These errors occur while starting Ubuntu. I am dual booting Windows 8.1 with Ubuntu.
kernel panic – not syncing : fatal exception in interrupt.
shutting down cpus with NMI
drm_kms_helper : panic occurred, switching back to text console.
Nothing happens and Ubuntu freezes.
Best Answer
This was probably caused by fixes and features backported from newer kernels.
In GRUB menu, select Advanced options for Ubuntu, choose the last kernel that worked (not recovery mode).
Now you can:
Easiest way to install new kernel is to download it from kernel.ubuntu.com and install it using
dpkg
.First, select the version you want (preferably the newest non-rc one,
utopic
kernels will work for 14.04 too), then download 3 files:Replace architecture with i386 if you use 32-bit Ubuntu, or amd64 if you use 64-bit one (it has nothing to do with CPU manufacturer!).
Move these files to separate directory, open your terminal,
cd
to that directory and then run this command:When
dpkg
finishes, you can reboot, and ensure that you are running the kernel you've installed:Remember, you'll have to update kernel manually now, because Software Updates will only install 3.13 patches, as the kernel version never changes after Ubuntu release.
If it still doesn't work, uninstall the kernel you've installed with
Replace 3.13.0-24 with version you want to uninstall (or press Tab key to list installed ones). Second command may throw an error as there's no
linux-image-extra
for some kernels.PS: Please, follow these instructions to make a bug report for that faulty kernel, so they can fix it for others :)