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WARNING **: Could not open X display No protocol specified in almost all apps - f27

asked 2018-04-08 07:36:34 -0500

B4rt gravatar image

Hi all.

I bought a Precision 5520 and installed Fedora 27 on it. I had a problem with the graphic card (Intel Graphic card 630). Fedora wasn't recognizing it... it was working but the performance was REALLY slow.

After lots of research, I finally found the answer... go to the grub configuration and erase the nomodeset and voiala ! Fedora recognize my gcard and my life started to run much better...

Althought, for my bad luck... lots of apps stoped to work ! When I run then on shell, I have the error:

* (vmware-modconfig:20991): WARNING *: Could not open X display No protocol specified

(vmware-modconfig:20991): Gtk-WARNING **: cannot open display: :0

VMware example !

Please, anyone has any clues what is going on? How to solve it? I am available to give more information if it is necessary.


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Wayland does not allow you to run graphical applications as root user. You may want to run a XOrg session or use other workarounds. The topic has been covered many times in this forum. Let us know if you can't find the information you need.

florian gravatar imageflorian ( 2018-04-08 16:08:14 -0500 )edit

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answered 2018-04-10 01:17:21 -0500

B4rt gravatar image


yep, I realized that I am running Wayland and now most of all applications are running cause I changed some configurations.

Looking forward to seeing Wayland improvements. Laptop monitor is 4k, and when I connect a monitor, Wayland can keep different scales, although some applications when in the monitor screen the scale is fine, but if I move to the 4k screen, the window become very small. This happens only with some applications

Many thanks !

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Asked: 2018-04-08 07:36:34 -0500

Seen: 487 times

Last updated: Apr 08 '18