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il mio computer è un AMD Athlon 1 GHz 512 Mb di RAM e Scheda video Ati Radeon 9600 256 mb S.O. Ubuntu 7.10

Il problema è questo

Sia tramite "Envy" sia tramite "Gestione Driver con restrizioni" installo i driver ma l'accelerazione 3d non funziona
Addirittura se scrivo sul terminale " glxinfo | grep rendering" la risposta è YES ma se digito "fgl_glxgears"

compare questo
__FGLTexMgrCreateObject: __FGLTexMgrSHMmalloc failed!!!
fglX11AllocateManagedSurface: __FGLTexMgrCreateObject failed!!
FGLTexMgr: open of shared memory object failed (Read-only file system)
__FGLTexMgrCreateObject: __FGLTexMgrSHMmalloc failed!!!
fglX11AllocateManagedSurface: __FGLTexMgrCreateObject failed!!
FGLTexMgr: open of shared memory object failed (Read-only file system)
__FGLTexMgrCreateObject: __FGLTexMgrSHMmalloc failed!!!
fglX11AllocateManagedSurface: __FGLTexMgrCreateObject failed!!
FGLTexMgr: open of shared memory object failed (Read-only file system)
__FGLTexMgrCreateObject: __FGLTexMgrSHMmalloc failed!!!
fglX11AllocateManagedSurface: __FGLTexMgrCreateObject failed!!
FGLTexMgr: open of shared memory object failed (Read-only file system)
__FGLTexMgrCreateObject: __FGLTexMgrSHMmalloc failed!!!
fglX11AllocateManagedSurface: __FGLTexMgrCreateObject failed!!
FGLTexMgr: open of shared memory object failed (Read-only file system)
__FGLTexMgrCreateObject: __FGLTexMgrSHMmalloc failed!!!
fglX11AllocateManagedSurface: __FGLTexMgrCreateObject failed!!
FGLTexMgr: open of shared memory object failed (Read-only file system)
__FGLTexMgrCreateObject: __FGLTexMgrSHMmalloc failed!!!
fglX11AllocateManagedSurface: __FGLTexMgrCreateObject failed!!
FGLTexMgr: open of shared memory object failed (Read-only file system)
__FGLTexMgrCreateObject: __FGLTexMgrSHMmalloc failed!!!
fglX11AllocateManagedSurface: __FGLTexMgrCreateObject failed!!

ecc....

(gli ingranaggi stanno fermi)

Usando giochi 3d Come Chromium o Alien Arena vedo solo uno schermo nero
I driver sono 8.40.4

Avete qualche suggerimento per risolvere il problema?

Grazie 1000!!!!!