Created attachment 116525 [details]
the output of 'udisksctl dump'

I used Gnome Disks to set my 3 hard drives to spin down after 10 minutes of inactivity. The tool created three files in /etc/udisks2/ named:

MAXTOR-STM3250310AS-6RY0XFMX.conf
SAMSUNG-HD252HJ-S17HJ9CQ716173.conf
WDC-WD1002FAEX-00Z3A0-WD-WCATR8328627.conf

The content of the three files is the same:

# See udisks(8) for the format of this file.

[ATA]
StandbyTimeout=120


The setting is respected across reboots, but if I suspend my computer, after resuming the disks never spin down.

Steps to reproduce:
1. Use Gnome Disks to set the standby timeout of some hard drive to 5 seconds (or edit the file in /etc/udisks2 manually)

-> Immediately after saving the file, `udisksctl monitor` says:
/org/freedesktop/UDisks2/drives/MAXTOR_STM3250310AS_6RY0XFMX: org.freedesktop.UDisks2.Drive: Properties Changed
  Configuration:        {'ata-pm-standby': <1>}

-> Five seconds after saving the file, the drive parks its heads, Gnome Disks shows a 💤 icon, and `hdparm -C /dev/sd?` says 'drive state is:  standby'

2. Suspend the computer.

3. Wake up the computer.

-> All drives spin up. I think this is inevitable.

4. Wait five seconds.

Result: The drive does not spin down. If you issue `hdparm -S 1 /dev/sd?` immediately after resuming the drive does spin down after five seconds.

Expected result: The drive always spins down after the specified timeout like it did before suspending.