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My system has two dual core AMD Athlon processors and 4GB of memory. ATI RS690(Radeon X12oo series) onboard chips provide the graphics.

Yet the machine seemed a little slow with 12.10 and apps were crashing, including compiz(compiz was also getting 100%+ of the cpus at times). I did an inline upgrade to 13.04 and the desktop wouldn't display, I only had a blank screen. I ran the following commands (askubuntu entry):

sudo apt-get remove --purge fglrx*
sudo apt-get remove --purge xserver-xorg-video-ati xserver-xorg-video-radeon
sudo apt-get install xserver-xorg-video-ati sudo apt-get install --reinstall libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core
sudo dpkg-reconfigure xserver-xorg
sudo reboot

and was able to restore the desktop, but I wonder if I'm still using the wrong graphics driver. Running sudo lshw -c video provided the following info:

*-display UNCLAIMED     
   description: VGA compatible controller
   product: RS690 [Radeon X1200]
   vendor: Advanced Micro Devices [AMD] nee ATI
   physical id: 5
   bus info: pci@0000:01:05.0
   version: 00
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi vga_controller bus_master cap_list
   configuration: latency=64
   resources: memory:f0000000-f7ffffff memory:fdef0000-fdefffff
   ioport:ee00(size=256) memory:fdd00000-fddfffff

so I figured it was seeing the hardware correctly. The ATI RS690 shows to be supported by Ubuntu and should be capable of 3D graphics but glxinfo | grep renderer shows

OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.2, 128 bits)

Which I believe is a generic driver. I also get the results below from unity_support_test

/usr/lib/nux/unity_support_test -p

OpenGL vendor string:   VMware, Inc.
OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.2, 128 bits)
OpenGL version string:  2.1 Mesa 9.1.7
Not software rendered:    no
Not blacklisted:          yes
GLX fbconfig:             yes
GLX texture from pixmap:  yes
GL npot or rect textures: yes
GL vertex program:        yes
GL fragment program:      yes
GL vertex buffer object:  yes
GL framebuffer object:    yes
GL version is 1.4+:       yes
Unity 3D supported:       no

Shows that 13.04 is running software rendering and that 3D is not supported!
Can someone please help me understand why the system is using software rendering and not doing 3D. I'm willing to buy a PCIE gfx card if that's what it takes.

How to fix this ?

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