Invalid MIT-MAGIC-COOKIE-1 keyError: Can't open display: localhost:33.0

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I've read all the other threads I found on this issue, but none were useful to me.

I have a remote machine with several accounts. All the accounts access this machine by ssh -X user@machine.domain and their password. All the accounts succeed to execute X commands like xclock but one.

I can export my Magic-cookie to this account with "xauth add", and the X works. It seems to me a configuration issue.

I've tried removing the .Xauthority file. No joy. I'm not executing the xhost + as it is not required for the other accounts to work. It is not a drivers issue as it works for the other accounts

Any suggestion? Thanks.


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