HELP - not finding ethernet device

Moriah

I just booted a gentoo live usb that has a 4.9.6-gentoo-r1 kernel. It is x86_64, so 64-bit. lsmod shows the tg3 is loaded, but ifconfig -a only shows localhost.
lspci -k shows the ethernet device is a Dell NetLink, which is a Broadcom BCM7780. It uses PCIe.

What could be the matter that eth0 (or goofy named new equivalent) ethernet device is not showing up?

The ubuntu live usb finds eth0 just fine.

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Naib

Moriah · Posted: Fri Jan 12, 2018 7:02 pm Post subject:

Sorry, but I don't know. They load a bazillion modules "just to be sure". The lspci under gentoo says tg3 is the right driver.
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P.Kosunen · Guru Joined: 21 Nov 2005 Posts: 309 Location: Finland

Try SystemRescueCd, it is Gentoo compatible.

Moriah · Posted: Fri Jan 19, 2018 11:38 pm Post subject:

I have already verified that the live usb has tg3 loaded, so the problem is not that the ethernet driver is missing.

I think maybe it has to do with how to get to the ethernet hardware. This ethernet hardware is listed as PCIe by lspci, so I'm wondering if I also need some kind of PCIe multiplexer driver or something, and missing that is what is keeping my ethernet hardware from being found.

I really want to use this ethernet port, becaue it is gigabit ethernet and is on the motherboard. If all else fails, I have some 100baseT ethernet boards lieing around here. I could plug one of those in and get an ethernet connection, but that doesn't help me figure out what the problem is with this gigabit PCIe ethernet hardware on the motherboard.
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krinn · Watchman Joined: 02 May 2003 Posts: 7470

Told you i find it strange, because i had own a tg3 card and never get any trouble.
But as your tg3 card is dell, maybe you need something special for it.

Anyway, if you need it to install, just use the ubuntu livecd
And if you need it in your gentoo, then you have to seek what the tg3 might need to work with your card: which for me looks resume to "a switch to gave to the tg3 module" or "a firmware for the tg3 card"

Moriah · Posted: Sun Jan 21, 2018 2:15 am Post subject:

Yes, I need it under the installed gentoo system, because this box is my gateway firewall between a cable modem and my dmz. the cable is 300mbps capable, so I don't want to throttle it with a slow ethernet port. I can install using a 100mbps card, but when its done, I need the gigabit ethernet working.

I'm wondering if the fact the the ethernet hardware is PCIe makes any difference. Do I need special drivers to use PCIe with any devices plugged into it, besides the device driver itself? Is PCIe like USB, needing support for teh channel as well as support for any attached devices. I will actually need 2 gigabit ethernet ports on this machine, one to the cable modem, and one to the dmz. I thought I could get most of the install up and running before I added the second port.
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bunder · Bodhisattva Joined: 10 Apr 2004 Posts: 5934

Not sure if this will help, but this is what I get from one of my 4.9 machines in terms of PCIE.

Tony0945 · Posted: Sun Jan 21, 2018 3:37 am Post subject: