[Xorg] OT: radeon questions

Michel Dänzer michel at daenzer.net
Mon Jul 12 02:20:43 PDT 2004

On Mon, 2004-07-12 at 05:06 -0400, Gene Heskett wrote:
> I've added a 'modprobe radeonfb' to my rc.local but haven't yet 
> rebooted.  modprobing it while x is running (XFree86-4.3.2) resulted 
> in severe screen damages that required several screen switches to 
> fully recover, 

Sure, that's a bad idea. You're lucky nothing worse happened.

> and it seems (subjectively) to be slower.  

Must really be subjective, it shouldn't make any difference.

> glxgears is apparently not using it under these conditions, still in the 
> 170-200 fps area.  Thats essentiually a 'no change'.

radeonfb isn't related to the DRI at all. You're probably looking for
the radeon DRM, the kernel module is called just 'radeon'.

> Currently that portion of the lsmod output looks like this:
> [root at coyote drivers]# lsmod
> Module                  Size  Used by
> radeonfb               56936  0
> cfbcopyarea             3904  1 radeonfb
> cfbimgblt               3008  1 radeonfb
> cfbfillrect             3712  1 radeonfb
> So its loaded but apparently not being used.

You'd have to map consoles to it or start the X server with Option
"UseFBDev" to change that. But it sounds like you don't really need

Earthling Michel Dänzer      |     Debian (powerpc), X and DRI developer
Libre software enthusiast    |   http://svcs.affero.net/rm.php?r=daenzer

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