Problem with my 3Com 905c

[Stefano Vettorazzi]

> Date: Tue, 8 Sep 2009 20:53:15 -0400
> Subject: Re: Problem with my 3Com 905c
> From: brian.mckee at gmail.com
> To: ubuntu-users at lists.ubuntu.com
> 
> On Tue, Sep 8, 2009 at 7:28 PM, Stefano
> Vettorazzi wrote:
>>>> The result is: "01:0c.0 Ethernet controller: 3Com Corporation
>>>> 3c905C-TX/TX-M
>>>> [Tornado] (rev 78)"
>>>
>>> That's a really common card (I've got a half dozen of them downstairs)
>>> both embedded and not. I wouldn't think there would be any issue with
>>> it.
>>> The issue (I think) is with your DSL provider/modem/upstream of you.
> 
>> No. Because I have tried in Windows and the speed is the real.
> 
> I would grab another computer of some sort and connect them with a
> switch/hub or crossover cable and ping each other. That takes a lot
> of possible problems out of the equation and provides a good test.
> 
> Another option would be to boot from the Live/Installer CD and ping
> from there rather than your custom kernel. What results do you get?
> 
> I checked - I've got eight machines at work with that card in it and
> pretty normal Ubuntu install - local LAN ping times (100baseT not
> gigabit) run 0.2ms
> 
> Brian
> -- 
> All you need to know about Ubuntu 9.04 Jaunty -> gconftool -s --type
> bool /apps/update-notifier/auto_launch false
> 
> -- 
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I can work with a crossover connection to other machine (I have moved 4GB of this machine to other machine), and I can connect me to internet.
If you don't know: the 3Com adapter is onboard. It can be the difference with your card.
Things that I have tried, and I remember today (with the same result) are:
 - Disable IPV6
 - Disable tcp_window_scalling, tcp_timestamps and tcp_sack
 - Install another Ubuntu's version (7.10 Desktop, 8.04 LTS Desktop, 9.04 Server, 9.04 Desktop)
 - Install Debian
 - Install Mandrake 8.1
 - Boot from the Ubuntu live CD (7.10,8.04,9.04)
 - Change the speed and the duplex mode
 - Autoconfigure the NIC with an 3Com tool 
 - Add 3c59x to /etc/modules
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