Comment 30 for bug 1371159

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Albert (sapristi) wrote : Re: [MacBookPro11,1] Unable to suspend in ubuntu 14.04

To add here that the only way I know to go back to a working multi-CPU ubuntu is to remove the 3.18 kernel and let the default be the prior 3.13.43. So I "sudo apt-get remove" the 3.18, and at the end of the command, which executes successfully, I see:

The link /vmlinuz is a damaged link
Removing symbolic link vmlinuz
 you may need to re-run your boot loader[grub]
The link /initrd.img is a damaged link
Removing symbolic link initrd.img
 you may need to re-run your boot loader[grub]

So I re-run "sudo update-grub", which runs successfully and without error messages.

Perhaps this was part of the boot issue.