Problem booting on Mac iBook after installing grub2

[rdh61]

Hi,

Lubuntu 13.10 on Mac iBook G4.

I installed grub2 in order to boot into an older kernel (see this thread). To do this I followed the instructions here.

However, when I start the computer I get this error message:

"Invalid memory access at (code numbers)"

I am then dumped in Open Firmware.

There is a bug describing a similar issue here, and I have applied the suggested work around, but it makes no difference.

I can boot but only by entering Open Firmware and booting from there. Before installing grub it would automatically boot into Lubuntu.

Now I would like either to fix this so that grub loads normally, or failing that, remove grub. Can anybody please help me to do either of these?

Many thanks.

[sffvba[e0rt]

Thread moved to Apple Users.

Perhaps someone here will be able to assist better with this issue...

[rdh61]

I went for the nuclear option and installed fresh, so I can't mark as solved, just no longer in need of help. I won't be trying to install grub again. Thanks.