I have ubuntu 14.04 on my laptop.
Model : ideapad z50-70 lenovo
Cpu/Gpu : i7 4510u / Geforce 840m 4GB
I am trying to install cuda c 7.5 (although same problem occurs in cuda 7.0)
When i switch off my lightdm and then start it, it working normally.
But when i switch it off and run the .run provided on the download page, and then start lightdm, i get stuck in the login screen.
I am able to login through text console but i login from gui interface, then the login screen appears again.
How can i fix this ?
I searched the internet and found that a lot of people are facing same problem and other people suggest to remove nvidia driver. I cannot do this as I want to work on cuda programming.