Me too. A workaround that'll cost you a little battery life (but probably not more than a few tens of minutes out of four-plus hour runtimes) is to add
processor.max_cstate=3 to your grub command line. This turns off the problematic C4 power state of deep CPU sleep at reduced voltage, but otherwise leaves power management unaffected.
( For Ubuntu users,
dpkg-reconfigure grub2 will offer to let you edit the kernel command line. )