Comment 31 for bug 222163

Well, I think you two are some lucky folks using the open-source radeon driver after the upgrade. Issue a "lsmod | grep radeon" to check if you're using it.

The radeon driver brings full 3D acceleration up to R5xx chips (so including the X1600) but it is very experimental when used with R6xx+ chips (all that Radeon HDxxxx cards). At work I'm using the free radeon driver successfully since Hardy on an X1300 with KDE4, most effects anabled and in dual-head mode.

I will upgrade this weekend and we will see if there is anything "fixed" in Jaunty for HD cards.