https://bugzilla.kernel.org/show_bug.cgi?id=19702 --- Comment #52 from Thomas Renninger <trenn@xxxxxxx> 2011-08-01 07:35:05 --- There already seem to go something wrong with TSC at early boot: Fast TSC calibration failed TSC: PIT calibration matches HPET. 1 loops Most interesting are comments 33, 34 and 35. cpufreq-aperf (measuring the average freq using aperf/mperf) shows frequencies around 500 MHz which is wrong (afaik the cpu only supports 800 and higher freqs). That is the reason why the cpufreq subsystem, taking aperf values to calculate the next frequency into account never raises the frequency. Removing the cpufreq code to look at aperf/mperf values to calculate the next desired frequency fixed the problem for Peter and the machine starts switching frequencies as expected. Be aware that vyncere's problem is something totally different, but that came out later in the bug. Just a guess: Could it be that the BIOS misconfigured some clock multiplier and tsc and mperf are running to slow? I didn't look at the rate tsc/mperf/aperf are really running at. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
