KDiskFree and /bin/df informations are differents

[trotosa]

For example, /bin/df returns :

/dev/sda11 51343840 19397544 29308472 40% /
/dev/sda8 31195968 7279616 22262032 25% /install

With KDiskfree, I see 43% for sda11 and 29% for sda8.

df and partition manager (KPMcore) gives the same results.

[trotosa (unkonitoxx)]

kubuntu 18.04 beta 1

[trotosa (unkonitoxx)]

I have done some other tests with filelight.
Filelight gives me the same result that df.

KDiskfree gives always a disk occupation ratio from 3 to 4 % more.

[trotosa (unkonitoxx)]

Nobody else ?