Re: [CALL FOR TESTERS] VESA High Resolution Console support from DragonFly

From: Eric Kjeldergaard (kjelderg_at_gmail.com)
Date: 05/25/05

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    Date: Wed, 25 May 2005 14:59:32 +0900
To: Xin LI <delphij@delphij.net>

    2005/5/25, Xin LI <delphij@delphij.net>:
    > Hi, Eric,
    >
    > $B:_(B 2005-05-25$B;0E*(B 13:28 +0900$B!$(BEric Kjeldergaard$B<LF;!'(B
    > > 2005/5/23, Xin LI <delphij@frontfree.net>:
    > > > Hi, Jeremie,
    > > >
    > > > $B:_(B 2005-05-23$B0lE*(B 02:38 +0200$B!$(BJeremie Le Hen$B<LF;!'(B
    > > > [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. 

    -- 
If I write a signature, my emails will appear more personalised.
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