[ltp] Xorg radeon vs. CPU powerstate

[Joachim Breitner]

Hi,

Am Mittwoch, den 21.02.2007, 18:17 -0500 schrieb Alex Deucher:
> On 2/21/07, Joachim Breitner <mail@joachim-breitner.de> wrote:
> > although I'm close to getting rid of my T41p, I finally investigated my
> > CPU's power state. Under my normal working conditions the CPU stays in
> > C2 all the time. Neither unloading USB, wireless or GNOME changes that.
> > But what does change it is to switch from Xorg (w/radeon driver) to the
> > console, while everything else might be running. Then the C3 state (and
> > even C4 which only exists when I am on battery) is used at least a bit.
> > So I suspect that the free radeon driver is to blame.
> >
> > Is this known? Does it happen to others as well? Is there a fix?
> >
> 
> This is a known issue.  When the command processor in the radeon is
> active (i.e., DRI enabled), there is bus master activity, so the
> machine cannot enter C3.

Thanks. Does this also apply to the proprietary driver? Is there a way
to disable DRI while logged in?

And since I might buy a new thinkpad soon: Does this problem also exists
with the Intel graphic chips?

Greetings,
Joachim
-- 
Joachim Breitner
  e-Mail: mail@joachim-breitner.de
  Homepage: http://www.joachim-breitner.de
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