Comment 11 for bug 397734

(In reply to comment #1)
> For the record, the hal-addon-storage had a poll loop which regularly queried
> the CD-ROM whether the eject button was pressed, and if so, emit an
> "EjectPressed" device condition through d-bus. Something in the desktop session
> (usually nautilus) would pick that up and ask hal to eject the drive.
>
> This mechanism is completely lacking in DK-disks, so it's not a small change.
> Also, I'm not sure whether we actually want this kind of callback back in
> DK-disks.

Right, I don't think we want to reintroduce that behavior. FWIW, newer SATA optical drives has a mechanism so we can avoid polling at all. This should save ~1W or so since the device and SATA link can be powered down all the time.

> One possible alternative would be to not lock the CD-ROM tray when mounting.
> This leads to much less clean unmounts, since the device would disappear while
> it is still mounted (and then the kernel/userspace have to clean up
> afterwards). For read-only media like CD-ROM or DVDs this does not actually
> pose a problem, though.

I think that is the way to go. So we should just tell distros to do

 echo 0 > /proc/sys/dev/cdrom/lock

at boot time.