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Computers with obsolete graphics with buggy 3D drivers and VM hypervisors like KVM or VirtualBox don't have complete 3D support yet. But you can run Gnome Shell using software rendering (llvmpipe driver) on the CPU.
Computers with obsolete graphics with buggy 3D drivers and VM hypervisors like KVM or VirtualBox don't have complete 3D support yet. But you can run Gnome Shell using software rendering (llvmpipe driver) on the CPU.


* You may need to uninstall your GPU driver by running {{command|yum remove xorg-x11-drv-nouveau}} for example to force enable llvmpipe driver. You will need to restart X by logging out and back in for this to take effect.
'''* NOTE [vbenes] you can fallback to Softrendering by uninstalling your driver (xorg-x11-drv-nouveau for example)'''
 
* This may require creating and editing xorg.conf, or moving the DRI drivers for those cards out of the way to force fallback to llvmpipe, as in, {{command|mv /usr/lib*/dri/radeon_dri.so /tmp}} (substituting the right value for "radeon", ie, i915, nouveau, r200, etc.)  You will need to restart X by logging out and back in for this to take effect.
* Of lesser interest, but still worth checking, is whether GPUs already on the hardware blacklist work with their native driver instead.  This can be checked by commenting out the appropriate entry from <code>/usr/share/gnome-session/hardware-compatibility</code> and logging out and back in to Gnome.
* Of lesser interest, but still worth checking, is whether GPUs already on the hardware blacklist work with their native driver instead.  This can be checked by commenting out the appropriate entry from <code>/usr/share/gnome-session/hardware-compatibility</code> and logging out and back in to Gnome.


{{admon/important | Check if Xorg uses software rendering, run: <code>glxinfo</code> and check output for string: <code>OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 0x300)</code>.
'''* NOTE [vbenes] you can check if using soft rendering in Control Center -> Details (llvmpipe)'''


Or you can check if using soft rendering in Control Center -> Details (llvmpipe)}}
{{admon/important | Check if Xorg uses software rendering, run: <code>glxinfo</code> and check output for string: <code>OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 0x300)</code>}}


== Test Cases ==
== Test Cases ==
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