Lost network in Ubuntu

[WanderingOak]

I have a new install of Lucid Lynx on an iMac7,1. Everything was working fine this morning, but about an hour ago, Ubuntu lost all internet connectivity. I was able to fix the problem temporarily on one account, under 'network settings' by telling it to configure IPv4 using DHCP. I tried to apply this across the system, but my other Ubuntu account was still not able to connect. After a few minutes of connectivity, all access was lost once again. An icon on the upper right corner of my monitor says 'network disabled'.

The issue started when I attempted to have my system 'hibernate'. The system became completely unresponsive, and I had to hold down the power switch and reboot. When I re-logged into Ubuntu, I had no network.


I am still able to connect with Snow Leopard.

[WanderingOak]

I just tried to connect directly to my DSL router with Ubuntu. However, for some reason, I am unable to even do that. All I got was the 'Firefox is unable to connect' message. Going into the router with my Mac, everything on the router looks good.

[WanderingOak]

I enabled logging in the router, and tried to connect with Ubuntu again. The router did not log any blocked connections, so I don't think the problem is there.

[WanderingOak]

Well, WIFI won't work either. I can't see my router (or any other networks), and entering everything by hand didn't work. My 'alternate' admin account was able to connect briefly but lost it less than a minute later. I am unable to ping my router from either account. Are there any alternate Ethernet drivers that I can download?

[WanderingOak]

After googling about a bit, I decided to try the following:

lspci | grep Ethernet

which returned the following:

05:00.0 Ethernet controller: Marvell Technology Group Ltd. Marvell Yukon 88E8058 PCI-E Gigabit Ethernet Controller (rev 13)

So, Ubuntu can see my ethernet card, but apparently it can't use it.

Any ideas?

[WanderingOak]

I'm still trying to figure this out.

lspci returns:

00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub (rev 03)
00:01.0 PCI bridge: Intel Corporation Mobile PM965/GM965/GL960 PCI Express Root Port (rev 03)
00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 (rev 03)
00:1c.3 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 4 (rev 03)
00:1c.4 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 5 (rev 03)
00:1c.5 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 6 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f3)
00:1f.0 ISA bridge: Intel Corporation 82801HEM (ICH8M) LPC Interface Controller (rev 03)
00:1f.1 IDE interface: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) IDE Controller (rev 03)
00:1f.2 IDE interface: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) SATA IDE Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller (rev 03)
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon HD 2400 XT
03:00.0 FireWire (IEEE 1394): Agere Systems FW643 PCI Express1394b Controller (PHY/Link) (rev 06)
04:00.0 Network controller: Broadcom Corporation BCM4328 802.11a/b/g/n (rev 03)
05:00.0 Ethernet controller: Marvell Technology Group Ltd. Marvell Yukon 88E8058 PCI-E Gigabit Ethernet Controller (rev 13)

Any ideas?

[linuxopjemac]

what does ifconfig tell you?

ifconfig

[WanderingOak]

ifconfig returned:

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:240 (240.0 B) TX bytes:240 (240.0 B)

I ran ifconfig eth0 and got:

eth0 Link encap:Ethernet HWaddr 00:1f:5b:ee:d7:a9
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:17

I haven't run iwconfig yet (didn't know how to check wireless until just now). I will post the results in a few minutes.

[WanderingOak]

iwconfig returned:

lo no wireless extensions.

eth0 no wireless extensions.

pan0 no wireless extensions.

One of my alternate admin accounts was able to connect wirelessly, before I lost everything.

[WanderingOak]

Dug a bit deeper and read the man files for ifconfig and ifup. I tried:

sudo ifconfig up eth0

and got nothing, even when I tried -v.

I then ran

sudo ifup -v eth0

and got the following:

Ignoring unknown interface eth0=eth0.

going deeper, I looked inside /etc/network/interfaces to find:

auto lo
iface lo inet loopback

while /var/run/network/ifstate returned:

lo=lo

So something is definitely broken. Can /etc/network/interfaces and /var/run/network/ifstate be edited by hand, or are they system generated?