It's still telling me that no updates are available with the three commands...
You should make an iso of ubuntu 1310
i was runnig ubuntu 12.04 and tryed to make the upgrades up 1310 and i had go from 1204 to 1210 then to 1304 and to 1310. i went throught the process al i got was black boot screen,
then i just went and made a USB bootable stick of ubuntu 1310 in this case i did choose ubuntu studio 1310 and tried it from the USB and i liked what i saw and then made full install and must say i'm impressed.
Now i can turn my PC on without the monitor being on,what i couldn't wiyh ubuntu 1204 i would get a blank screen,it was cause when pc turned on it would go strait to 800x resolution and i had the 1920x resolution,with ubuntu 1310 i don't have to worry about that.
Have to add that ubuntu 1310 studio has XFCE from default,which is my favourite desktop