I have a Gateway NE56R laptop running the latest Kubuntu 14.10 x64 beta, although I had this same problem on Trusty. This problem may also affect some Acer Aspire laptops if that helps you fix my problem.
If I close my laptop's lid (I use a VGA monitor when it's closed), my system acts a little strange. If I close it anytime between when GRUB starts booting and when I actually sign in to Kubuntu, my laptop will suspend, even though I set it not to. For this reason, my laptop DOES NOT suspend after I'm signed in. Also, closing the lid seems to significantly slow down all wireless communication via Wi-Fi (yes, I've disabled power saving).
Also, sometimes if my lid is closed for a long time (an hour maybe), all USB devices just lose power and don't work until a restart. Sometimes I can just unplug something and plug it back in and it makes everything work again. Only sometimes. Remember that; if I replug one device, it will sometimes make all devices work again. All of this also happened in Trusty too.
Also, I think I should mention that my wireless card is a Broadcom BCM4313. Although I know many, many Ubuntu users are having problems getting their BCM4313 to work, I was able to get mine to work and it works great, so don't say anything about "fixing" my wireless- it's fine. Ubuntu's reaction to the LID closing is the problem.
