I install fresh Ubuntu 14. 04 server under ESXI 5.1.0.
During my installation I did not get any erorrs or strange things. My problem is when I boot machine at console screen I get messages like

[ 6.958104] intel_rapl: no valid rapl domains found in package 0 
[ 7.508153] intel_rapl: no valid rapl domains found in package 0
[ 8.058695] intel_rapl: no valid rapl domains found in package 0
[ 8.609932] intel_rapl: no valid rapl domains found in package 0
[ 9.163260] intel_rapl: no valid rapl domains found in package 0

After that messages I am able to log in and my to me Ubuntu works OK. I have internet connection I am able to call apt-get update and I am able to login over SSH.

Should I investigate these errors deeply before I continue build my server.
Do I need to react on these Messages or it is ok to run Ubuntu like this.

  • 12
    The intel_rapl message was driving me crazy. The solution for me was to (sudo) edit /etc/modprobe.d/blacklist.conf and add blacklist intel_rapl. No more messages after reboot.
    – Yvo
    Nov 12, 2014 at 6:18
  • odd... i got this on a fresh install under Parallels and the initial boot process doesn't get past seeing this message.
    – Michael
    Jun 30, 2016 at 19:41

4 Answers 4


This was a change introduced in October 2013 to support Intel RAPL power capping driver in the Linux kernel. This message is non-obstructive, and when it appears it doesn't affect the performance or functionality of the system, since it's only a power management module.

If your virtualization software supports this driver (and the host supports advanced power features) then the message disappears.

You can check the source tree of the module to check what it does.


I know in VirtualBox you can enable PAE/NX which will solve "no valid rapl domains found in package" on Ubuntu 14.04 LTS. I don't know how about ESXI if it supports PAE/NX or not.

Virtual Box Enable PAE/NX

  • 23
    I'm on 14.04, with PAE/NX enabled, and still see the message.
    – cHao
    Jan 20, 2015 at 6:32
  • 5
    I tried your solution to run Ubuntu 16.04 LTS and it worked like a charm. Thanks.
    – Y.H.
    May 15, 2016 at 17:54
  • 1
    I still see the message but it can boot into Ubuntu.
    – ABCD
    May 30, 2016 at 1:01
  • 3
    Same here. Still saw the message even with PAE/NX enabled. Oh well, no big deal. Just a bit annoying :-)
    – pepoluan
    Dec 3, 2016 at 6:11
  • 2
    Did not work for me. Apr 22, 2017 at 16:57

edit the *.vmx file and set paevm = "TRUE" in order to enable PAE - or blacklist the module:

echo 'blacklist intel_rapl' >> /etc/modprobe.d/modprobe.conf
mkinitcpio -p linux
  • 2
    I don't know what mkinitcpio is, but simply adding blacklist intel_rapl to /etc/modprobe.d/blacklist.conf removed that message (note the different filename on my Linux Mint). All I wanted was this rap-whatever to not taint my splashscreen and now it doesn't. Aug 9, 2017 at 9:41
  • @user3125367 mkinitcpio is the program you use to re-generate the init image file that accompanies the kernel at boot time. It contains all settings/drivers/whatever else the kernel needs at boot time before the actual filesystem has been mounted. Sep 1, 2017 at 7:51

I got this message and not able to continue to the login screen.
I solved it by entering Recovery Mode, then run fsck, from the menu option.
It solved my issue, I was able to enter my OS.
I still see this warning message each reboot, but I can enter the OS.

  • Most likely unrelated...
    – MappaM
    Jun 14 at 14:35

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