@Neil Burgin - Given that you have not had success in downgrading the xserver using the makson PPA, I thought I would followup on your comment #6. When you say "I have to run CPU Mesa for 3D", are you saying that your system is falling back to Mesa's LLVMpipe software 3D renderer on your CPU and not using hardware accelerated 3D rendering on your GPU? Which ATI card do you have in your system (according to lspci -vvnn |grep VGA) ?
@Neil Burgin - Given that you have not had success in downgrading the xserver using the makson PPA, I thought I would followup on your comment #6. When you say "I have to run CPU Mesa for 3D", are you saying that your system is falling back to Mesa's LLVMpipe software 3D renderer on your CPU and not using hardware accelerated 3D rendering on your GPU? Which ATI card do you have in your system (according to lspci -vvnn |grep VGA) ?