I was doing fine with 12.10 but I read that 13.04 took care of a few of the more sluggish aspects of 12.10 so I decided to upgrade.
The installation package seemed significantly less smooth than 12.10- instead of a snappy, smooth experience it had a few graphical bugs and took a LONG time to load, with various pools of unresponsiveness. Regardless, I went through with it.
Now, unless I boot from USB from the BIOS menu, the computer simply does not boot Ubuntu. I re-installed, to no effect. There is just a single flickering
| on the top-left. Randomly pressing keys, after the first 7 or so, starts producing system beeps. The system is not completely unresponsive: It turns the screen on-and-off if I press "Ctrl+Alt+Del".
Pressing shift makes no difference.
hardware info: Tecra M11. Nvidia Quadro NVS 150m. 4gb RAM.