DRI module loading trouble on PPC, xfree86, debian/unstable

[Percy Zahl <pzahl@bluewin.ch>]

I'm experiencing for a while the following problem with the
xserver-xfree86 4.2.1-13 (Debian:unstable)
package (DRI module) using the ATI/r128 drivers on my old PowerBook
G4/400:

/var/log/XFree86.0.log:

(II) R128(0): Direct rendering disabled
Symbol xf86int10Addr from module
/usr/X11R6/lib/modules/drivers/r128_drv.o is unresolved!
Symbol xf86InitInt10 from module
/usr/X11R6/lib/modules/drivers/r128_drv.o is unresolved!
Symbol xf86FreeInt10 from module
/usr/X11R6/lib/modules/drivers/r128_drv.o is unresolved!
Symbol xf86FreeInt10 from module
/usr/X11R6/lib/modules/drivers/r128_drv.o is unresolved!

and thus I do not have the DRI working and no 3d accel:-(

The modules are loaded OK:
r128                  110592   0  (unused)
drmlib                 50404   0  [r128]
agpgart                18864   1
 
Is this a known problem?

-Percy

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