While working in my Ubuntu partition (set up via magic when I double-clicked a wubi.exe six months ago), I was uncareful and filled up my hard drive while trying to install some package I don't even remember. Now, I'm getting the "GNOME Power Manager error", described here.
I've come up with two ways of solving my problem, neither of which are working.
1) Boot from an Ubuntu Live CD, delete some files. This would be fine, except that when I changed my Lenovo Ideapad's BIOS to have IDE CE japanese name, numbers and USB CD at the top, it still ignores the Ubuntu CD and proceeds to ask me to choose between Windows and the broken Ubuntu.
2) Rescue the data, reinstall via wubi. It took me a long time of poking around in Windows to discover that there's a C:\ubuntu\disks directory with directory "boot" and files "root.disk" and "swap.disk". Naively, I'm considering copying "root.disk" somewhere, reinstalling, and putting that file where I originally took it from. I don't know how dumb an idea this is.
3) Something more clever.
Usually I limit myself to making my .vimrc really pretty; this is more a more serious problem than I'm used to, and while I have my absolutely vital data backed up, I'd like to minimize what I lose.
UPDATE I couldn't confirm that it was a working Live CD as I had no other computer with a CD drive handy. So, I've made a USB stick of Ubuntu 11.04 (note: I was running 10.04 before, in case that could make something go wrong), and booted successfully from that.
df -h gets me
Filesystem Size Used Avail Use% Mounted on aufs 1.9G 46M 1.8G 3% / none 1.9G 696K 1.9G 1% /dev /dev/sdb 981M 698M 283M 72% /cdrom /dev/loop0 665M 665M 0 100% /rofs none 1.9G 188K 1.9G 1% /dev/shm tmpfs 1.9G 20K 1.9G 1% /tmp none 1.9G 92K 1.9G 1% /var/run none 1.9G 0 1.9G 0% /var/lock /dev/sr0 688M 688M 0 100% /media/Ubuntu 10.04
I imagine it's the 100%'s that are the problem. I'm supposed to mount(?) these, then? I don't quite understand what mount does.