Network Failure after Update

Follow up to: this question:

After uninstalling a load of packages in order to free space on /boot for upgrades etc. I loaded Ubuntu software manager and was prompted to install an update, which I did, and then restarted. After restarting, the network connection is down. All settings are before, I hadn't touched /etc/network/interfaces before, only created/edited the network settings in Network Manager.

Also, the screen resolution is wrong and can't be changed. It would appear that I've lost network card drivers & graphics drivers. I have fixed this many times before in Windows but I wouldn't have a clue how to go about it in Linux?

Outputs

lspci | grep -i -e vga -e ethernet:
00:02.0 VGA compatible controller: Intel Corporation 82G33/G31 Express Integrated Graphics Controller (rev 02) 01:00.0 Ethernet controller: Intel Corporation 82541PI Gigabit Ethernet Controller (rev 05) 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 02)

nmcli dev:
DEVICE TYPE STATE eth1 802-3-ethernet unmanaged

Solution 1:

I eventually fixed this by using a PCI network card. I was still getting the message in Network Manager that the device wasn't managed, so I followed the instructions in this question. I am finally back to normal! Thanks for everyone's help.

P.S. Also fixed the display resolution being stuck at 640×480 by following this article (#1 solution worked for me)