The qt4 demo textures doesnt start with
qt-4.3.4
mesa-git
drm-git
xf86-video-intel-2.2.99.903
xorg-server-git
(DRI1)

worked fine with
mesa-7.0.2
drm kernel (2.6.24)
xf86-video-intel-2.2.0
xorg-server-1.4.90

command "qtdemo" then navigate opengl -> textures -> Launch

or 
execute
cd /usr/share/qt4/examples/opengl/textures && ./textures


Failed to initialize TTM buffer manager. Falling back to classic.
Failed to initialize TTM buffer manager. Falling back to classic.
Failed to initialize TTM buffer manager. Falling back to classic.
Failed to initialize TTM buffer manager. Falling back to classic.
textures: ../common/dri_bufmgr_fake.c:576 dri_bufmgr_fake_contended_lock_take:
»((&bufmgr_fake->onhardware)->next == (&bufmgr_fake->on_hardware))«

(in german "nicht erfüllt")
not fulfilled?