From: John Zielinski <grim@undead.cc>
To: Linux Frame Buffer Device Development
<linux-fbdev-devel@lists.sourceforge.net>
Subject: Re: Framebuffer fbtest issues
Date: Thu, 27 Nov 2003 21:46:06 -0500 [thread overview]
Message-ID: <3FC6B6EE.9000307@undead.cc> (raw)
In-Reply-To: <Pine.GSO.4.21.0311271103000.19234-100000@waterleaf.sonytel.be>
Geert Uytterhoeven wrote:
> How much memory does the Radeon 9200 have? Probably at least 64 MiB.
> Usually
> reading from video memory across PCI/AGP is slow, that's why usually it's
> faster for fbcon to scroll by redrawing all characters instead of
> copying video
> data.
>
>
>
It has 128 MiB. I didn't realize that reading video memory was that
slow...
So it's a better idea to not save the frame buffer if it's in KD_TEXT
mode and just have the fbcon redraw it. I'll post my patches to fbtest
later so you can see what I'm talking about.
John
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prev parent reply other threads:[~2003-11-28 2:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-26 10:15 Framebuffer fbtest issues Hetz Ben Hamo
2003-11-27 3:39 ` John Zielinski
2003-11-27 10:04 ` Geert Uytterhoeven
2003-11-28 2:46 ` John Zielinski [this message]
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