[Mesa-dev] [Bug 47375] Blender crash on startup after upgrade to mesa 8.0.1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=47375

--- Comment #12 from Barto <mister.freeman at laposte.net> 2012-07-24 21:36:18 UTC ---
(In reply to comment #11)
> Adding new assertions shouldn't effect things like that since you're not
> actually changing any values.  There must be something else happening.
> 

I didn't add new assertions, in fact my "dirty" fix was to delete ( or comment
) some existing assertions , like this:

assert(datatype == GL_FLOAT);

but this causes serious lags in blender, which is not normal, 

when I run blender with the software mode ( export LIBGL_ALWAYS_SOFTWARE=1 )
and with mesa 8.0.4 there is no lags, all is ok about the speed, the reactivity
of the GUI,

but when I apply my "dirty fix" it's very very slow in blender, this is not
normal because the speed shouldn't be lower than in the "software mode" in
blender

in fact the "good" fix is to use an old mesa release like the 7.11.2 version,
the changes in source code made since the 8.0.x release bring this bug with
older ati radeon card,

I have to do further investigations, as you said in your message, 

I notice some error messages in blender with my "dirty fix", but despite these
errors blender doesn't crash ( but it's slow ) :

Mesa: User error: GL_INVALID_ENUM in
glGetIntegerv(pname=GL_MAX_TEXTURE_IMAGE_UNITS)
Mesa 8.0.4 implementation error: unexpected type in get_row()

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