[Solved] Ubuntu Warning: The system is running in low-graphics mode

After checking the Internet for a number of solutions, I finally found one that fits my problem here, cited below.

I have recently received a similar issue with myPangolin Performance laptop. The folks at System 76 told me to do the following:

Click Okay and then select the option to get a terminal. (alternatively you can press ctr+alt+f1 to bring up another tty)

sudo chown lightdm:lightdm -R /var/lib/lightdm
sudo chown avahi-autoipd:avahi-autoipd -R /var/lib/avahi-autoipd
sudo chown colord:colord -R /var/lib/colord
sudo reboot

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Attachment: there is another way to install network card driver on the Internet

# For the latest Nvidia binary drivers.

sudo add-apt-repository ppa:ubuntu-x-swat/x-updates
sudo apt-get update
sudo apt-get install nvidia-current nvidia-current-modaliases nvidia-settings

# For the latest ATI/AMD binary drivers.

sudo add-apt-repository ppa:ubuntu-x-swat/x-updates
sudo apt-get update
sudo apt-get install fglrx

I installed the NVIDIA driver. After restarting, I entered the login interface. After entering the user name and password, I still couldn’t enter the desktop. I kept circulating in the login interface. The solution is as follows:

alternatively you can press ctr+alt+f1 to bring up another tty

To uninstall NVIDIA driver:

sudo apt-get remove --purge nvidia-*
sudo apt-get install ubuntu-desktop
sudo rm /etc/X11/xorg.conf
echo 'nouveau' | sudo tee -a /etc/modules
#restart
sudo reboot

After restart

Reason search:

When there is a circular login problem, you can enter the shell according to the above method and find the. Xsession errors file in the home directory

# cd home check.xsession-errors
cd ~
ls -a
vi .xsession-errors

Then you can see the information in the log, according to the information in the log to Baidu, maybe you can solve the problem of driver installation

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