Earlier, by message from a Bugzilla post, I had upgraded to a Fedora 11 kernel to fix the loss of CPU throttling after the resume/suspend sequence on my Dell Latitude D630 laptop. Everything was working great.
I was continuing to have some issues and consequently updated my kernel to an even new version of the F11 kernel (still a git pre-RC kernel of the 2.6.29 flavor). This kernel was extremely problematic for me. My Fedora 10/11 hybrid refused to boot and I refused to troubleshoot.
Through all of this, although I had kernel sources install, I was not running an nVidia driver (and you could definitely tell it in terms of graphics resolution and performance with KDE 4) and was willing to take the hit for what was working.
I was notified of a new post, yesterday, on the Bugzilla thread on which I was posting concerning my error that a 2.6.27 kernel had the issue fixed, that it was a Fedora 10 kernel, and that it was in the updates-testing repository for the Fedora downloads. I immediately booted into the last 2.6.27 kernel that I had used, ‘yum remove’d the 2.6.29 Fedora 11 kernels that I had installed and grabbed all the updates I could (all from tty2 in terminal without graphics). I grabbed the kernel 126.96.36.199-170.2.35.fc10.x86_64, and everything seems to be working well.
I again can resume/suspend and keep CPU throttling. I have independent core throttling (as noted in a previous post concerning the Fedora 11 kernels) and the cores seem to actually throttle (noticeably!) through the MHz frequencies listed (800, 1200, 1600, 2000). Quite impressive. So far, the laptop seems to be running smoothly (considerably more so!) with the Fedora 10 kernel.