When I try to launch KDE Partition Manager a KDE su dialogue pops up prompting me for root's password:

The action you requested needs root priviliges. Please enter root's passoword below or click Ignore to continue with your current privileges.

Command: KDE_FULL_SESSION=true XDG_RUNTIME_DIR=/run/usr/1000 DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus /usr/bin/partitionmanager --dontsu

When I enter my user password, the dialogue box reappears with:

Permission denied. Possibly incorrect password, please try again. On some systems, you need to be in a special group (often: wheel) to use this program.

I've checked that my user is a part of the wheel group. And for terminal commands requiring admin privileges sudo + [myuserpassword] works as expected.

How can I launch KDE Partition Manager with admin privileges?

I'm running the KDE spin of Fedora 28. I created a user but have no root password set.

  • 2
    You may want to re-configure kdesu to use sudo instead of su: see for example ArchWiki: kdesu – steeldriver Aug 18 '18 at 13:13
  • @steeldriver Thanks this worked, if you submit it as an answer I'll accept. – Bprodz Aug 18 '18 at 14:15

The problem arises because kdesu tries to use su even if you haven't set a root password.

kdesu can be configured to use sudo instead of su. You need to create a file in ~/.config/kdesurc with the contents:


As per the instructions on the arch wiki. Link. Credit to @steeldriver for the answer.

| improve this answer | |
sudo /usr/bin/partitionmanager
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  • 2
    I always thought that running GUI programs with sudo was discouraged? – Bprodz Aug 18 '18 at 14:14
  • 2
    Don't run partitionmanager like this. Things might break if you use sudo (note, I am the maintainer of KDE Partition Manager). – Andrius Štikonas Aug 27 '18 at 11:47
  • Okay, that's fine, but then what to do instead? I also can't launch it without sudo. – Attila Jan 4 '19 at 23:07
  • @Attila You can configure kdesu to use sudo instead of su by following the instructions on this page wiki.archlinux.org/index.php/sudo#kdesu – Bprodz Jan 5 '19 at 13:34

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