Slow internet on Ubuntu

[CanyonMan]

I have partitioned by disk. One partition has Debian Sarge and the other has Ubuntu. Ubunutu works very well except the internet connection is slow. When I use the internet in the Debian partition, it is very fast.

Here is an excerpt of the syslog file from Ubuntu:

Feb 13 23:15:27 localhost kernel: [4294674.926000] 8139cp: 10/100 PCI Ethernet driver v1.2 (Mar 22, 2004)
Feb 13 23:15:27 localhost kernel: [4294674.926000] 8139cp: pci dev 0000:00:0d.0 (id 10ec:8139 rev 10) is not an 8139C+ compatible chip
Feb 13 23:15:27 localhost kernel: [4294674.926000] 8139cp: Try the "8139too" driver instead.
Feb 13 23:15:27 localhost kernel: [4294674.928000] 8139too Fast Ethernet driver 0.9.27
Feb 13 23:15:27 localhost kernel: [4294674.928000] ACPI: PCI Interrupt 0000:00:0d.0[A] -> Link [LNKA] -> GSI 11 (level, low) -> IRQ 11
Feb 13 23:15:27 localhost kernel: [4294674.928000] eth0: RealTek RTL8139 at 0xc000, 00:50:2c:04:e1:47, IRQ 11
Feb 13 23:15:27 localhost kernel: [4294674.928000] eth0: Identified 8139 chip type 'RTL-8100B/8139D'

Here is an excerpt of the syslog file from Debian:

Feb 13 19:10:38 localhost kernel: 8139too Fast Ethernet driver 0.9.26
Feb 13 19:10:38 localhost kernel: eth0: RealTek RTL8139 at 0xc000, 00:50:2c:04:e1:47, IRQ 11
Feb 13 19:10:38 localhost kernel: eth0: Identified 8139 chip type 'RTL-8100B/8139D'


Ubuntu ifconfig output

eth0 Link encap:Ethernet HWaddr 00:50:2C:04:E1:47
inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::250:2cff:fe04:e147/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:352 errors:0 dropped:0 overruns:0 frame:0
TX packets:391 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:285469 (278.7 KiB) TX bytes:71494 (69.8 KiB)
Interrupt:11 Base address:0xc000

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:1839 errors:0 dropped:0 overruns:0 frame:0
TX packets:1839 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:546944 (534.1 KiB) TX bytes:546944 (534.1 KiB)

It looks like the two operating systems are using the same driver and the same IRQ. I am not sure how to troubleshoot this problem. Any help is appreciated.

[antidrugue]

I presume you are using Ubuntu 5.10. Then you should look at this:

http://ubuntuforums.org/archive/index.php/t-87798.html

As far as I know, this problem is only related to the default Firefox browser in Ubuntu. So just try another browser, or disable ipv6 in /etc/modules.conf, by adding those two lines:

alias ipv6 off 
alias net-pf-10 off

Something like that... or just install Firefox 1.5 and it will be the end of it.

[CanyonMan]

Thanks for the info. The following worked for me.

I added a new file bad_list to the /etc/modprobe.d directory that contained the
following line:

alias net-pf-10 off

and then I rebooted. The internet is much faster now (the same speed as on my Debian distro)

This solution disables the newer internet protocol that is used to resolve newer internet addresses. The link given by the reply above gives more info on this topic.