/etc/X11/xorg.conf
/var/log/Xorg.0.log

(people in #ubuntu will ask to see these files)

My thread: http://ubuntuforums.org/showthread.php?t=2263064&p=13217963#post13217963

------------------------------------------------

Basic problem description:

Stuck in Unity 2D. I can't use Unity 3D. Also, lots of programs have OpenGL errors.

When I select Unity 3D at the login screen, it starts Unity 2D.

------------------------------------------------

General system information:

Ubuntu 12.04 LTS

Graphics card (from lspci -v):

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
        Subsystem: Micro-Star International Co., Ltd. Device 7788
        Flags: bus master, fast devsel, latency 0, IRQ 42
        Memory at f7800000 (64-bit, non-prefetchable) [size=4M]
        Memory at e0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at f000 [size=64]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915

------------------------------------------------

tty (ctrl+alt+f1)

Your current hardware enablement stack (HWE) is no longer supported since 2014-08-07. Security updates for critical parts (kernel and graphics stack) of your system are no longer available.

For more information, please see:
http://wiki.ubuntu.com/1204_HWE_EOL

There is a graphics stack installed on this system. An upgrade to a supported (or no longer supported) configuration will become available on 2014-07-16 and can be invoked by running 'update-manager' in the Dash.

------------------------------------------------

STEAM

openGL GLX extension not supported by display

PYTHON PYGAME

>>> pygame.display.set_mode((640, 480), pygame.HWSURFACE|pygame.OPENGL|pygame.DOUBLEBUF)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
pygame.error: Couldn't find matching GLX visual

MEDNAFEN

Couldn't find matching GLX visual

NETFLIX-DESKTOP

Compositing is not available, please enable compositing support and relaunch Netflix Desktop.

ADDITIONAL DRIVERS

No proprietary drivers are in use on this system.

> Realtek Wireless Lan Driver
   Tested by the Ubuntu developers
   License: Free

FCEUX

Plays for a few seconds, then Segmentation fault
(This didn't happen in Unity 3D)

VIRTUAL BOX

Failed to open a session for the virtual machine Windowcat.
This VM was configured to use 3D acceleration. However, the 3D support of the host is not working properly and the VM cannot be started. To fix this problem, either fix the host 3D support (update the host graphics driver?) or disable 3D acceleration in the VM settings (VERR_NOT_AVAILABLE).

DROPBOX

When computer starts up, Dropbox icon is in the top-left of the screen, on top of the top panel.
Running 'killall dropbox' and then 'dropbox start' puts it with the other notification icons.

DOLPHIN-EMU

Upon trying to run a game: "Failed to initialize video backend!"
Terminal: Xlib:  extension "GLX" missing on display ":0".

MINECRAFT

OpenGL: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.

~~~~~~~~~~
Jan 6 2015
~~~~~~~~~~

Uninstalled mesa-utils
Reinstalled mesa-utils (only effect is to make Nautilus folders stop stacking properly in launcher)
Installed Bumblebee https://wiki.ubuntu.com/Bumblebee
Rebooted - Unity wouldn't load after logging in.
Uninstalled Bumblebee.
Rebooted - Unity loads again.

~~~~~~~~~~
Jan 29 2015 (1:00 AM to 3:00 AM)
~~~~~~~~~~

Install netflix-desktop ("compositing is not available")
Download: https://01.org/linuxgraphics/sites/default/files/downloads/u12.04-downgrade.tar
Extract to Downloads/Intel Downgrade
Mark the file as executable
sudo ./downgrade.sh
sudo apt-get autoremove

reboot - nothing happens (netflix-desktop has the same error)

http://ubuntuhandbook.org/index.php/2013/08/install-update-intel-graphics-driver-from-official-repository/

sudo sh -c 'echo "deb https://download.01.org/gfx/ubuntu/12.04/main Ubuntu 12.04" >> /etc/apt/sources.list.d/intel-graphics.list' (nothing happens)

sudo update-pciids
  > Downloaded daily snapshot dated 2015-01-28 03:15:02

E: Unable to locate package mesa-libgl

http://ubuntuforums.org/showthread.php?t=345177

sudo apt-get update (no problems)
sudo apt-get install build-essential (already the newest version)
sudo apt-get install freeglut3-dev (unable to fetch some archives)
sudo apt-get install freeglut3-dev --fix-missing (success!)
Reboot - still Unity 2D, no apparent changes

~~~~~~~~~~
Feb 1 2015
~~~~~~~~~~

http://askubuntu.com/questions/206283/how-can-i-uninstall-a-nvidia-driver-completely

sudo apt-get remove nvidia-304
sudo apt-get remove nvidia-cg-toolkit (this removed dolphin-emu)
sudo apt-get remove nvidia-settings
sudo apt-get install ubuntu-desktop
Backed up xorg.conf in Documents/Ubuntu + computer/xconf backup 2015-feb-11
sudo rm /etc/X11/xorg.conf
Reboot - Unity doesn't start up.
Put the backup of xorg.conf back in /etc/X11.
Reboot - no change.
sudo apt-get install nvidia-304
Reboot - Unity loads again.

http://ubuntuforums.org/showthread.php?t=1741783

ldd /usr/bin/glxinfo
sudo ldconfig
ldd /usr/bin/glxinfo

Previously: libGL.so.1 => /usr/lib/nvidia-304/libGL.so.1 (0xb75ec000)
Afterward:  libGL.so.1 => /usr/lib/nvidia-304/libGL.so.1 (0xb7674000)

Backed up xorg.conf to Documents/Ubuntu + computer/Feb 2 xorg conf/xorg.conf

sudo apt-get purge nvidia* (The following packages will be REMOVED:
  bumblebee-nvidia* dolphin-emu* nvidia-304* nvidia-cg-toolkit*
  nvidia-common* nvidia-settings* ubuntu-desktop* )

[At this point, the Internet icon froze and became unclickable, and IRC and Firefox couldn't connect, but for some reason I could still install things. So I decided to reinstall and then reboot.]

sudo apt-get install ubuntu-desktop
sudo apt-get install nvidia-304
Reboot - everything seems fine, and the Internet works properly. In tty, a message appeared, but disappeared before I types the whole thing: "CIFS VFS: Autodisabling the user of server inode numbers on \\Router\Snowman(A1). This server doesn't seem to support them properly."

sudo apt-get purge nvidia* (The following packages will be REMOVED:
  nvidia-304* nvidia-common* nvidia-settings* ubuntu-desktop* )
sudo apt-get install --reinstall xserver-xorg-video-intel libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core
sudo dpkg-reconfigure xserver-xorg
sudo update-alternatives --remove gl_conf /usr/lib/nvidia-current/ld.so.conf
Reboot - Unity doesn't load.
sudo apt-get install nvidia-304
Reboot - Unity loads.

~~~~~~~~~~
Feb 3 2015
~~~~~~~~~~
http://ubuntuforums.org/showthread.php?t=2263064&p=13220318#post13220318

sudo apt-get install ppa-purge (already the newest version)
sudo ppa-purge ppa:makson96/mesa

The following extra packages will be installed:
  libllvm3.1
Suggested packages:
  libglide3 libvdpau-doc nvidia-vdpau-driver vdpau-driver
The following NEW packages will be installed:
  libllvm3.1
The following packages will be DOWNGRADED:
  i965-va-driver libegl1-mesa libegl1-mesa-drivers libgbm1 libgl1-mesa-dev
  libgl1-mesa-dri libgl1-mesa-dri-experimental libgl1-mesa-glx libglapi-mesa
  libgles1-mesa libgles2-mesa libglu1-mesa libglu1-mesa-dev libkms1
  libopenvg1-mesa libosmesa6 libva-dev libva-glx1 libva-intel-vaapi-driver
  libva-tpi1 libva-x11-1 libva1 libvdpau-dev libvdpau1 libxatracker1
  linux-firmware mesa-common-dev mesa-utils vainfo xserver-xorg-video-ati
  xserver-xorg-video-fbdev xserver-xorg-video-intel
  xserver-xorg-video-nouveau xserver-xorg-video-radeon
  xserver-xorg-video-vesa

WARNING: The following packages cannot be authenticated!
  libllvm3.1

PPA purged successfully.

sudo apt-get purge nvidia*
Reboot - Unity doesn't load.
sudo apt-get install nvidia-304
Reboot - Unity loads.

~~~~~~~~~~
Apr 24 2015
~~~~~~~~~~

sudo apt-get install build-essential gcc-4.5 g++-4.5 libxi-dev libxmu-dev freeglut3-dev

steam (openGL GLX extension not supported by display)

"This can occur if the user updates nvidia-drivers and does not reinsert the module or reboots." https://github.com/ValveSoftware/steam-for-linux/issues/739

"It means you tried to install the nvidia driver, and it overwrote the open-source version of libglx.so with the proprietary nvidia version, so you need to reinstall the open-source mesa stack." http://ubuntuforums.org/showthread.php?t=1301433

~~~~~~~~~~
Apr 26 2015
~~~~~~~~~~

Rebooted, continual graphics glitches like this: https://dl.dropboxusercontent.com/u/16623407/screenshots/scarycalculator.png

The glitchy parts can be wiped off of buttons by mousing over them.

~~~~~~~~~~
Apr 27 2015
~~~~~~~~~~

Rebooted again, the graphics glitches remain.

Installed ~45 updates, Update Manager wants to reboot.

~~~~~~~~~~
Apr 29 2015
~~~~~~~~~~

Rebooted, graphics glitches still there.

A new glitch appeared where the screen flashes when the computer starts to enter sleep mode.

~~~~~~~~~~
Apr 30 2015
~~~~~~~~~~

Updated Ubuntu.

~~~~~~~~~~
May 12 2015
~~~~~~~~~~

Updated Ubuntu.
	
You don't install OpenGL. Your graphics card either supports it or doesn't. What kind of graphics card are you using? Are you using an integrated card? –  zero298 Feb 13 at 22:57 http://gaming.stackexchange.com/questions/197927/how-do-i-install-opengl-my-graphics-drivers-are-all-installed-and-updated-alon

http://www.overclock.net/t/1432656/resolved-solution-in-post-minecraft-new-launcher-2013-linux-ubuntu-12-10-lwjgl-error-how-to-resolve-resolved