Video Drivers get mucked up when switching between Parallels and Bootcamp (windows 7)

[jhandel]

Hello
I have a Windows 7 Bootcamp partition that I also have setup as a VM in Parallels.. When ever I switch between the two enviroments the Bootcamp video drivers are lost.. The flow is something like this.

1) Start booted into Bootcamp with good drivers (all is fine)
2) Shutdown
3) boot into OSx
4) Start Bootcamp VM
5) All is fine, I can run just fine, windows or not, and can resize windows and it auto resizes the "display" in windows.
6) Shutdown
**** Here is where the experiance breaks down ****
7) Boot into bootcamp partition
8) NVidia drivers are lost, screen runs at default resolution (800x600)
9) Go to device manager, reload the nvidia drivers on the Display Adapter (it will have an exclimation point next to it)
10) reboot.
11) Windows is working with the right drivers now and all is well.
12) never use parallels, or you will have to repeat steps 9,10 and 11..

This wouldn't be a big deal, except those of us doing Windows Phone 7 Development pretty much have to be in bootcamp to really work with and test with the emulator.

Josh

 

[joevt]

Maybe there's a conflict between Parallels and NVidia drivers?

Create a new text file with the following contents and save it as a .bat file, something like "Device Manager With Hidden.bat"

set devmgr_show_nonpresent_devices=1
start devmgmt.msc

Double click the file in Windows, select View -> Show Hidden. Then go to the Display Adapters. In Windows XP, I see the following:

My Boot Camp disk is on an external hard disk. ATI Radeon HD 4800 Series is the video card on my Mac Pro. The Radeon X1600 is from an iMac. Parallels Video Driver is from Parallels Desktop 3. Parallels Video Adapter is from Parallels Desktop 6.

Maybe you can use the above to see what Parallels is doing to the NVidia drivers? Do a before and after. Check the device hardware Ids.

 

[Hassler]

Anyone have a fix for this yet? I'm having the same exact issue with a new Macbook Air.

 

[DHO]

Me too.

I have this issue on my 27" iMac with the ATI Radeon HD 5750

Installed Vista on BootCamp: Got it up and running fine.
Installed Parallels 6: Got BootCamp VM up and running fine.

Went back to Bootcamp and found video is wrong resolution. (and wrong driver?)