Hi, I recently installed Ubuntu 13.04 on my Thinkpad T430 (Ubuntu Gnome, actually, but the DE is immaterial). It was a clean install, wiping my old one. Shortly after installing, the updater recommended system upgrades. One of the things installed was a kernel update, 3.8.0-19-generic. I don't remember which kernel was there before, but the original one didn't have any of the problems I'm about to mention.

The first thing I noticed with the new kernel was that power usage was up. At idle, it consumed 1 - 2 more watts, which on my machine is about a 15 - 30% increase. The CPU temperature at idle was also up by 5 - 10 degrees, and the fan was running constantly. Additionally, I couldn't get hibernate to work.

I ended up installing the kernel that worked well on Quantal, 3.5.0-28-generic. This has solved all these problems. Power usage, CPU temperature, and fan usage are all back down to what I was seeing before the upgrade.

So I guess I have a couple questions. First, is anyone else having similar problems? Second, should I report this as a bug, and, if so, where? I'm not sure if the problem is specific only to my hardware, but Thinkpads are supposed to be well supported. I also don't know what I would report, because I don't know specifically what is causing the problems. However, I don't want to have to be stuck on an older kernel for all of eternity if this isn't fixed.