Colin: Re #3, that seems to have made no difference. With the grub flag set, the cpu still has the same speed.
$cpufreq-info cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009 Report errors and bugs to cpuf...@vger.kernel.org, please. analyzing CPU 0: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 0 1 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 10.0 us. hardware limits: 600 MHz - 700 MHz available frequency steps: 700 MHz, 600 MHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 600 MHz and 700 MHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 700 MHz. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/962947 Title: CPU scaled back to very slow speed, cannot increase speed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/962947/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs