My wireless used to work quite well. I had some issues with it, but everything was well in the end. Now I have some strange issues. I can find wireless networks, I can connect to them, but internet connection itself turns to be sluggish and unstable, and quite often my laptop disconnects suddenly. The result is that wireless internet connection is practically unusable. I don't think this is a router problem, since I had no issues until 3 days ago, and my cellphone connects flawlessly. I tried to restart my router, but nothing changed.
I have an Acer Aspire 5560 with AMD A4-3300M processor.
Thank you in advance
(I'm using Xubuntu by the way. Does this change anything?)