Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I've got a problem with a VIA C3 (1GHz)-system: the system freezes immediately when the CPU frequency goes under 731MHz because of an incompatibility with the (not completely implemented) i686 commands and a powersave feature of the kernel.

There is a workaround: deactivate the "longhaul" kernelmodule via alias longhaul off in /etc/modprobe.d/aliases.

But the system freezes before I can install any Linux distribution - even Clonezilla freezes.

Is there a possibility to deactivate the module with a GRUB boot parameter before the kernel is loaded?

share|improve this question

1 Answer 1

From what I can find, it looks like adding this to your grub boot line will disable the longhaul cpufreq module.


Once you're booted, of course, add that to your grub configuration so it sticks around without your intervention. You might add an additional boot entry in your grub menu WITHOUT this parameter so you can 'test-boot' to see if a later kernel has resolved the issues you're experiencing.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.