When I connect to a virtual machine running Ubuntu 10.04 LTS on Hyper-V, the refresh rate of the console used to be terribly slow. It would refresh the screen line by line with each line taking 1 second! It was painfully slow. So, all this while, I used putty to SSH into the VM just to avoid using the console. And then came a situation where I locked myself out of the instance (thank you DenyHosts for doing your job well) and I had disabled remote root login. So I was forced to use the console and it was time I find a solution for the slow refresh rate. It was quite simple:

Add the line

blacklist vga16fb

to

/etc/modprobe.d/blacklist-framebuffer.conf

and restart the virtual machine. And now the refresh rate is back to normal.