Open/close GParted permanently changes system details
Start Linux Mint 19, open "Disks" from Accessories (3.28.3, UDisks 2.7.6). On my sda there are sda1 (Ext2) an an extended (sda2) with swap and other (Ext4) partitions shown. Everything is consistent in Disks, OK:
```
fdisk -l /dev/sda
Disk /dev/sda: 465,8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x12240f8d
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 326371327 326369280 155,6G 83 Linux
/dev/sda2 326375422 748257279 421881858 201,2G 5 Extended
/dev/sda5 326375424 334757887 8382464 4G 82 Linux swap / Solaris
/dev/sda6 334761984 544059391 209297408 99,8G 83 Linux
/dev/sda7 544061440 583120895 39059456 18,6G 83 Linux
/dev/sda8 583122944 590934015 7811072 3,7G 82 Linux swap / Solaris
/dev/sda9 590936064 748257279 157321216 75G 83 Linux
```
Now additionally open GParted (0.30.0) and watch the "Disks" window change with authentication [1]:
Partition 2 now shows 0.0 KBUnknown, rest is "Free Space".
Close GParted, the problem remains, it's persistent until a Linux restart. I didn't try to change anything in Disks in the "wrong" state, but it may fail badly.
Disks is only an indicator for something being wrong: GParted touches but doesn't clean the table when leaving. I can't trust GParted because starting it may have unknown consequences even days later.
Parted itself doesn't seem to trigger the issue.
This may go back to: https://github.com/storaged-project/udisks/issues/425 and esp. https://bugs.freedesktop.org/show_bug.cgi?id=98867 (check the attachment / [details], very similar)
[1] Why authenticate at this moment? Just to check partitions it's dangerous, unneeded, but this may be part of the issue.