Ubuntu login loop Fix

This is frustrating.

Here is the simple method I followed to fix this issue.

This method also works for 22.04 and higher version

Tested also on Ubuntu 22.04 Focal Fossa recently and it worked.

Here are the Methods I followed along with the worked solution

You can try all these methods Because I'm not sure which one gonna work for you to fix the Ubuntu login loop. Please note that this method will also work for Linux mint login loop, Elementary login loop

Method 1: Fixing Permission of Xauthority

Open tty login with Ctrl+alt+F3 (I'm using tty3)

Enter your username and password, hit enter

and run this command ls -lA
find the line, It should be like this

-rw------- 1 USERNAME USERNAME 57 May 7 21:29 .Xauthority

if it is something different, run this command

chown username:username .Xauthority

Example: ninja is my username

chown ninja:ninja .Xauthority

You can press Alt+→ until you see the login screen.

This mostly fixes this issue, If not try another method below.

Method 2: Moving Xauthority

Press Ctrl+alt+F3 to open tty3 screen

Now type mv .Xauthority .Xauthority.bak

Press Alt+→ until you see the login screen

Try login again, If it's not working try another method below.

Method 3: (✅ Worked for me)

Press Ctrl+alt+F3 to open tty3 screen

Enter your username and password

Now, type startx

It'll open up the system desktop screen

Now, Open the terminal and enter the following command.

sudo dpkg-reconfigure gdm3

Now, Logout and press Alt+→ until you see the login screen.

This will surely work. If it's not working. Follow the below steps.

Method 4: Reinstalling gdm3

Press Ctrl+alt+F3 to open tty3 screen

Enter your username and password, hit enter

Run the below command

sudo apt purge gdm3 and press Enter then y and enter

then

sudo apt install gdm3
sudo apt install ubuntu-desktop-minimal

Now,

startx

This will open up the home screen. (If the touchpad on your laptop is not working. Don't panic. Open Settings, under the mouse, enable Tap to Click)

Now open the terminal and type the following command

sudo dpkg-reconfigure gdm3

Now, logout and press Alt+→ until you see the login screen.

Mostly this will fix the issue. Otherwise, follow the below method.

Method 5: Fix temp directory permission

Run this command in tty

sudo chmod a+wt /tmp

That's it. One of these methods will surely fix this issue.

I hope is method helped you to fix Ubuntu Login Loop. If you still have issues. Feel free to write a comment.

Please note that this method also works for fixing the Ubuntu login loop in 20.04, the Ubuntu login loop in 21.04, and ubuntu login loop in 21.10

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