System overrides my mount parameters in /etc/fstab
Solution 1:
You can control the root mount options by using the rootflags option. To try this once, press 'e' at the grub menu and add it to the kernel line. If you're happy with the result and want to make it permanent, add it to /etc/default/grub and run update-grub.
Solution 2:
pm-utils is overriding your custom settings. See /usr/lib/pm-utils/power.d/journal-commit.
To make the OS stop assuming it's smarter than you about commit settings, create an empty, non-executable file with the same name in /etc/pm/power.d (i.e. touch /etc/pm/power.d/journal-commit).