is currently changing it's memory manager from TTM to GEM. It is hoped that this will resolve many of the memory related crashes - allot of the crashes were due to fencing errors and what not.

[divVerent]

Anyway, to work around this bug, run Nexuiz by

nexuiz +r_glsl 0

and keep the "OpenGL 2.0 Shaders" checkbox off. The bug appeared when Mesa started supporting GLSL.

[Stealth]

Thanks a lot