UPDATE: The system is fully stable only if I both use a modded "overclocker edition" Sandy Bridge CPU microcode (Rev. 28) embedded into the BIOS and set the kernel boot arg i915.enable_rc6=5.
The modded microcode allegedly allows the CPU to consume less power when operating at higher frequencies, but it's not so clear why rc6 has to be set to 5 and no other value (otherwise I get a very occasional shutdown when running on low battery) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1446027 Title: SNA acceleration causes sudden shutdowns and corrupts CMOS data on the the Asus UX21E ultrabook on a wide variety of kernels since at least Ubuntu 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1446027/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
