I am at 10.10 Ubuntu for a few months now and I have a problem that seems to have arisen about the time of the upgrade. Certain commands that I issue from a shell or other means will not execute (no output) and are unable to be cancelled, killed, blasted or otherwise destroyed, except by reboot. Typically these involve devices (mount, unmount, dd) and my DVD-drive is often the culprit.
Following a boot/reboot, I seem to get 1 read of a CD/DVD. It will automount and I can umount it. But, if I change the media, or even remove and re-insert the same media, a mount will not complete. It will not automount nor will a manual mount work. The attemped manual mount will never return and I cannot get it to stop.
I have tried to stop with Control-C or Control-Z in the terminal. From another terminal I find the process ID and have tried kill and sudo kill -9 to no avail. I have tried to kill the running terminal session (File->Close, window close). Even if I succeed in killing the terminal session, the command I entered is still there on the list of processes.
I command is not taking up any CPU resources. No other process will be taking more than 1% of the cpu. I can close all the applications and nothing changes.
This experience totally defies my prior Linux and Unix experience. kill -9 always did its job. kill is running /bin/kill, an ELF file last modified in 2009. Kill works in all other occasions though sometimes it may be a bit slow.
Can anyone share any insights on this that might help me prior to a wipe and fresh install?