Hi. I don't want a solution, only to understand what's happening, and where to find the explanation.
I'm using CentOS 7, despite I was an Slackware and Gentoo user (for more than 10 years). After I connect into a VPN I get the message (when I'm trying to open X apps): *Invalid MIT-MAGIC-COOKIE-1 key* *(geeqie:12853): Gtk-WARNING **: cannot open display: :0* That's a very ordinary and common message for Linux users, I know. Merging Xauthorit or exporting DISPLAY variable, using all hostnames/IP as possible, doesn't fix the problem. Even doing a SSH to localhost (with X11 forward enabled) doesn't work. If I execute xhost + I still get the error: *Invalid MIT-MAGIC-COOKIE-1 keyxhost: unable to open display ":0"* So, I only want to understand how Xorg treat the relation among hostname, IP, DISPLAY, users etc. For now, the only way I can solve the problem is to exit X and start again, what is a kind of nightmare in my daily work. Best regards Alexander
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