RS690M (ie. onboard Radeon X1200-series) is still totally unusable with KMS as shipped with Fedora, unfortunately. Terrible artifacts start showing up as soon as GDM makes an appearance, and it degrades from there until the system is rebooted, or the desktop locks up and has to be kicked over the network.
ufaogros: they never said it was news. They said they were benchmarking it.
Phoronix: looking whether you get the graphical boot or progress bar is not the perfect test for KMS, as it also depends on Plymouth being able to find the graphical splash. If KMS is enabled but Plymouth has some problem displaying the graphical splash, it'll fall back to the progress bar but *at native resolution*. The resolution's the key - if you see boot at native resolution, either graphical splash or progress bar, KMS is enabled. If you see boot as the progress bar at console resolution (720x400, the resolution used for POST and DOS and stuff like that), KMS is disabled.
I own a X1600pro AGP. Since Kernel-Modesetting introduction, XV playback took an enormous hit. As of today, I simple cannot playback x264/720p content (at least, nothing with a length of 5+ minutes) without hogging my CPU time. It gives an impression that is leaking somehow memory, consuming my CPU as time goes by.
I must say that these x264 files are part of a collection and used to play without major problems before KMS/GEM/DRI2 introduction.
Also (this is new) on Fedora 12 ( tested on release day) and Ubuntu Lucid (My actual OS) using KMS (ON) + AGPMODE (8x) compiz, while is on, turns the system unbearably slow. I mean, even a click on the gnome menu takes seconds to actually happen.
These issues are known to the devs?
PS: I'm using radeon, mesa, etc from xorg-edgers PPA and AFAIK those packages are up-to-date.
dodoent: glxgears is not a benchmark, it's not even anywhere close. It would be a much better idea to test with something more resembling real world use than three extremely simple non-lit, non-textured, rotating shapes. Phoronix's own benchmarks are probably the best thing for 3D testing on Linux, actually. Try those.
hobbes: on a quick search I can't find a report of that problem in Fedora or freedesktop.org Bugzilla, or Launchpad. You might want to file a report at fd.o or Launchpad, I guess. Have you verified that it works OK if you disable KMS (nomodeset)?