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I always see the low-graphics mode error and have tried several solutions (links below) but in vain. [intel graphics, Ubuntu 14.04 running on a dual boot with windows7]

How to fix "The system is running in low-graphics mode" error?

How to fix "The system is running in low-graphics mode" error?

And finally to try this http://linuxg.net/fix-error-the-system-is-runnig-in-low-graphic-mode/ i don't see the lightdm.conf file.

I tried to reinstall lightdm and when I do it I don't find the file /etc/lightdm/lightdm.conf. Its just not there at all.

The logs: /var/log/lightdm/lightdm.log and /var/log/lightdm/x-0-greeter.log

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user2729084
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1 Answers1

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The Unity greeter is not starting up. From /var/log/x-0-greeter.log:

/usr/sbin/unity-greeter: symbol lookup error: /usr/lib/x86_64-linux-gnu/libido3-0.1.so.0: undefined symbol: ubuntu_menu_item_factory_get_type

You could try with another greeter, or another Display Manager. For the first option, try:

sudo apt-get install lightdm-gtk-greeter

Just installing it should set it as the default. You can force it to be the default:

sudo tee /usr/share/lightdm/lightdm.conf.d/99-gtk-greeter.conf <<EOF
[SeatDefaults]
greeter-session=lightdm-greeter
EOF
sudo service lightdm restart

This should let LightDM start up if the problem is solely with the Unity greeter.

Installing GTK3 and GLib from source will cause problems, since Ubuntu applies patches to them (here's a similar instance where a patch wasn't applied in a PPA). If you wish to install higher versions of these, look for PPAs, like the GNOME3 PPAs (Main, staging).

muru
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