Do you have ACPI installed? Is this a laptop? If not, perhaps ACPI is powering down your peripherals after a certain period, which you presumably do not want. So you might want to look into turning it off (you should be able to stop the daemon and prevent it starting on boot via the Mandrake Control Center... don't know how you'd do it in Fedora, sorry).
Most likely the CD-ROM drives in Mandrake at least are using either Supermount or MagicDev (which I know was supposed to replace Supermount in 10.0). I have never used MagicDev, but I usually find that it works better to just use auto in /etc/fstab than Supermount at least, so the same may be true for MagicDev. Could you post the relevant lines of /etc/fstab?
It's possible that if ACPI was the problem, it will clear up once that's off, but in any case, using the right-click eject function (so that the OS recognizes that the contents are about to change), and then reinserting the previous CD or an new one will often clear up the file manager problem (you may have to refrest the view). You could also manually remount the drive as a workaround, because it appears that what has happened is that the drive has "half-unmounted" (meaning that the drive has unmounted, but the last known status are saved and displayed. So when you change CDs, nothing changes because the drive is not actually mounted) when the power-down occurs (if that's what's actually happening). One of the many reasons that this supermount technology remains fairly irritating, instead of useful as one expects.
Hope this helps.
Last edited by motub; 03-31-2004 at 06:52 AM.