*** This bug is a duplicate of bug 818830 ***
https://bugs.launchpad.net/bugs/818830
Hi Steven,
I do believe this is a duplicate of bug 818830 so I am marking it as
such. I've been in contact with Intel and they are aware of the power
regression issue and are actively investigating a fix. They have
confirmed that the root cause is the graphics RC6 disablement. The
reason RC6 was disabled is because as you've confirmed, there are some
critical bugs which are encountered when it is enabled, one of which is
the rendering glitches you experience. Going forward, please use bug
818830 regarding further updates to this issue. I will post any
additional information I receive to that bug report. Thanks.
** This bug has been marked a duplicate of bug 818830
[Sandy Bridge] serious power regression from kernel 3.0.0-6 to 3.0.0-7 (rc6
disabled)
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https://bugs.launchpad.net/bugs/834037
Title:
Huge power regression in kernel 3.x on Sandy Bridge laptops
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