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Macbook and Boot Camp video driver conflict workaround Laptop Macs
Problem: Macbook video firmware may become disrupted on a machine that has MS Windows installed via Boot Camp. This will present as a failure to boot, or a failure to boot completely.

Workaround: When machine fails to boot, the startup sound will sound, but the screen will not display anything. (External monitors will also not display anything.) Press the power button until the machine starts to restart, then press and hold Control-Option-P-R simultaneously to reset the PRAM. Do this three times through startup.

Long-term workaround: Always start the machine while holding down the Option key to choose which boot directory to use.

[robg adds: I haven't experienced this issue myself, but I haven't used the Boot Camp Windows install on my MacBook all the often.]
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Macbook and Boot Camp video driver conflict workaround | 6 comments | Create New Account
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Macbook and Boot Camp video driver conflict workaround
Authored by: dczward on Aug 04, '06 03:56:07PM

Damn! I've been having this problem, and it's been driving me nuts. I've suspected that it was Boot Camp / video driver / Boot ROM related, but I hadn't been able to pin it down. One of the clues was that if I did a permission repair from the MacBook Pro CD, it would sometimes repair permissions on the video drivers.

I've tried 1) taking out the battery, unplugging the power, and holding down the power button for 5 secs (resetting the PMU); 2) Plugging in/putting in the battery, and holding down the power button, forcing it to reload the ROM, and 3) doing PRAM zapping (3 times in a row). I've tries those singly, in pairs, and in various combos, (1, 2, 3; 3, 1, 2; etc. etc. ) and none of them work consistently -- it just eventually "works" again. I'll try the option key trick some more, but that doesn't always work either: if the video doesn't come on, then you don't know if you _have_ options to choose from or not.

I've also tried toggling the "startup disk" off the Mac OS X partition, saving, then back on the Mac OS X partition, and saving. That seems to help for a while.

I guess this is why Boot Camp is still Beta.



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Macbook and Boot Camp video driver conflict workaround
Authored by: themacdetective on Aug 04, '06 07:13:56PM

I noticed this problem after installing bootcamp. I thought it was related to Bootcamp and since I wanted to use Parallels I decided to Zero Data erase the drive. I installed everything fresh and did not install bootcamp. Well, I am still having the issue. It seems if I power off the MacBook for a few hours it will do it. I have to do the PRAM rest to get it to work. I also have tried booting up off the install DVD and setting the start-up disk to the Macintosh HD. I will see if that works.
My question would be if totally erasing the drive and reinstalling the OS does not fix this then what will?
NOTE: I have tried the 3 ring PRAM zap and resetting the PMU. Still did it.



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Macbook and Boot Camp video driver conflict workaround
Authored by: Spencerian on Aug 07, '06 07:22:45AM

I can confirm this issue and the temporary workaround (discovered before posting here). It doesn't happen often, and usually I skip Cmd-Opt-P-R and just restart the computer to bring up the booting. I also wonder if the amount of RAM installed (mine is 2GB) can be a factor in this matter.



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Macbook and Boot Camp video driver conflict workaround
Authored by: dczward on Aug 07, '06 10:55:41PM

Mine has 2GB RAM as well, fyi.



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Macbook and Boot Camp video driver conflict workaround
Authored by: themacdetective on Aug 08, '06 07:19:24PM

Mine has 1GB.



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Macbook and Boot Camp video driver conflict workaround
Authored by: themacdetective on Aug 08, '06 07:22:57PM

I noticed this when I shut down (power off) not when restart. I booted off the install disk and from there I went to Start Up Disk. From there I chose the Mac OS X folder. It SEEMED to help. Will post back it it does not work



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