Concha

I've been trying to eliminate the need for NullCPUPowerManagement.kext because I didn't need it with Snow Leopard but when I remove it, the computer freezes about 30 seconds after reaching the desktop.

I read that it required AppleLPC.kext in order to work, so I followed some instructions to patch it for my system, but even with AppleLPC, the results are the same. The only difference that I've noticed is sometimes I get a kernel panic instead of a freeze with the message 'CPU 1 Has no HPET assigned to it' (???). I've also tried 'Enable P-States' and 'Enable C-States' in chameleon, but whatever I do, it's either a kernel panic or a freeze. I don't understand why it's so opposed to working when it was fine in Snow Leopard...

I've read about patching the AppleIntelCPUPowerManagement extension as a solution but can't find any instructions on how to do it. Am I losing some kind of performance by not having CPUPowerManagement working? Please help.

The CPU is a 2.33 GHz Quad-Core Intel Xenon and the motherboard was made by Gigabyte.

I recently installed Mountain Lion as a replacement for Snow Leopard (which worked very well), and everything works amazingly except for the graphics (Nvidia 9500GT), which have been giving me grief...

Resolution, sleep, acceleration, etc. are all fine and working well, but the user interface (spaces, mission control/éxpose and such) will randomly chug and jerk when multiple windows are open. Sometimes it's very smooth but, at other times, it's noticeably laggy and icky. Games, like Team Fortress 2, suffer from the same problem... A framerate of 60fps will randomly drop to exactly 30, with a distracting stammering effect. This did not happen in Snow Leopard.

I've read about this having to do with AppleGraphicsPowerManagement.kext, but attempting to add in device ids and such has produced no result for me. Is this computer just not good enough for Mountain Lion?

Here's its information:

Video : Nvidia 9500GT
Memory: 4GB
CPU: 2.33 GHz Quad-Core Intel Xenon
(Seen as MacPro3,1)

Please help, this is really annoying me.

Hello,

I'm having a lot of trouble with my Nvidia 8400GS 1024MB (DVI, HDMI, VGA) video card on 10.6.8 Snow Leopard. If I plug my display into the VGA port, everything works fine, but I get a blue screen when changing the resolution (or when the resolution is changed by an app) so this isn't an acceptable option, and if I plug it into the DVI port (primary) I get nothing but a black screen after the grey apple logo.

To get the video card to work at all I added the device ID to NVDanv50HAL.kext and used GraphicsEnabler=Yes and npci=0x3000 at boot but everything else is unmodified. I can give any other information about the system if needed...

Can anyone help me?