I can reproduce this. But nothing to do with udisks, I get the same
behaviour if I kill udisks-daemon, chmod it to 0, log out of the desktop
session (so no gvfs etc. either), and just run "sudo pm-suspend" on a
terminal. Then my mounted USB stick as well as my internal /dev/sda1
(which carries my root partition) get an extra "commit=600" in
/proc/mounts. In /etc/fstab / mount output, sdb1 (USB stick)
additionally gets "commit=0". In dmesg I see
EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=600
EXT4-fs (sdb1): re-mounted. Opts: commit=600
This does not happen if I use a raw "echo mem | sudo tee
/sys/power/state". Then sdb1 just gets unmounted and not re-mounted at
all.
The "commit" mount option comes from /usr/lib/pm-utils/power.d/journal-
commit.
So the root of the bug is that calling "mount -o remount,commit=600
/dev/sdb1" always appends the new option to /etc/mtab instead of
recognizing an already existing one. This doesn't happen in
/proc/mounts, so the kernel side is fine.
** Changed in: util-linux (Ubuntu)
Status: New => Confirmed
** Changed in: util-linux (Ubuntu)
Assignee: (unassigned) => Canonical Desktop Team (canonical-desktop-team)
** Summary changed:
- Suspend/Resume adds "commit=600,commit=0" options to mounted USB drives
+ mount -o remount always appends options to /etc/mtab even if they already
exist
** Changed in: util-linux (Ubuntu)
Importance: Undecided => Low
** Changed in: util-linux (Ubuntu)
Status: Confirmed => Triaged
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https://bugs.launchpad.net/bugs/891688
Title:
mount -o remount always appends options to /etc/mtab even if they
already exist
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