Comment 56 for bug 1310023

Hi,
I want to report this because I think the devs can take some conclusions.

Tired with the problem I proceed with a new clean install in my laptop Lenovo Ideapad S410p Nvidia GT 720M (format "/" and "/boot" keep my "/home" the same) after the process I run the apt-get update and install new packages, after I put ON Cannonical partners repos and keep OFF "trusty-propossed"

Now my Nvidia works perfect! I install nvidia from Ubuntu sources (not xorg-edgers) with this:

mario@mario-IdeaPad-S410p:~$ sudo apt-get install nvidia-331 nvidia-settings nvidia-prime

mario@mario-IdeaPad-S410p:~$ uname -a
Linux mario-IdeaPad-S410p 3.13.0-30-generic #54-Ubuntu SMP Mon Jun 9 22:45:01 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

Nvidia settings works fine show me full info

Previous installation: I can see some problems in the normal works for Thunderbird and Firefox, lags for the hole graphic system, some screens run slowly and suddenly black screen for a windows minimized like you can see in the attachment (with Ctrl+tab I can restore normal work for it) .

Now all looks very fine no lags normal behavior, TB and FF work very smooth, so for me the new clean install fixed all.
Let me know if you need more info.