There are muliple RC6 modes. From "modinfo i915":
+------------
| parm: i915_enable_rc6:Enable power-saving render C-state 6.
Different stages
| can be selected via bitmask values (0 = disable; 1 = enable rc6; 2 = enable
deep rc6;
| 4 = enable deepest rc6). For example, 3 would enable rc6 and deep rc6, and 7
would
| enable everything. default: -1 (use per-chip default) (int)
+------------
Your log shows:
+------------
| [drm:intel_enable_rc6], Sandybridge: deep RC6 disabled
| [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
+------------
The kernel is automatically enabling the basic RC6 mode ("RC6 on") but
not the deep or deepest modes ("RC6p off, RC6pp off"). My suggested boot
parameter will override this, and disable all RC6 modes.
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/993187
Title:
ubuntu 12.04 completely freezes frequently.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/993187/+subscriptions
_______________________________________________
Mailing list: https://launchpad.net/~ubuntu-x-swat
Post to : ubuntu-x-swat@lists.launchpad.net
Unsubscribe : https://launchpad.net/~ubuntu-x-swat
More help : https://help.launchpad.net/ListHelp
