I'm very much a Linux noob, so this is probably something that's easy to fix or find out.
Ever since I installed Ubuntu, my internet speed seems to be good for my Ubuntu PC, but nothing else. Once I turn my PC off, or put it to sleep mood, the devices that were slow speed back up again.
This problem happens to my Nexus 7 and my PlayStation 3, so it's not a problem with an operating system, it's to do with the network and maybe Ubuntu in some way.
Any help would be appreciated, though I'm not that well known with Linux.