Known Ubuntu 12.04 CD Eject Failure Problem
Even though I am a Linux novice, recently I've done an extensive investigation of Ubuntu 12.04's strange CD eject problem. It appears to be an initialization of some sort. By the way, I am a retired electrical engineer with experience in hardware and software troubleshooting. I don't mean to boast. I just want to emphasize that my data has been collected objectively.
Hardware: HP d530 tabletop computer running only Ubuntu 12.04
1. I can mount and eject a CD from the system before Linux boots up while BIOS is running.
2. This problem prevails as soon as Linux takes over from BIOS and essentially blocks the user from opening the CD tray. When the eject button is pushed, the CD LED fails to light up and the tray remains locked. Obviously this condition is caused by Ubuntu 12.04 and not the hardware.
3. The same problem remains even though I have re-installed Ubuntu 12.04 twice on the same machine.
4. I have never experienced this kind of problem with Ubuntu 11.04, which shares another HP computer with Windows XP, where I can open and close the CD tray freely, as though I were running Windows XP.
5. I've run an interesting experiment in which I pre-load the CD drive with a CD prior to activating Ubuntu12.04. Initially everything works fine after 12.04 comes up. However, the lock-up problem soon returns after a short while. This is what leads me to suspect that the root cause may be some sort of improper initialization. By the way, my experiment's results re repeatable.
6. There is no question as to the soundness of the CD drive's hardware. Before switching my HP d530's O.S. from Windows XP to Ubuntu 12.04, I never had a single problem with the CD drive in three years.
7. If it were not for my repeated failures to install Ubuntu 11.04 successfully on the HPd530, I would have loved to drop 12.04 from this machine as 11.04 is far more user-friendly and accepts both my Linksys wireless-G adapter and IOGear wireless-N adapter instead of only the IOGear one. An interesting thing is that the same Ubuntu 11.04 installation CD works perfectly in a Wubi environment but won't even work off the CD itself before any installation is attempted on the HPd530 tabletop.
I hope I've presented my data clearly enough and will appreciate any advice from the Ubuntu community.
Julianloui
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