Question

1

Ubuntu 11.10 is falling back to Unity 2D. How to get back to Unity 3D?

rated 0 times [ 1] [ 0] / answers: 1 / hits: 6242 / 3 Years ago, sat, may 8, 2021, 11:22:11

It happened some minutes ago when I plugged my secondary monitor and my graphical interface simply crashed. So I had to restart my session. Since the crash Ubuntu insists to use Unity2D fall back instead of the default one. I used to plug the secondary monitor everyday when at home and nothing bad happened before.

This 2D version of the GUI is ugly and has a lot of problems. How can I go back to Unity 3D GUI?

update

It seems somehow I lost my opengl support (driver issues).

$ glxinfo



name of display: :0.0

Xlib:  extension "GLX" missing on display ":0.0".

Xlib:  extension "GLX" missing on display ":0.0".

Xlib:  extension "GLX" missing on display ":0.0".

Xlib:  extension "GLX" missing on display ":0.0".

Xlib:  extension "GLX" missing on display ":0.0".

Error: couldn't find RGB GLX visual or fbconfig



Xlib:  extension "GLX" missing on display ":0.0".

Xlib:  extension "GLX" missing on display ":0.0".

Xlib:  extension "GLX" missing on display ":0.0".

Xlib:  extension "GLX" missing on display ":0.0".

Xlib:  extension "GLX" missing on display ":0.0".

Xlib:  extension "GLX" missing on display ":0.0".

Xlib:  extension "GLX" missing on display ":0.0".

And:

$ glxgears

Xlib:  extension "GLX" missing on display ":0.0".

Error: couldn't get an RGB, Double-buffered visual

update

$ lspci | grep VGA



00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

How can I revert things and go back to the right driver?

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fishutt

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answered 3 Years ago ipentainer · Accepted Answer

Finally solved the problem here! Like @MichaelK said:

[...] Most likely the driver switched to another one and you lost
opengl support [...] Well update information on your graphics hardware and driver as well.

So the way I found to reset things was to just purge and install xserver-xorg, after that everything went back to normal:

$ sudo apt-get purge xserver-xorg

$ sudo apt-get install xserver-xorg xserver-xorg-video-all

$ sudo reboot

Voila! Hope it helps.

ps: The only bad thing now is that every time I plug a secondary monitor on my computer (specially when showing Ubuntu to someone) I have to cross my fingers secretly. This driver switching behavior from Ubuntu is no good man ¬¬