I've been using Ubuntu 12.04 for a while on my Acer Aspire One-722. It was ok, but then, after some updates, the next time i started it, an window "the system is running in low-graphics mode" appeared. I couldn't find out, what to do, so i reinstalled Ubuntu from DVD. The installation went normally, but when i rebooted, I saw it doesn't react on mouse moving, only to keyboard. It also doesn't connect to wi-fi (or i just don't know, how to connect to it without mouse). I tried to find an answer in the internet, but most of advises include downloading something, which I can't do. Thanks everyone who would try to help me.
graphics: AMD Radeon HD 6250 Graphics
network: Atheros AR8152/8158 PCI-E Fast Ethernet Controller (NDIS 6.20)
processor: AMD C-50