X broken as drmSetMaster failed


That was a bad evening, I upgraded my debian box and X failed to start throwing below errors.

6017.269] (EE) modeset(0): drmSetMaster failed: Permission denied
[ 6017.269] (EE)
Fatal server error:
[ 6017.269] (EE) AddScreen/ScreenInit failed for driver 0

After spending hours I came to know latest X can’t run without root privilege now. We need to have legacy package of xserver to run X as non root user

sudo apt-get install xserver-xorg-legacy

then the wrapper config, so edit/create  /etc/X11/Xwrapper.config  to have the below two lines only.


X is back, What a relief .


One response »

  1. Wow! Just wow! Just upgraded my Nvidia driver on Ubuntu 18.10 and got stuck in a login loop with the same exact error.

    Holy cows it indeed needed root, thanks for sharing man!!! It fixed the issue! Awesooome!!!


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s