Originally Posted by naquaada

Very interesting news: I removed the 10.5.6 system on my A8N-E FM/S and restored a 10.5.3 system which was based on Leo4All V3 10.5.2 and an AMD patched 10.5.3 update. Then I installed Andys new kernel and made a second copy of it in the root directory, mach_kernel_960.

I don't know if the 9.6.0 kernel was made for 10.5.3, but it worked. Then I tried the TBU - Total Brutal Update. A direct ComboUpdate from 10.5.3 to 10.5.6 on AMD. And it worked! After the update was installed I used the backup kernel for booting, the normal mach_kernel was overwritten with the vanilla kernel from the update. One more reboot was neccessary, then the system booted - to a black screen. OK, no gfx drivers anymore ;-)

I installed from my main system the drivers for the HD2600XT and rebooted. The system was there. But not everything is working, sure. 'About this Mac' leads to a logout/login, no PS/2 drivers, no hardware and RAM information in System Profiler, Geekbench shows 3.70 GHz (should be 2.41 GHz) an so on. But this can be restored. Here's a screenshot.

Much more intersting is, the speed is back! I got about 80-85 points in Xbench in comparison to 59-75 on the direct 10.5.6 installation! Geekbench has 75 points more. Even after the update to Quicktime 7.6, which I thought was the main error source. Mainboard and BIOS are correctly detected by Geekbench, don't know if this is good or bad.

I think I won't mess around with a 10.5.6 image now, I'll test a new installation of 10.5.2 with a direct update to 10.5.7! If this would work on AMD it would be a hammer!