Comment 15 for bug 894132

Hi, I can confirm I have this problem using two AMD cards on a triple monitor setup.

Unity_2d session works and running 'unity --reset' does not render the 3d version of unity and the display results in broken windows. I've attached the log (run_unity_reset.log)

Some other info:

uname -a
Linux ringo 2.6.38-13-generic #55-Ubuntu SMP Tue Jan 24 15:34:24 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

/usr/lib/nux/unity_support_test -p
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI FirePro V4800 (FireGL)
OpenGL version string: 4.1.11272 Compatibility Profile Context FireGL

Not software rendered: yes
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 supported: yes

lspci | grep VGA
03:00.0 VGA compatible controller: ATI Technologies Inc FirePro V4800
04:00.0 VGA compatible controller: ATI Technologies Inc FirePro V4800

 grep 'Output.*connected' /var/log/Xorg.0.log
[ 44.955] (II) fglrx(0): Output DFP1 connected
[ 44.955] (II) fglrx(0): Output DFP2 connected
[ 44.955] (II) fglrx(0): Output DFP3 disconnected
[ 44.955] (II) fglrx(0): Output CRT1 disconnected
[ 45.247] (II) fglrx(1): Output DFP1 disconnected
[ 45.247] (II) fglrx(1): Output DFP2 disconnected
[ 45.247] (II) fglrx(1): Output DFP3 connected
[ 45.247] (II) fglrx(1): Output CRT1 disconnected

Hope this helps.