Stuck in login loop after installing AMD graphics driver

Question

Installed AMD graphics driver form here. But after reboot, I am unable to login. It keeps comming back to login screen when I type password and hit enter. I can't even login to guest user.

I have tried every thing form this solution but nothing worked for me. I have tried this

chown username:username .Xauthority  
sudo chmod a+wt /tmp
dpkg-reconfigure lightdm
sudo service lightdm restart

File also .profile seems fine.

I am using Ubuntu 16.04 LTS, Linux Kernel version 4.xx

Please suggest what to do as I can't get my work done without Ubuntu.

Thanks in advance.

Solution 1

Your GPU is not supported by the amdgpu driver. You should uninstall the driver you installed from AMD.

You need to either use the open source radeon driver included with Ubuntu, or downgrade to Ubuntu 14.04 (no newer than the 14.04.4 point release) and use the fglrx proprietary driver if you need to use it rather than the open source radeon driver.

Solution 2

You will have to remove the drivers that you have installed since they are not compatible. In the tty screen Ctrl+Alt+F3 login and uninstall the default graphics on your device:

amdgpu-pro-uninstall

reboot your system and use the open source radeon driver for a temporary fix.

---

follow this for a permanent fix: https://support.amd.com/en-us/kb-articles/Pages/AMDGPU-PRO-Install.aspx

if the problem still persists, your graphic card might be damaged.

Comments

[Pilot6]

What is the graphics adapter?

[Rahul]

AMD Radeon R7. Is this you are looking for or you are asking for something else?

[dobey]

You need to be more specific than R7. Only some R7 GPUs are supported by the amdgpu driver.

[Rahul]

@dobey AMD Radeon R7 M265. Is there any command to show more details than this or this is sufficient?

[Rahul]

How did you check if my GPU is not supported by amdgpu driver? How do I uninstall the driver as i can't find this script amdgpu-pro-uninstall in /tmp/amdgpu-pro-driver? any link to radeon driver included with ubuntu?

[dobey]

The page on AMD's site which links to the various download pages shows you what cards are and are not supported by the different drivers. The radeon driver is included by default in Ubuntu. It's what your laptop would have been using before you installed the amdgpu-pro stuff. You will need to probably unpack the package again and then run the uninstall script. As /tmp is a memory backed filesystem, it is emptied at every reboot.

[karel]

You have to change directories first to the directory that contains amdgpu-pro-uninstall. Source: How-To Install/Uninstall AMD Radeon Software AMDGPU-PRO Driver for Linux on an Ubuntu System