Use case: clock set to local time (dual boot with Windows). A daylight savings transition happens, but the clock is not written out to hardware. Computer is suspended, and when resumed the timezone is correct, but the time has reverted to the time before the transition.
There are some relevant comments in bug 91418: the last comments by Andrew Bennetts in particular are actually related to this bug. -- hwclock.sh should be called before/after hibernate https://launchpad.net/bugs/36815 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs