I just updated my laptop from Fedora Core 3 (kernel 2.6.9-1.667)
to Fedora Core 4 (kernel: 2.6.11-1.1369_FC4)
Now eth0 (ethernet) does not correctly work, although it did work with FC3.
I am using a DHCP connection at this university with everything assigned
automatically.
==> On this laptop etho (ethernet) the identical connection works
perfectly with Knoppix 3.9 which uses kernel 2.6.11, so I know it is
not the hardware nor the DHCP server nor routers along the way.
Here are some details:
1. When I first booted to the new FC4, there was no ethernet. The boot
screen said [eth0 failed] (although from dmesg it recognized the
ethernet card). I had the identical problem earlier with the following FC3
update kernels:
2.6.12-1.1372_FC3
2.6.11-1.35_FC3
2.6.11-1.27_FC3
which is why I reverted to the older kernel 2.6.9-1.667, which did work.
Note that eth0 works perfectly with Knoppix 3.9; it uses kernel 2.6.11.
2. Then I changed grub.conf, adding "acpi=ht" so the line reads:
kernel /vmlinuz-2.6.11-1.1369_FC4 ro root=LABEL=/1 vga=773 acpi=ht
This helped a bit since now I DHCP _does work_ and I can connect to
the local sub-net, but NOT elsewhere. The problem is not the
nameserver since if I use the numerical IP address I get the same
error, as the following test shows:
> ssh 130.91.49.156
ssh: connect to host 130.91.49.156 port 22: Network is unreachable
3. When I use the Fedora menu item "Network" and look under "hosts",
it does not seem to be using my /etc/hosts file since my copy has a few
additional items (see below).
4. I changed gnome.conf to turn-off acpi and disable SELinus (so
"acpi=off selinux=0") and rebooted but that did not help.
Any suggestions?
Jerry
See below for more data, particularly from dmesg, ifconfig and netstat.
My Hardware: Dell Inspiron 9300 (laptop). See dmesg just below for the
ethernet card -- which as you can see this FC4 kernel does recognize.
I am NOT using the service "NetworkManager".
Here are items from dmesg (some of which may be irrelevant), ifconfig,
and netstat:
-------------------- snips from dmesg ----------------------------------
eth0: Broadcom 4400 10/100BaseT Ethernet 00:11:43:77:ae:ab
ieee80211_crypt: registered algorithm 'NULL'
ipw2200: Intel(R) PRO/Wireless 2200/2915 Network Driver, 1.0.0
ipw2200: Copyright(c) 2003-2004 Intel Corporation
b44: eth0: Link is down.
codec_semaphore: semaphore is not ready [0x1][0x700300]
codec_write 1: semaphore is not ready for register 0x54
codec_semaphore: semaphore is not ready [0x1][0x700300]
b44: eth0: Link is up at 10 Mbps, half duplex.
b44: eth0: Flow control is off for TX and off for RX.
eth0: no IPv6 routers present
-----------------------------------------------------
> netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
157.181.226.0 0.0.0.0 255.255.254.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
------------------------------------------------------
> cat /etc/resolv.conf # this same file works correctly for others here)
; generated by /sbin/dhclient-script
search cs.elte.hu
nameserver 157.181.226.4
nameserver 157.181.226.5
------------------------------------------------------
> cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
#JLK
128.91.55.27 mail.sas.upenn.edu
130.91.49.156 hans.math.upenn.edu
------------------------------------------------------
> /sbin/ifconfig
dhcp44:~> /sbin/ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:11:43:77:AE:AB
inet addr:157.181.227.44 Bcast:157.181.227.255 Mask:255.255.254.0
inet6 addr: fe80::211:43ff:fe77:aeab/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7708 errors:0 dropped:0 overruns:0 frame:0
TX packets:47 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:639118 (624.1 KiB) TX bytes:5849 (5.7 KiB)
Interrupt:9
