I think we can outrule mtrr then, because this is identic in both your 32-bit and 64-bit system.
Can you perhaps try the following in your glitching 64-Bit system:
* switch to non x runlevel
* sudo modprobe -r fglrx
* mv fglrx.ko somewhere out of /lib/modules
* switch to runlevel with x
For me this gives a X without DRI support with hiccups.
Obviously the fglrx module isn't loaded.
Next thing: reboot
This results in my case in a system without DRI but also without hiccups!
Some othter thing I noticed in my Xorg.0.log is:
CPU is a Athlon64 X2 so this sounds wrong for me. Perhaps different in your 32-bit 64-bit variants, too?
Can you perhaps try the following in your glitching 64-Bit system:
* switch to non x runlevel
* sudo modprobe -r fglrx
* mv fglrx.ko somewhere out of /lib/modules
* switch to runlevel with x
For me this gives a X without DRI support with hiccups.
Obviously the fglrx module isn't loaded.
Next thing: reboot
This results in my case in a system without DRI but also without hiccups!
Some othter thing I noticed in my Xorg.0.log is:
Code:
(II) fglrx(0): Build-Kernel __SMP__: no
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