Public bug reported:
The automount process is supposed to unmount all mounted filesystems
when it receives a SIGUSR1. I use this extensively to unmount things
like usb-sticks. On a fresh dapper system with the xubuntu desktop,
this doesn't work:
- the automount daemon DOES unmount the filesystem, as can be seen by doing a
'mount' command right after the kill command
- some other process (?) then accesses the filesystem that was just unmounted
- automount notices this and immediately remounts the filesystem
Effectively, within 0.5-1 second all unmounted filesystems are remounted
again. This seems to always occur with nfs mounted filesystems, but It
also regularly happens with usb sticks and other removable media. (but
not 100% reliably).
On a debian unstable system I saw the same thing happening, there it was
due to the hald trying to access the filesystem once it was unmounted.
I have tried to stop the hald and reproduce the bug - no visible changes
in behaviour. The bug also occurs from a text console right after a
fresh reboot, so it appears that it is not due to KDE or GNOME services
(or XFCE in my case). I have tried shutting down as many system daemons
as possible, but could not locate the culprit.
I realize this bug is likely not the fault of the autofs package, but it
is related and very annoying. It would be nice if it could be
investigated, as it renders the autofs package nearly useless for
removable media.
** Affects: autofs (Ubuntu)
Importance: Undecided
Status: Unconfirmed
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Unmounting of automounted filesystems fails with SIGUSR1
https://launchpad.net/bugs/63720
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