I upgraded software couple days ago. Now I have a problem with my desktop. I'm attaching a print screen to show what I mean.
OK, this could be your answer,
After logging in to Ubuntu, Click on the System Settings icon on the Launch Bar and Click on the Software and Updates icon.
Wait for that window to appear, it will look something like this:
Select the latest driver that you want to use. as you can see I chose the 313-updates (proprietary) driver, whilst yours is probably set to Using X.Org X server - Nouveau display driver. Click on the Apply Changes button and wait for the drivers to be installed or activated, then click close.
Next, start Terminal with Ctrl+Alt+T and type in the following command:
When that completes, enter the following command:
This will bring up the NVIDIA settings tool
Hope this helps.
I have found this solution which may help:
When you reboot your computer, as it is booting press esc to stop it for a while, and then press F6 to turn on
I have no idea what this does, bit has worked for some Asus machines
As this problem started after an update, you may have to do the following: (see here)
Regression bugs that freeze the system reliably are ironically the most productive to solve.
If you updated your system and it started to freeze, start reverting package updates backwards until the freezes stop occurring.
If it does not freeze, then you now have a "Good" and "Bad" kernel and can proceed with a kernel bisection search to isolate what patch caused the failure.
(Yes, compiling kernels sounds intimidating and time consuming, but stick with it - the process is well documented and it has a very high likelihood of narrowing it to a specific cause!)