Yesterday I upgraded my system with
sudo apt-get upgrade. I upgrade on a regular basis so not a lot of packages were installed and i don't know which ones this time. But after that i booted my computer and he hangs on "Checking battery state".
I googled a bit and i could manage to start Unity, how:
crtl+alt+f1 to open a terminal startx (this starts the graphical stuff) once that was started i opened a terminal with ctrl+alt+T and then the command: unity &disown
Now everything works as normal. But this is annoying, and how can this be fixed. After googling a while i guess that it has something to with my video card.
~$ fglrxinfo display: :0 screen: 0 OpenGL vendor string: Advanced Micro Devices, Inc. OpenGL renderer string: AMD Radeon HD 6400M Series OpenGL version string: 4.2.11631 Compatibility Profile Context
My video card: Radeon 6470M
I also tried to download the driver from http://www2.ati.com/drivers/linux/amd-driver-installer-12-4-x86.x86_64.run and followed these instructions https://help.ubuntu.com/community/BinaryDriverHowto/ATI but my system still hangs at boottime.
What do i need to do to get my system boot as normal again. If you need additional info let me know.
Edit: somehow Ubuntu can't work anymore with the proprietary drivers from Ati for Radeon HD 6400M Series. I reinstalled Ubuntu and everything works fine (at first sight), but i want to install the proprietary drives. Now the problem is that i can't connect a second screen to my laptop anymore ... therefore i need the proprietary driver