I have installed above update and after that system cannot boot. it displayed the "e" logo and after that everything goes black again, does anyone know how to fix this? already tried recovery mode. nothing happened. Thanks os: elementary OS freya
The latest version of Ubuntu switched to an open-source Nvidia driver, which causes problems for some people.
You may be able to solve the problem by booting into recovery mode and installing the proprietary Nvidia drivers.
To start, we'll boot into recovery mode, enable networking, and get to a terminal prompt:
- Restart your computer. If you dual boot, grub will appear. Otherwise, hold shift while your computer boots to open grub.
- From the options that appear in grub, choose recovery mode. The recovery mode option will look something like this:
elementary OS, with Linux [version details] (Recovery mode).
- The system will boot into recovery mode. After a few moments, the recovery mode menu will appear.
- Choose "enable networking". Answer "yes" at the dialog that appears.
- Choose "drop to root shell prompt".
At this point, you should have a text prompt where you can download and install the driver.
Next, we'll install the Nvidia drivers. I don't have an Nvidia chip on my computer, so I've copied the following steps from this Ask Ubuntu question.
sudo apt-get purge nvidia-*
sudo add-apt-repository ppa:graphics-drivers/ppaand then
sudo apt-get update.
sudo apt-get install nvidia-364.
OK. I can confirm the other answer is actually working.
with one exception.
I wasn't able to start my grub, but I was able to ctrl + alt + F1 into my terminal, where I have fully running Freya, just without a front end.
NOTE This is only a solution if you previously installed proprietary NVidia driver, and you will need to use your Nvidia installer to recover.
to get your front end, steps are:
wait until your screen is blacked out, hit ctrl+alt+F1 into terminal.
in terminal check if you can turn off you x server by:
service lightdm stop
if it says unknown instance, then you ignore it for the moment.
- now get your Nvidia installer to do the following:
~$: ./NVIDIA-Linux-x86_64-361.45.11.run --uninstall
NOTE if you did what Ryan (the other answer) said, using apt-get purge to remove it, you will still need to do this step.
now restart and boot into terminal again.
~$: chmod +x NVIDIA-Linux-x86_64-361.45.11.run
~$: sudo ./NVIDIA-Linux-x86_64-361.45.11.run
follow the instruction to complete NVIDIA installation.
once complete you can run:
~$: service lightdm start
you should now see your GUI back.