Framebuffer...

Framebuffer...

Post by Ronald Carlso » Sat, 27 Jul 2002 23:05:55



Hello!
I hope not to be too much OT asking what exactly X11 framebuffer mode is...
Can someone explain me? As fas as I know each display adapter should be
compliant to this video mode, but if it's true is it possible to make it run
in 800x600 or even better? What about the colors?

Thanx!

 
 
 

Framebuffer...

Post by Richard Hirne » Sun, 28 Jul 2002 08:49:07



> Hello!
> I hope not to be too much OT asking what exactly X11 framebuffer
> mode is... Can someone explain me? As fas as I know each display
> adapter should be compliant to this video mode, but if it's true is
> it possible to make it run in 800x600 or even better? What about the
> colors?

You can make the Xserver to use the framebuffer. In this case, it
won't load graphics card specific drivers but a generic framebuffer
driver. Graphics output is the done via the framebuffer. The
framebuffer driver may use acceleration etc.

http://www.tldp.org/HOWTO/Framebuffer-HOWTO.html
http://www.tldp.org/HOWTO/Framebuffer-HOWTO-17.html

--


 
 
 

1. TDFX framebuffer driver with 2.4.2

Hi all,

I have recently got hold of 2.4.2 and built in the 3dfx frame buffer
driver (tdfx).
At startup, the kernel detects my V3 3000 AGP fine and switches to the
framebuffer driver (or so it says). The Tux logo appears in the upper
left corner and then everything works OK. So why do I post this message
if everything works OK, you ask ?

Well, first, when switching to fbdev, the console becomes white, the
logo
appears and as the kernel keeps printing messages, only the top of the
screen next to the logo remains white. This is ugly and I am wondering
if there is any way to prevent the console to go white in the first
place.
Also, is the position of the logo configurable ?

Second, I have experimented a bit with the "vga" parameter to change the
resolution. Again, this works OK until the kernel switches to fbdev and
resets to, hmmm, 640x480-something. Is this the normal behaviour ?

The fbset utility enables to change the console resolution to, say,
1024x768-8bpp, but that happens after startup. The (obsolete) man page
recommends to put "fbset" into my rc.local script (I am using RH6.2) but
this still means that the fbdev driver is intialised in 640x480. Is it
possible to get tdfx to start with whatever resolution I want ?

I had a look at linux-fbdev.org this morning but couldn't find any
information on that.
Any help/pointer appreciated.

Thanks a lot.
 Fabrice

--
"Anything that begins well will end badly."
        -- Pudder's Law

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