Hi Andreas,

On 05/08/2018 05:40, Andreas Henriksson wrote:

$ xhost +si:localuser:temp
$ su - temp

You are right that the old su would copy over DISPLAY and XAUTHORITY
environment variables, even when you tell it to give you a new
clean environment.

probably this modification must be written in the changelog as an important change.

$ firefox &
Error: GDK_BACKEND does not match available displays

The error message is a bit misleading. Please just try running this
instead:

DISPLAY=:0 firefox &

thanks, this work :-)

strange, one of the first things that I have done was:
export DISPLAY=:0

probably I have mistake writing something :-(
... looking the history I found that I don't have write "export" :-(

Please feel free to submit a merge request with a util-linux.NEWS entry
addition mentioning the difference if you can come up with a nice
user-understandable description.

I'm not very good in English.

I think you can close this bug.

thanks for your help
Davide

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