Hi , I installed 14.04 on a Lenovo laptop and the internet was a bit slow. I followed an interent tutorial that suggested upgrading the driver, but on the next reboot there was no ethernet connection at all. The network manager is greyed but it connects to wifi fine.
I did a clean install of Ubuntu 14.04 the first and the only OS on my new laptop ASUS X550C and I cannot connect to any Wi-Fi, even toggling fn+f2 (keyboard default) doesn't swith/show Wi-Fi indicator on.
For some reason on my laptop, my wireless has started cutting off every 5 seconds. The wireless has been working fine for 6 months and I haven't made any changes to my router or downloaded any new software.
This is how it looks on system monitor: http://i.imgur.com/KjlDyfH.png
We are hunting some performance issues on W2012R2 servers here. Some people are suspecting an issue on the network layer (LAN), or the network driver/NIC to be more specific. So they pulled out netperf and started some measurements, from which I say the measurement method and conclusion is wrong.