openssh, X11 connection rejected because of wrong authentication.

[ponder]

I've installed opnssh as per the arch wiki and all is well except for one thing, if I try and open apps as root or with sudo I get the above error.

[xxxx@asterix ~]$ sudo leafpad
[sudo] password for xxxx: 
X11 connection rejected because of wrong authentication.
leafpad: Cannot open display:

Opening it as a normal user works fine. Using Manjaro/Arch

 

[koffiejunkie]

I've not tried to do this (fiddling with remote X) but do you have xauth installed on the server?

 

[Lord Nikon6]

Have you tried loging in as root, then try opening the app? Arch should allow root login.

 

[ponder]

I've not tried to do this (fiddling with remote X) but do you have xauth installed on the server?

Yes I have it installed.

Have you tried loging in as root, then try opening the app? Arch should allow root login.

No. I have root login disabled via ssh. I had this working before but did a fresh install on my laptop & desktop recently.

 

[milomak]

i believe i read somewhere that ssh now does not carry x authority to a secondary user. so it only allows x forwarding for the user you logged in as.

i suspect you should be able to verify this through a google search.

 

[ponder]

i believe i read somewhere that ssh now does not carry x authority to a secondary user. so it only allows x forwarding for the user you logged in as.

i suspect you should be able to verify this through a google search.

Yes that is correct but there is a very simple 'workaround' for it, I did it before but for the hell of me I can't remember what I did.

 

[Nod]

Try to execute "xhost +leafpad", before changing to that user "leafpad". If this does not work, then try this