I have tried to run partitionmanager on both testing and unstable
systems. The permissions issue can be fixed with a policy file in
/usr/share/polkit-1/actions/ and subsequently open it with
pkexec partitionmanager
But partitionmanager has other problems. After attempting to start with
pkexec it gives this message:
"pkexec partitionmanager qt.qpa.screen: QXcbConnection: Could not
connect to display Could not connect to any X display."
Defining a display makes no difference.
I've been advised not to run it with "su -c" but tried it as a test and
it shows different errors :
"No support tools were found for file systems currently present on hard
disks in this computer:
Partition
File System
Support Tools
URL
/dev/sda3
linuxswap
util-linux
http://www.kernel.org/pub/linux/utils/util-linux-ng/
/dev/sda6
ext4
e2fsprogs
http://e2fsprogs.sf.net
/dev/sdb3
ext4
e2fsprogs
http://e2fsprogs.sf.net
/dev/sdd3
ext3
e2fsprogs
http://e2fsprogs.sf.net
As long as the support tools for these file systems are not installed
you will not be able to modify them.
You should find packages with these support tools in your distribution's
package manager."
Both those packages are installed, of course.
Also discussed at http://forums.debian.net/viewtopic.php?f=6&t=141315