ubuntu-x-swat team mailing list archive

[madbiologist <488152@xxxxxxxxxxxxxxxxxx>]

That is indeed great news Alexey.  Are you using the dynamic (dynpm)
power management support or the profile-based power management support?
I profile-based, which profile?

Now for the bad news.  I have just learned that there is a serious
regression in the 2.6.38 kernel used in Natty (the same kernel which
contains the performance improvements I mentioned in comment #23):
compared to Ubuntu 10.10, the power consumption on Ubuntu 11.04 for
mobile devices is up about 10% on average but under some workloads, the
power consumption is up by nearly 30%.  This is unrelated to the ATI
power management support or the ATI performance improvements as it
occurs with Intel / ATI / NVIDIA graphics, but rather is elsewhere in
the kernel and has occurred since 2.6.37.  It is also still not fixed in
2.6.39-rc4.  See
http://www.phoronix.com/scan.php?page=article&item=linux_mobile_uffda&num=1
and http://www.phoronix.com/scan.php?page=news_item&px=OTM2NQ and
http://www.phoronix.com/scan.php?page=article&item=ubuntu_natty_power&num=1
for further information.

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https://bugs.launchpad.net/bugs/488152

Title:
  [RV710] With ATI restricted driver deactivated, GPU is overheating