This was very helpful, thanks! After this straightforward procedure (I picked the "optimal" path) my i945-equipped jaunty system went from being like molasses, to being farly snappy.
I'm using the bleeding-edge configuration. I noticed this in my Xorg.0.log
Are those warnings normal? It says that UXA is enabled also.Code:(II) intel(0): direct rendering: DRI2 Enabled (WW) intel(0): Option "AccelMethod" is not used (WW) intel(0): Option "EXAOptimizeMigration" is not used (WW) intel(0): Option "MigrationHeuristic" is not used
I had the Bleeding-Egde setting and wanted to revert changes so I can try the Optimal setting. When I ran the downgrade code, I had error messages saying that many of the packages do not have jaunty versions. I resorted to looking at the xorg-edgers ppa and downgrading packages I found there, that are also installed in my system, to versions from x-updates ppa. By doing that, I thought I had the Optimal version already. My system became much smoother, to my surprise.
I just tried running the package downgrade code again to make sure I have a clean "Optimal" setting. It worked this time. I'm upgrading packages again. I hope this really makes a clean "Optimal" setting.