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[Track0000 <developer@xxxxxxxxxxxxxxx>]

Hi 
My laptop is an HP Pavilion 6000, with a G72M (GeForce Go 7400) chipset and the following CPU profile :

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 14
model name	: Genuine Intel(R) CPU           T2250  @ 1.73GHz
stepping	: 8
cpu MHz		: 800.000
cache size	: 2048 KB
.....

cpuid level	: 10
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon bts pni monitor est tm2 xtpr pdcm

And objousvly I exprerienced the same problem.

The latest driver 185.18.36 runs in the same way you described WITH and WITHOUT the workaround above (that looking at the code seems to be a test exclusion but does not solve the problem). 
I tested everything with kernels x.31-12 and x.31-13.

I tested a new beta driver frome the NVIDIA site (the 190 beta) by a
manual installation and it does not solve the problem so I reversed back
to Ubuntu version (185).

However I think this is a strange behavior because the glx module is
properly installed and "glxinfo" returns a properly running extension :

name of display: :0.0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: NVIDIA Corporation
....

glxgears runs properly and Google earth it's extremely fast, but there
are problem with COMPIZ and with KDE also that does not use COMPIZ.

I don't know why but probably this is due to an OPENGL feature that fall
back to a software implementation if the CPU does not have PAT .

I am in doubt about a kernel patch solution or a simple test removal, I
think this is an architectural problem into the driver that dorce PAT
instead of MTRR , and the new 190 driver still does not work.

Bye.

-- 
Compiz broken on Karmic with NVIDIA driver and CPU without PAT support
https://bugs.launchpad.net/bugs/391461
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which is subscribed to nvidia-graphics-drivers-180 in ubuntu.