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I recently installed 16.04 on a pen drive and it keeps on coming up with a running in low graphics mode pop up and wont let me do anything. I'm not the greatest with terminal. help would be appreciated.

EDIT: I also cannot get to grub menu when I hold shift during boot it takes me to what looks like a terminal. Also don't believe I have a user name or password.

TB94
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    To fix this, please follow the guide [How to fix “The system is running in low-graphics mode” error?](http://askubuntu.com/questions/141606/how-to-fix-the-system-is-running-in-low-graphics-mode-error) –  May 02 '16 at 03:38
  • At the boot screen where you choose "Try Ubuntu", please press F6, which will allow you to add boot options. Add `nomodeset` to the end of the options, and then boot into "Try Ubuntu" as usual. Does that help? –  May 02 '16 at 03:48
  • F6 doesnt seem to do anything :/, I am running the pen drive on a dell inspiron 1122 in case that matters. – TB94 May 02 '16 at 07:14

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I faced the same infamous "Low graphics mode" issue after upgrading to 16.04 out of my curiosity from 14.* LTS. I tried installing/uninstalling graphics drivers (open source/official), configuring/reconfiguring various desktop managers, trying various previous kernels, installing/reinstalling GL/mesa drivers via apt-get, removing ~/.*authority, creating xorg.conf, changing/fixing/blacklisting graphics kernel modules and so on, but nothing worked

Finally, I saw that /etc/lightdm/lightdm.conf didn't have any greeter-session at all. So, added greeter-session=unity-greeter and then got the lightdm login page instead of flickering black screen saying "System program problem..." dialog box appearing and disappearing every few seconds.

Then, I got into another infamous issue - login loop. For this, I switched the desktop environment to GNOME metacity as none of the other worked - Ubuntu, Unity8 Mir, Gnome Compiz, etc. Finally, I was able to login, but "system settings" was having issues - unity-control-center and gnome-control-center were crashing with SegFault.

So, I installed the latest built mesa driver from mesa-12.* sources (only half built as there was some llvm error but installed the so far stuff anyway which included the intel drivers as I saw), and at last "system settings" opened successfully.

Zanna
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