OK, thanks. The new kernel doesn't show the warning, so probably the upstream commit b47dcbdc5161d3d5756f430191e2840d9b855492 x86, apic: Handle a bad TSC more gracefully works around the problem. I'm building a test package based on openSUSE 3.12 kernel in OBS home:tiwai:bnc935530 repo. It'll take some time until the build finishes. Once when ready, could you try the package in the repo above? It should appear in http://download.opensuse.org/repositories/home:/tiwai:/bbnc935530/standard