Bug 128590

Summary:	Can't unmount cdrom - "device is busy"
Product:	Gentoo Linux	Reporter:	Dima Ryazanov <dima>
Component:	[OLD] Core system	Assignee:	Gentoo Linux bug wranglers <bug-wranglers>
Status:	RESOLVED WORKSFORME
Severity:	normal
Priority:	High
Version:	2005.1
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Dima Ryazanov 2006-04-02 18:52:00 UTC

Very often, after accessing a CD, some program (e.g. konqueror) keeps some file open even if I think I closed it.

Pressing the "eject" button on the CD-ROM drive doesn't do anything. If I tell KDE to eject it, I get a pretty stupid error message:
   umount: /media/hdc is not in the fstab (and you are not root)
   Please check that the disk is entered correctly.
Well, it was able to *mount* it without being root (using pmount), so it better unmount it, too.

If I run "pumount /dev/cdrom" manually, I get:
   umount: /media/hdc: device is busy
   umount: /media/hdc: device is busy
   Error: umount failed

Why is it busy? Who is using it?

I try "fuser /media/hdc" - nothing. "lsof /media/hdc" - still nothing.

Only "/usr/sbin/lsof | grep /media" gives me:
konqueror  2324 dima   18r      REG       22,0 6069716      8706 /media/hdc/books/KnoppixKompakt_2005-06-18.pdf


Shouldn't there be a more user-friendly way to eject a CD?

Ideally, I think, "umount" (or "pumount") itself should be able to find out what program is using the device. Then, KDE or other programs could tell the user, and ask if he/she wants to close that program first.

Alternatively, it would be nice if a device could be unmounted even if it is in use. "supermount" used to do that, right? It would invalidate all of device's file descriptors, or something like that - and everything worked nicely.

Comment 1 Jakub Moc (RETIRED) gentoo-dev

2006-04-03 01:02:12 UTC

(In reply to comment #0)
> Only "/usr/sbin/lsof | grep /media" gives me:
> konqueror  2324 dima   18r      REG       22,0 6069716      8706
> /media/hdc/books/KnoppixKompakt_2005-06-18.pdf

OK, so - apparently it *is* busy.

> Ideally, I think, "umount" (or "pumount") itself should be able to find out
> what program is using the device. Then, KDE or other programs could tell the
> user, and ask if he/she wants to close that program first.

Patches are welcome, preferably send them upstream.