bojo42's PPA for RT Kernels
Ubuntu 10.04 uses a 2.6.32 based kernel with graphic drivers from 2.6.33, but for 2.6.32 there are no rt patches and so Ubuntu does only ship an old 2.6.31 based realtime kernel. This PPA provides a 2.6.33 based realtime kernel so you can have for example the full graphic experience of Ubuntu 10.04 and even some new features of 2.6.33.
The kernel itself is a plain vanilla 2.6.33.X with the latest rt patchset and configuration is based on the matching 2.6.33.X build from http://kernel.ubuntu.com/~kernel-ppa/mainline plus some changes for realtime usage. So if you run into any problems check if got them with the mainline kernel as well, if that isn't the case you know that it's specific to the realtime patches and configuration.
In case i miss an update of the rt patchset (http://www.kernel.org/pub/linux/kernel/projects/rt/) just ping me: https://launchpad.net/~bojo42/+contactuser
BTW if you use a rt kernel on a desktop machine, you will notice that PulseAudio randomly crash at audio playback. See Bug #367671 for this.
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