I have just isolated the problem to the r300 or radeon DRM (found by commenting out the drm module line in xorg.conf, removing the radeon and drm modules from the kernel and starting Xorg) as well as uhci_hcd.
The radeon problem is interesting, because it only blocks C3 or lower states when you're in X. If you swtich to another VC, you will be using C3. The uhci_hcd issue is somewhat thornier, as I believe that my bluetooth controller might be detected on the USB bus is brought back online. Regardless, whenever uhci_hcd is in the kernel, I don't get C3. -- Unable to reach C3 or C4 powersaving states when uhci_hcd is in kernel, or radeon driver (r300) is in use. https://bugs.launchpad.net/bugs/105011 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list [EMAIL PROTECTED] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
