[SOLVED] Xmessages Broken

[Atip]

Lately xmessages coming from 'cron' or 'at' are not displayed any longer and I get in my mail box
following:

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Subject: cron for user user /usr/bin/xmessage -display :0.0 message

Body: 

No protocol specified
Error: Can't open display: :0.0

If I give the same command in a terminal xmessage is being displayed.

I rely a lot on 'cron' and 'at' messages to support my aging memory.

What could be broken?

[gapan]

What did you change lately just before this happened? Could it be that your X session is not on :0.0 anymore?

[Atip]

What did you change lately just before this happened? Could it be that your X session is not on :0.0 anymore?

I would not know exactly what I changed. As far as I recall it was only the occasional updates.

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$ echo $DISPLAY
:0.0

So that is alright and the command from a terminal "xmessage -display :0.0 bumbum"
displays correctl with no error message.

I will try to reinstall 'cron' and 'at'

[Atip]

I reinstalled cron and 'at'. Now 'at' is working again.
xmessages coming from crontab will still not display and give error:

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No protocol specified
Error: Can't open display: :0.0

This is all in Fluxbox. I opened xfce4 in display :2.0 and get same error message for this display :2.0.

What is this "No protocol specified" all of a sudden? Never had this. I have some of my xmessage commands in crontab
for more than 10 years.

Again to mention xmessage is working properly from terminal command line as will as in program scripts.

[Shador]

Try setting up appropriate access to your display with xhost/xauth. Have a look at their man pages.

[Atip]

Try setting up appropriate access to your display with xhost/xauth. Have a look at their man pages.

Thanks for the hint.

Deleted ~/.Xauthority, went into init 2, started X, xmessage in crontab working. Back to init 4,
xmessage in crontab still working.

I hate gremlins.