Red Hat Bugzilla – Bug 441214
Unable to start any of the system-config tools after changing hostname (xauth problem)
Last modified: 2009-01-09 01:20:42 EST
Description of problem:
After changing hostname with system-config-network, I can't start any of the
graphical system-config tools anymore. Neither can I start pup.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
(all commands as root)
1. Start system-config-network
2. Change hostname in the DNS tab.
3. Press save and then close system-config-network (don't restart the network
4. Try to start system-config-network again.
No protocol specified
ERROR: Unable to initialize graphical environment. Most likely cause of failure
is that the tool was not run using a graphical environment. Please either start
your graphical user interface or set your DISPLAY variable.
system-config-network should start as before.
# echo $DISPLAY
The problem seems to be that _gtk.init_check() fails because of some
authentication issues against X:
This is xauth list after I've changed hostname from apollo2 to apollo4:
# xauth list
apollo2/unix:0 MIT-MAGIC-COOKIE-1 542532c63e0effe0d5a6bcc06784de23
To be able to start the system-config tools again, I did:
# xauth add apollo4/unix:0 . 542532c63e0effe0d5a6bcc06784de23
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