Red Hat Bugzilla – Bug 500394
KDE Lock Desktop does not work for more than one user in the same machine
Last modified: 2012-06-20 11:59:35 EDT
Description of problem:
If more than one user is using a KDE desktop on the same machine (using XDMCP for instance) then only one of them can lock his desktop at the time.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Use XDMCP to establish two sessions to the same RHEL4 machine.
2. Open a KDE session with a different user account on each of them.
3. Lock the desktop on the first machine.
4. Try to lock the desktop on the second machine.
I will not lock the desktop on the second machine while the first machine is locked.
It should lock the desktop on the second machine, even though the first one is already locked.
This problem is due to the /usr/bin/kdesktop_lock script, that uses "ps ax" which will list processes for all users (not only the user running it).
Changing "ps ax ..." into "ps x ..." fixes this problem (as each user will list the kdesktop_lock.bin for only its own user.
This is what the first line of the script should read:
LIST=`ps x --format "%p:%a" | grep "$0.bin" | grep -v grep | cut -d : -f 1 | tail -n +1`
This problem also affects KDE in CentOS 5.3.
Even with this fix, there is a problem if the user has two simultaneous sessions to the same server. I have that situation with users that have one XDMCP session at the office and one NX session at home.
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