[CALL FOR TESTERS] VESA High Resolution Console support from
DragonFly
Eric Kjeldergaard
kjelderg at gmail.com
Tue May 24 22:59:34 PDT 2005
2005/5/25, Xin LI <delphij at delphij.net>:
> Hi, Eric,
>
> 在 2005-05-25三的 13:28 +0900,Eric Kjeldergaard写道:
> > 2005/5/23, Xin LI <delphij at frontfree.net>:
> > > Hi, Jeremie,
> > >
> > > 在 2005-05-23一的 02:38 +0200,Jeremie Le Hen写道:
> > > [snip]
> > > > One question however : is it supposed to consume more CPU than classical
> > > > non-VESA text mode ?
> > >
> > > I think so, it should consume more CPU than classical text mode console
> > > since it draws characters, rather than giving the responsibility to the
> > > video card. A possible optimization would be to map the video card
> > > memory into the space.
> >
> > Tested on my Thinkpad R40 : Radeon 7500. Is it supposed to consume a
> > LOT of cpu? Perhaps there's something funny with -O2 or similar
> > because some things are VERY slow. I have not, however, noticed any
> > major bugs, but screen redraws will take ~1 second if the screen is
> > not cleared and thus causes powerd to kick my processor up to full
> > speed often. Also, the screensaver (logo_saver) seems to take a while
> > to display. The screen goes black for 10 - 15 seconds before the
> > screen saver displays. Through all this, though, it's still so worth
> > it.
>
> Yes, it requires more CPU cycles if you use raster mode. Does it also
> slow down your console if you are running under text mode? I hope
> not :-)
>
If I'm in text mode it's fine, but of course low-res. When I'm in
raster mode I think it's maybe slower than it needs to be? (Slower
than similar situations in Linux, for instance.) Also, if I have some
terminals in text and some in raster, the switch between them is long.
That's hardly a problem by itself, though, as I rarely run mixed
terminal resolutions.
--
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