Comment # 38 on bug 909418 from Takashi Iwai

(In reply to Ulrich Windl from comment #37)
> (In reply to Takashi Iwai from comment #21)
> > Could you check that modifying udev rules fixes the issue as in comment 6?
> 
> I found that my system has no rule starting with "60-cdrom_id.rules"; I only
> see these rules: 55-libsane.rules  56-sane-backends-autoconfig.rules 
> 70-persistent-net.rules
> Ah, I see: There are more rules in /usr/lib/udev/rules.d!
> So I just commented the first line (--eject-media), and my tray won't open,
> even if the DVD is not mounted!
> When also commenting the second line (--lock-media) (and ejecting/reloading
> the media using the "eject" command, the tray would open when the media was
> not mounted, but the tray would also open when the media was mounted
> (kernel: VFS: busy inodes on changed media or resized disk sr0)!

eject command may do this.

> I re-tried after "udevadm control -R": When not mounted, the tray will open,
> and the tray will also open when the media was mounted.
> As I said in comment 0: "I suspect this might be a kernel problem."

Please read through the whole bugzilla comments (this and bug 912715).

I still didn't get the test result of comment 30.  Please test the kernel
package there *without* modification of udev rules.