David Woodhouse reports that

  xorg-x11-6.8.1-ati-radeon-dynamic-clocks-fix-2.patch

breaks X on ppc.  Ben Herrenschmidt has a set of patches that should
fix the dynamic clocks issue properly and we should try those out once
FC5 opens up.  For now though, we just enable dynamic clocks on PPC
which fix the problem.  Patch by David.

Kristian Høgsberg <krh@redhat.com>

--- xc/programs/Xserver/hw/xfree86/drivers/ati/radeon.man.xorg-x11-6.8.2-ati-radeon-ppc-enable-dynamic-clocks	2005-05-16 17:58:52.000000000 -0400
+++ xc/programs/Xserver/hw/xfree86/drivers/ati/radeon.man	2005-05-16 17:58:52.000000000 -0400
@@ -492,7 +492,10 @@
 based on usage. This can help reduce heat and increase battery 
 life by reducing power usage.  Some users report reduced 3D preformance
 with this enabled.  The default is
-.B off.
+.B on
+on PowerPC and 
+.B off
+on other architectures.
 .TP
 
 .SH SEE ALSO
--- xc/programs/Xserver/hw/xfree86/drivers/ati/radeon_driver.c~	2005-05-23 13:05:46.000000000 +0100
+++ xc/programs/Xserver/hw/xfree86/drivers/ati/radeon_driver.c	2005-05-23 13:14:44.000000000 +0100
@@ -4521,7 +4520,11 @@ Bool RADEONScreenInit(int scrnIndex, Scr
     RADEONSave(pScrn);
 
     if ((!info->IsSecondary)) {
+#ifdef __powerpc__
+        if (xf86ReturnOptValBool(info->Options, OPTION_DYNAMIC_CLOCKS, TRUE)) {
+#else
         if (xf86ReturnOptValBool(info->Options, OPTION_DYNAMIC_CLOCKS, FALSE)) {
+#endif
 	    RADEONSetDynamicClock(pScrn, 1);
         } else {
 	    RADEONSetDynamicClock(pScrn, 0);