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No Ethernet after installing 2nd graphics card [Solved]
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bikash
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PostPosted: Fri May 03, 2013 11:49 am    Post subject: No Ethernet after installing 2nd graphics card [Solved] Reply with quote

Hi all,

On a new built system, I have a problem where my Ethernet card is not available after I installed second GPU.
It works if I remove this second card.
Both GPU are NVIDIA GTX 550 TI and are installed in 2 PCI-e slots. Ethernet is a Broadcom Netlink BCM55781 and is onboard my Asrock Z77 Extreme4 Motherboard.

ifconfig only lists lo, net.eth0 script complains interface eth0 doesn't exists. lspci shows that I do have the Ethernet card.

Tried re-compiling kernel with all PCI-e options available which only resulted in System freezing up.
I have UEFI bios and don't see any option to manage PCIe.

Running 3.7.10-gentoo-r1 kernel.

Anybody experienced this kind of issue and successfully troubleshooted it. Is there a option in kernel to handle this in software?
Any kind of feedback or workaround is much appreciated.
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Last edited by bikash on Fri May 03, 2013 11:08 pm; edited 1 time in total
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krinn
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PostPosted: Fri May 03, 2013 2:47 pm    Post subject: Reply with quote

You're just another victim of udev maintainers, read http://forums.gentoo.org/viewtopic-t-955646-postdays-0-postorder-asc-start-0.html
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bikash
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PostPosted: Fri May 03, 2013 8:52 pm    Post subject: Reply with quote

Thanks for the pointer Krinn.

My network interface already comes with the name enp4s0, I put it as eth0 here for the sake of simplicity. However, even if udev renamed the interface to something else, should it not show up when I do ifconfig?
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Aiken
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PostPosted: Fri May 03, 2013 8:58 pm    Post subject: Reply with quote

bikash wrote:
should it not show up when I do ifconfig?


Try 'ifconfig -a' as it will show interfaces that have not been configured yet. Welcome to the world of udev and it's unpredictable network names.
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bikash
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PostPosted: Fri May 03, 2013 11:08 pm    Post subject: Reply with quote

Thanks Aiken/Krinn.
The interface was indeed renamed to enp5s0 from enp4s0.
This is resolved.
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miket
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PostPosted: Sat May 04, 2013 2:35 am    Post subject: Reply with quote

bikash wrote:
Thanks Aiken/Krinn.
The interface was indeed renamed to enp5s0 from enp4s0.
This is resolved.

It bears repeating yet another time: the "predictable"interface-name scheme is completely bogus: the Gentoo documentation should make the strong recommendation that users never use the stupid, problem-causing bus-addressed names.

This fiasco is causing vast amounts of completely unnecessary pain!

I'm terribly sorry you had to go through this hassle.
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Jaglover
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PostPosted: Sat May 04, 2013 3:27 am    Post subject: Reply with quote

Basically, predictable names are not predictable?
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Aiken
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PostPosted: Sat May 04, 2013 4:21 am    Post subject: Reply with quote

Jaglover wrote:
Basically, predictable names are not predictable?


If your machines remains untouched the names should remain the same. This thread is not the 1st time a person has reported adding a new card and an existing network adaptor has had a name change. If for whatever reason you remove any network cards and put them back in a different slot you get a new name. Usb wifi adaptors instead of giving wlan0 no matter which usb port they were plugged into now give a different name depending on which port is used.

That last bit annoys me as with the old system does not matter which wifi adaptor and which port I had wlan0. Using mac -> name mapping I would have to map the mac of every adaptor to wlan0 and with the so called predictable names I could get up to 10 different names depending on which usb port is used. So much easier grabbing an usb adaptor and going with the kernel assigned wlan0.
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Jaglover
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PostPosted: Sat May 04, 2013 8:29 pm    Post subject: Reply with quote

I see. What's next. Stickable names would be an improvement. This was posted using eth0, BTW. :P
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bikash
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PostPosted: Tue May 14, 2013 6:48 am    Post subject: Reply with quote

I don't want to blame Gentoo developers for this supposed 'Fiasco'. The must be a reason somewhere. I am more tortured with my stupidity about not checking with 'ifconfig -a'. It could have saved me and other's who took the time the reply a lot of typing.
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