I can confirm that the patch in comment 28 (Use WaRsDisableCoarsePowerGating) solved the issue on my Intel NUC6i5 with only a moderate increase in power consumption.
With an idle desktop using kernel 4.6.0-rc3, the system consumes: 7 Watts without patch, RC6 enabled, frequent crashes 17 Watts with i915.enable_rc6=0, no crashes 9 Watts with patch, no crashes -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1564759 Title: [i915_bpo] Fix RC6 on SKL GT3 & GT4 Status in DRI: Incomplete Status in linux package in Ubuntu: Fix Released Status in linux source package in Xenial: Fix Released Bug description: Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" & "Iris Pro"), so fix it by adding two patches to extend certain workarounds to cover all chip revisions. To manage notifications about this bug go to: https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
