How can I disable the button of my CD/DVD drive?

Up until Fedora 14 I was successfully using cdctl to enable/disable the CD/DVD eject button on my laptop (Thinkpad T410). Sadly it has stopped working now. I've consulted the methods discussed in these 2 questions: - disable cd/dvd button on linux laptop (ubuntu) - Disable the DVD eject button on a Thinkpad running Linux None of which have worked for me. So I turn back to cdctl to see if we can't fix what's broken with it, since it's worked for so long. ### Debugging the issue So starting with cdctl switches I notice that most things seem to work just fine. ### Examples These things work. *ejects the drive* $ cdctl -e *list capabilities* $ cdctl -k Tray close : 1 Tray open : 1 Can disable eject : 1 Selectable spin speed : 1 Is a jukebox : 0 Is multisession capable: 1 Can read the MCN (UPC) : 1 Can report media change: 1 Can play audio discs : 1 Can do a hard reset : 1 Can report drive status: 1 According to that list cdctl even thinks that it can enable/disable the eject button. > Can disable eject : 1 So I continue on with debugging the issue. ### Debugging cdctl So I figure lets do an strace on cdctl to see if it can shed some light on what's going on. $ strace cdctl -o1 ... brk(0) = 0x1371000 open("/dev/cdrom", O_RDONLY|O_NONBLOCK) = -1 ENOENT (No such file or directory) open("/dev/cd", O_RDONLY|O_NONBLOCK) = -1 ENOENT (No such file or directory) open("/dev/scd0", O_RDONLY|O_NONBLOCK) = -1 ENOENT (No such file or directory) open("/dev/sr0", O_RDONLY|O_NONBLOCK) = 3 ioctl(3, CDROM_LOCKDOOR, 0x1) = 0 close(3) = 0 exit_group(0) = ? +++ exited with 0 +++ Curiously it seems like cdctl thinks it's disabling the button. $ strace cdctl -o1 ioctl(3, CDROM_LOCKDOOR, 0x1) = 0 $ strace cdctl -o0 ioctl(3, CDROM_LOCKDOOR, 0) = 0 **NOTE:** If I understand this right, the return of a 0 means it was successful. One thing that caught my eye here was the list of devices that cdctl is attempting to interact with. So I thought "what if I try these devices with eject"? ### eject command One of the other commands I used to use years ago was the eject command to interact with the CD/DVD device. I noticed that this command also now has a similar named switch: $ eject --help -i, --manualeject toggle manual eject protection on/off ### Example $ eject -i 1 /dev/sr0 eject: CD-Drive may NOT be ejected with device button $ eject -i 0 /dev/sr0 eject: CD-Drive may be ejected with device button So eject too thinks that it's disabling the button, yet it isn't either. Using strace here I see the same system calls: $ strace eject -i 1 /dev/sr0 |& grep ioctl ioctl(3, CDROM_LOCKDOOR, 0x1) = 0 $ strace eject -i 0 /dev/sr0 |& grep ioctl ioctl(3, CDROM_LOCKDOOR, 0) = 0 So now I'm wondering if UDEV or something else is potentially blocking or taking ownership of device? Thoughts?