View Full Version : [ubuntu] problem connecting to internet with new mb Gigabyte G31M-ES2L

February 4th, 2010, 12:07 PM
After changing to a new motherboard, model Gigabyte S-series G31M-ES2L, I find that I cannot establish a connection to the internet. Using this new motherboard on the same computer and restarting to other operating system, it can establish connection to the internet. Is there any way I can solve this problem?

February 4th, 2010, 02:26 PM
It is possible you may have to do a fresh install of your Ubuntu, if you installed a new motherboard, then certain things may not longer be recognized. If you are able to backup all you data, then re-install, it should give you a nice clean start again.

February 4th, 2010, 03:44 PM
just to make sure ubuntu has recognized your card post output of ifconfig from the terminal

February 6th, 2010, 07:11 AM
I post ifconfig onto the terminal and I get:
wstay@wstay-desktop:~$ ifconfig
eth1 Link encap:Ethernet HWaddr 00:14:78:04:47:08
inet addr: Bcast: Mask:
inet6 addr: fe80::214:78ff:fe04:4708/64 Scope:Link
RX packets:798 errors:0 dropped:0 overruns:0 frame:0
TX packets:807 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:835521 (835.5 KB) TX bytes:161146 (161.1 KB)
Interrupt:20 Base address:0xdc00

lo Link encap:Local Loopback
inet addr: Mask:
inet6 addr: ::1/128 Scope:Host
RX packets:320 errors:0 dropped:0 overruns:0 frame:0
TX packets:320 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:25760 (25.7 KB) TX bytes:25760 (25.7 KB)


The eth1 is my pci ethernet card.
I wonder why it cannot detect the RJ-45 Lan Port on the rear of the motherboard?

February 9th, 2010, 04:31 PM
well , you might need drivers for that , look under system->admin->hardware drivers , if nothing is listed post output of lshw -C network from the terminal

February 9th, 2010, 06:15 PM
That board uses the RTL8111C chip.

Post output of:

lspci | grep -i eth
lsmod | grep r81*

March 5th, 2010, 11:53 AM
I have another problem with the pci ethernet.
Why after configuring the subnet mast to and pressing ok and going back to see the subnet mast again, it becomes 24?

March 5th, 2010, 04:07 PM
I have another problem with the pci ethernet.
Why after configuring the subnet mast to and pressing ok and going back to see the subnet mast again, it becomes 24?There are two different ways of describing the netmask value. One (the original method) was to use the "dotted quad" format of However as the net grew in popularity, the original method got a bit cumbersome. For example, the netmask my ISP has me use is because the actual mask value is 11111111 11111111 11111111 11111000. The reason for this is so they can crowd more users into the spectrum. Thus a simpler method for describing the mask was developed: counting the number of "1" bits from the left. That gives you a value of "/24" and me a value of "/29" (and the "/" character is the signal that the new method is in use).

When different programs use different methods, though, it can be confusing -- as you've discovered!

March 10th, 2010, 10:27 AM
I installed ubuntu-9.10 and there is no problem dictating and connecting to the internet on the Gigabyte G31M-ES2L motherboard.
My problem now with ubuntu-9.10 is that it sometimes behaves strangely.
My screen can go blank at times when I am just using it (normal use) and at one time when I try to install wine using synaptic. A few times, the screen on the monitor can go on blinking when it reaches a point just before I can login after I restart the computer. Also at times the usb mouse freezes. Is this an indication of a virus or a hardware or software problem?
I am using ubuntu-9.10 on a Pentium 2.6 Ghz on the Gigabyte G31M-ES2L motherboard with 1 Gb ram.