100 mb/s connection unstable after HD move, but 10 mb/s is stable
I'm trying to troubleshoot why my desktop PC's LAN connection specifically on 100 mb/s speed (full duplex, autoneg on) is now unstable specifically in my dorm room on the college network. It can download files fine, but web pages will literally take forever to load and games that require an internet connection will not recognize any input.
My connection started doing this when I tried to put a second IDE hard drive into my PC (I had to unplug and replug the power/IDE cables to my primary HD and the power plug to my video card to make room)...I immediately took it out afterwards and the terrible connection remained. It doesn't make any sense to me why this would've screwed up my connection, but I've narrowed the problem down pretty far now:
-The port and the cable were tested and are fine.
-My hard drive was reformatted so that's fine.
-My internet connection was fine when I brought my PC to my friend's house and tested it there.
-My account to log into the college network was tested on other PC's and is fine.
The funny thing is when I change the speed to 10 mb/s, autoneg off, full duplex mode via the command "sudo mii-tool -F 10baseT-FD" the connection is stable and I am able to browse websites normally and play games online with no issues. But the speed for downloading individual files is slow now, and that's why I need to fix my 100 mb/s connection.
Here are my default settings (gives the unstable connection) to which I switch to via "sudo mii-tool -R":
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
Advertised auto-negotiation: Yes
Supports Wake-on: g
Current message level: 0x00000007 (7)
Link detected: yes
The IP address is correct and IPV6 is disabled.
The school's network is working fine for everybody else.