I would suggest you to take a look at the answers on these questions, which may be helpful for you to find a clue on where to start.
Posted here for your convenience:
The Ubuntu Wiki related to Troubleshooting BlankScreen provides useful
information about why this problem occurs and how to fix it, which in
my case solved my problem that was giving blank screen at the boot and
I couldn't even see the Login Screen.
Related to what you refer about your issue, there is a part that reads
just under "Non Symptoms":
If it occurs after entering your password on the login page, you have
some different class of issue, such as an issue with 3D / DRM. Try
disabling compiz (
sudo chmod a-x /usr/bin/compiz), logging in as a
different user, or turning off DRI.
However, I suggest you take a look at that document and check what of
these can give you a clue on where to start for you to fix it.
Also posted here for your convenience, even when it refers to the same thing.
The Troubleshooting Blank Screen at Ubuntu Wiki provides enough
information about how to manage these issues, which I can't say what
would fit your needs but take a look at that document in order to get
a clue on where to start.
Quoted from the site:
If you see a screen of a different color (brown, white,
corruption, etc.) you are seeing a different class of graphics bug.
Obtaining register dumps (see below) may still be of value however.
In my case what solved my problem was to edit the GRUB List at
/boot/grub/grub.cfg and remove the "
splash" parameter of each
GRUB's entry, which may be different in your case as mentioned in the
To check this, in the grub menu edit the kernel line and remove
'splash' from the end of the line, and boot. If that solves the
you can remove it from your /boot/grub/menu.lst as a workaround.
NOTE: even when this document refers to the menu.lst file, that file
doesn't exist inside my
/boot/grub folder, which is
grub.cfg in my
case. (I can't say why but no need to comment about it)
Also Check the Analysis techniques section of the page in order to
gather further information related to your specific issue and let us
know, somebody may have more experience with your specific problem
than I do.
Keep us posted on your issue.
P.S. You can edit your
/boot/grub/grub.cfg using a live session
CD/DVD but make sure you always keep a backup of your original file.
Somehow it seems that people is leading to this kind of issue, I can't say for sure but I guess it is caused by an update or something related to the installation of a software. In my case it was after updating my system and I solved as mentioned here: System not reaching login on GUI