Tip: Radeon 9700 (R300) on 2.5.66-mm3 kernel

[deviljelly]

Hi,
I've just spent a few hours getting radeonfb working with the 2.5.66-mm3 kernel and an ATI R300 ( 9700, 9500, 9800 etc) . The trick is to apply a patch found at http://www.cs.helsinki.fi/linux/linux-kernel/2003-12/0138.html

This makes sure that the correct frequency timings are used for the board, also I think that you might need to take the 2GB user space option when using a 4GB kernel.

the kernel option I'm using is: video=radeon:1280x1024-32@60

I also had to change modedb.c to add the correct mode for my LCD (maybe the 'dfp' kernel option for radeonfb whould allow it to work this out?)

the lines I added were:

{
/* 1280x1024 @ 60 Hz, 64.0 kHz hsync */
NULL, 60, 1280, 1024, 9260, 248, 48, 38, 1, 112, 3,
FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
},

theses were copied from a spanish posting on another site from a guy that had used the mode line in xfree log to work out the values ala the description in /usr/src/linux/Documentation/fb/framebuffer.txt

I tried to force the 'accel' option in radeonfb, but it hung X, also you will find the fb console soft cursor quite unresponsive in vi and the such like.

There are a few screwed up lines what it changes mode at boot, I saw a post about this but I can live with it.

I'm running a 160x64 console now

have fun

Paul