Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Linux kernel has cumulated multiple power management regression bugs which make systems affected barely usable. A system that works at 30/30 temperatures on Windows during office work may work on Linux at 70/65 while staring at the desktop without any programs being actively used. The power usage / batery drain of course go along with the temperatures. There are no fixes to the problems yet. Just partial temporary "solutions"

Can someone share his knowledge / prediction / estimate on a realistic release date for the fixes? (please say which of these you're posting) This will help me to make a decision on further steps until the real fixes to the kernel arrive:

The timeline of the past linux kernel releases
So judging upon the history of the kernel releases it's safe to say that waiting is not a good choice.

share|improve this question
Linux is behaving technically correct. The hardware have buggy firmware that does not announce Active State Power Management (ASPM) support and properly confirm to the PCI Express standard. – Anonymous Oct 25 '11 at 22:48
@Anonymous Well, Linux turns a good chunk of the computers out there into ovens. This is also technically correct. Read as: What you've said is of little importance with respect to the question and completely irrelevant to end users. – Bucic Oct 26 '11 at 6:27
up vote 2 down vote accepted

There is no actual date or any realistic release. Not even in the staging area for the 3.2 version of the Kernel. you can only wait until the diverse groups that are working on this start showing some progress (if any) on this problem which is one of 3 huge ones I see:

  • Faster Power Consumption
  • Multiple Problems Related to Intel's New Architecture (Sandy & Ivy Bridges)
  • Increased Temperature

There are other but this 3 are the ones that affect more users.

I know it has been a long time since this problems appeared (Since the 2.6.38. 2.6.37 was fine), not only for battery drain and temperature but Sandy & Ivy also. The only thing is to wait and know that, since this is an open sourced work, there are thousands of eyeballs looking at the code and trying to help in any way they can to solve the problem.

For what I have read in several places, trying to solve one problem creates others for other users and this is something most developers do not want. They want to solve the actual problem without creating new ones and since Linus Torvald is VERY EXPLICIT in this particular way of working, any added merges to the kernel that fix one of this, or any other for that matter BUT create other problems will not be added to the master kernel. I find this to be a better way of working towards a regression free kernel than as it did not too long ago were an added patch created more problems than it solved.

I will not say that at the end of the 3.2 version or in the 3.3 version, 3.4,...4.0 version this problem will be solved but our only thing right now is to wait or be part of the developers of the kernel and work on that problem.

There are many studies at phoronix about this issue (and other specific stuff like Intel) like:

So to answer your questions that is in all of us the short answer is: There is no sure date to when this problem will be fixed but it WILL be fixed.


As mentioned by our very own famous user29347 (who we will now call the mistery man) there are 2 Phoronix links that show progress in regards to the Power regressions and other related news but one in particular where is mentioned that there was a Pull a couple of days ago that finally solved this problem in the 3.3 Kernel. This link is:

So the 3 points mentioned above about power consumption, multiple architecture problems for ivy and sandy bridges, video problems and temperature problems will be solved in the 3.2 and 3.3 kernel versions. Most probably any left over misc bug will be addressed in the 3.4 kernel and finally finish anything left over.

share|improve this answer
Thank you very much for your input. Since we don't even have a starting point to figure out the answer maybe you someone could just drop us a clue - how long may it take to get to e.g. Linux kernel 3.4. 200% precision is fine! Rumors with a minimal basis are fine! This is is supposed to be an >estimation<. – Bucic Oct 26 '11 at 20:04
Sorry user29347 (Bob from now on). We are the same as you, do not have an estimation. It could be in 6 months or 6 years. – Luis Alvarado Oct 26 '11 at 20:23
Roger that :) So my edit of the original post will be somewhat useful (the timeline). – Bucic Oct 26 '11 at 21:04
hahaha yeah. But you can either accept an answer or change the question to something that can be more specific. – Luis Alvarado Oct 26 '11 at 21:37
I of course accept the answer :) although if someone hears anything about the subject, please don't hesitate to post your findings/rumors/new estimations. – Bucic Oct 27 '11 at 11:47

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.