[ltp] Direct Rendering's affect on battery life?
Wed, 5 Apr 2006 10:12:56 -0500
I finally found a background that works well with my pseudo-transparent
terminal emulator (it's really difficult to find one that uniformly contrasts
well with cyan, green, blue, magenta, and red!). Everything was working
really nicely, so I thought I'd look into what was possible to make it even
nicer... so I played around with installing fglrx, but before that just
turning on DRM/DRI (which I really hadn't been using previously) to see if I
could get anything out of XComposite, XRender, and XDamage. I didn't get
that far with fglrx, but I /did/ notice that DRI finally worked on the Radeon
Mobility 9600 that's in my T42 (DRI wasn't supported for the 9600 the last
time I played around with it).
I assume DRI is nice for mplayer or something... actually, I was getting by
before fine without it.
One thing, though, that I think I noticed, was that my power was draining
faster... by about 1.0 to 1.5 Watts (so not exactly an insignificant amount).
However, I'm not so certain of this power loss; power dissipation isn't
exactly constant, and there's a lot of settling and averaging to account for.
I didn't exactly run a statisical experiment... just eyeballed it.
I guess I'm wondering if anyone in this forum:
1) agrees that DRM/DRI does indeed cause a power loss, and if so
2) knows a way to set up X to curtail the loss.
Feel free to throw in any other comments you might have too; I'm not trying to
make this too targeted a question.