Hi All, I just want to post some status information regarding this issue. I've been in contact with Intel and they are aware of this power regression issue being experienced on Sandy Bridge hardware. They are actively investigating a fix(es). They have confirmed that the root cause is the graphics RC6 disablement. The reason RC6 was disabled is because, as many of you have already confirmed, there are some critical bugs which are encountered when it is enabled. These include:
* Hangs unless i915_enable_rc6=0 * Hang on showing copy dashed frame on a large cell interval in LibreOffice Calc * Activating rc6 results in render glitches I'll try and keep you updated with any additional information that I receive. Thanks. ** Bug watch added: Linux Kernel Bug Tracker #38332 http://bugzilla.kernel.org/show_bug.cgi?id=38332 ** Also affects: linux via http://bugzilla.kernel.org/show_bug.cgi?id=38332 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/818830 Title: [Sandy Bridge] serious power regression from kernel 3.0.0-6 to 3.0.0-7 (rc6 disabled) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/818830/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
