help! kernel panic on running system

[jamba77]

I have a running System (10.5.6.) with Vanilla kernel. ( I just forgot to make a backup with carbon copy cloner (another thing learned )

 

ok, I installed a new kernel (from 10.5.7) and got a kernel panic. How can I undo the last update in Terminal with install disc? (I dont want to loose data)

 

arggh

[oldnapalm]

Did you backup the kernel and extensions folder before the update? If you didn't I'm afraid you won't be able to undo the update.

[jamba77]

of course I did, also all extensions, they are in root level.... I just dont know the commands..(and I´m not an Apple pro.. )

 

is there a possibility to do this not in terminal but in boot options..( -s -f ..)

[oldnapalm]

I guess it must be done in terminal.

 

Maybe you don't need to restore all kexts and kernel, just some of them, but to find out I would need to see the error screen.

 

To restore all I would do this: (I will suppose your Mac partition is called "Mac OS X" and the backups are called mach_kernel.bak and Extensions.bak, and they are in root level)

boot the install DVD and open terminal

cd /Volumes/Mac\ OS\ X
mv mach_kernel mach_kernel.new
mv mach_kernel.bak mach_kernel
mv System/Library/Extensions System/Library/Extensions.new
mv Extensions.bak System/Library/Extensions
rm System/Library/Extensions.mkext

When you type the folder and file names, just type the first letters and press the TAB key (auto completion).

[jamba77]

ok, thanks.

I found another thread an tried this : on boot I typed /mach_kernel.bak -f -v and I got into safe mode.

then I installed my old kernel (950Voodoo). on the next boot it worked, I mostly use OS86Tools.

[oldnapalm]

Also check this topic

http://www.insanelymac.com/forum/index.php?showtopic=148566

some kexts must match kernel version.

[Beerkex'd]

Or do it the easy way - match the kernel to the extensions instead. Install a 9.7.0 Voodoo kernel:

 

http://www.insanelymac.com/forum/index.php?showtopic=209192

 

(if you just replaced the kernel and didn't actually update to 10.5.7 just ignore this)