CVE-2019-0154 caused major power problem, pls backport upstream's fix
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
https:/
the fix released as CVE-2019-0154 increases idle power consumption on intel i915 6th gen and later.
That's because the GPU does not enter RC6 any more.
For example, my Thinkpad P50 (6th gen) idles at 9w with current 5.3 kernels. Previously, it idled at 5W.
Effects on a T480 (8th gen) are less dramatic but still significant.
5.5RC1 has the maintainer's second pass at this, which restores RC6 idling
The maintainer's patch for 5.3 is here:
https:/
I have applied this to tag Ubuntu-
I think it would be very helpful to backport this if you can.
description: | updated |
information type: | Public → Public Security |
information type: | Public Security → Private Security |
information type: | Private Security → Public |
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1856653
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.