[gentoo-user] mobo replaced; eth0 fails

[gentoo-user] mobo replaced; eth0 fails

[Allan Gottlieb]

My dell laptop E6510 had its motherboard replaced (as it turned out, for
no good reason) and now the wired ethernet fails.

    ajglap gottlieb # /etc/init.d/net.eth0 restart
     * Bringing up interface eth0
     *   ERROR: interface eth0 does not exist
     *   Ensure that you have loaded the correct kernel module for your hardware
     * ERROR: net.eth0 failed to start

I am hoping it is some wrong setting in the bios, but the only one I see
says the ethernet can be   disabled   enabled   enabled (with pxe)

I tried both of the enabled variants with the same outcome.

I don't think I changed the kernel during that time, but I did try two
older kernels; again with no change.  I believe I have the correct
driver built into the kernel

  ajglap gottlieb # lspci -v

  [snip]

  00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit Network Connection (rev 05)
          Subsystem: Dell Device 040b
          Flags: bus master, fast devsel, latency 0, IRQ 42
          Memory at e9600000 (32-bit, non-prefetchable) [size=128K]
          Memory at e9680000 (32-bit, non-prefetchable) [size=4K]
          I/O ports at 8040 [size=32]
          Capabilities: [c8] Power Management version 2
          Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
          Capabilities: [e0] PCI Advanced Features
          Kernel driver in use: e1000e

Any help would be appreciated.
thanks,
allan

Re: [gentoo-user] mobo replaced; eth0 fails

[Florian Philipp]

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Am 11.11.2011 21:28, schrieb Allan Gottlieb:
> My dell laptop E6510 had its motherboard replaced (as it turned out, for
> no good reason) and now the wired ethernet fails.
> 
>     ajglap gottlieb # /etc/init.d/net.eth0 restart
>      * Bringing up interface eth0
>      *   ERROR: interface eth0 does not exist
>      *   Ensure that you have loaded the correct kernel module for your hardware
>      * ERROR: net.eth0 failed to start
> 
[...]

Try `/sbin/ifconfig -a`. If you are lucky, it will show you an eth1
interface or something alike. The issue is that udev keeps track of
network interfaces. If it finds a new one, it asigns it a new number
instead of reusing the old one. You can change this, but to get
everything running fast, just copy your config from eth0 to eth1, create
a symlink between /etc/init.d/net.lo and /etc/init.d/net.eth1 and start
that one.

Hope this helps,
Florian Philipp



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Re: [gentoo-user] mobo replaced; eth0 fails

[Alan McKinnon]

On Fri, 11 Nov 2011 15:28:26 -0500
Allan Gottlieb <gottlieb@nyu.edu> wrote:

> My dell laptop E6510 had its motherboard replaced (as it turned out,
> for no good reason) and now the wired ethernet fails.
> 
>     ajglap gottlieb # /etc/init.d/net.eth0 restart
>      * Bringing up interface eth0
>      *   ERROR: interface eth0 does not exist
>      *   Ensure that you have loaded the correct kernel module for
> your hardware
>      * ERROR: net.eth0 failed to start
> 
> I am hoping it is some wrong setting in the bios, but the only one I
> see says the ethernet can be   disabled   enabled   enabled (with pxe)
> 
> I tried both of the enabled variants with the same outcome.
> 
> I don't think I changed the kernel during that time, but I did try two
> older kernels; again with no change.  I believe I have the correct
> driver built into the kernel
> 
>   ajglap gottlieb # lspci -v
> 
>   [snip]
> 
>   00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit
> Network Connection (rev 05) Subsystem: Dell Device 040b
>           Flags: bus master, fast devsel, latency 0, IRQ 42
>           Memory at e9600000 (32-bit, non-prefetchable) [size=128K]
>           Memory at e9680000 (32-bit, non-prefetchable) [size=4K]
>           I/O ports at 8040 [size=32]
>           Capabilities: [c8] Power Management version 2
>           Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
>           Capabilities: [e0] PCI Advanced Features
>           Kernel driver in use: e1000e

Seeing as it's gentoo, my first guess is that the new motherboard
doesn't have the same hardware as the old one - Dell can easily fit any
wireless card with the same specs - and that you don't have the correct
module loaded.

In the BIOS the option you want is plain "enabled", if you need pxe you
will certainly know all about that already.

Any clues in dmesg about the hardware?




-- 
Alan McKinnnon
alan.mckinnon@gmail.com

Re: [gentoo-user] mobo replaced; eth0 fails

[Michael Mol]

On Fri, Nov 11, 2011 at 4:08 PM, Alan McKinnon <alan.mckinnon@gmail.com> wrote:
> On Fri, 11 Nov 2011 15:28:26 -0500
> Allan Gottlieb <gottlieb@nyu.edu> wrote:
>
>> My dell laptop E6510 had its motherboard replaced (as it turned out,
>> for no good reason) and now the wired ethernet fails.
>>
>>     ajglap gottlieb # /etc/init.d/net.eth0 restart
>>      * Bringing up interface eth0
>>      *   ERROR: interface eth0 does not exist
>>      *   Ensure that you have loaded the correct kernel module for
>> your hardware
>>      * ERROR: net.eth0 failed to start
>>
>> I am hoping it is some wrong setting in the bios, but the only one I
>> see says the ethernet can be   disabled   enabled   enabled (with pxe)
>>
>> I tried both of the enabled variants with the same outcome.
>>
>> I don't think I changed the kernel during that time, but I did try two
>> older kernels; again with no change.  I believe I have the correct
>> driver built into the kernel
>>
>>   ajglap gottlieb # lspci -v
>>
>>   [snip]
>>
>>   00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit
>> Network Connection (rev 05) Subsystem: Dell Device 040b
>>           Flags: bus master, fast devsel, latency 0, IRQ 42
>>           Memory at e9600000 (32-bit, non-prefetchable) [size=128K]
>>           Memory at e9680000 (32-bit, non-prefetchable) [size=4K]
>>           I/O ports at 8040 [size=32]
>>           Capabilities: [c8] Power Management version 2
>>           Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
>>           Capabilities: [e0] PCI Advanced Features
>>           Kernel driver in use: e1000e
>
> Seeing as it's gentoo, my first guess is that the new motherboard
> doesn't have the same hardware as the old one - Dell can easily fit any
> wireless card with the same specs - and that you don't have the correct
> module loaded.
>
> In the BIOS the option you want is plain "enabled", if you need pxe you
> will certainly know all about that already.
>
> Any clues in dmesg about the hardware?

On that note, find the udev rule for persistent networking and wipe it.

-- 
:wq

Re: [gentoo-user] mobo replaced; eth0 fails

[Mick]

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On Friday 11 Nov 2011 21:12:29 Michael Mol wrote:
> On Fri, Nov 11, 2011 at 4:08 PM, Alan McKinnon <alan.mckinnon@gmail.com> 
wrote:
> > On Fri, 11 Nov 2011 15:28:26 -0500
> > 
> > Allan Gottlieb <gottlieb@nyu.edu> wrote:
> >> My dell laptop E6510 had its motherboard replaced (as it turned out,
> >> for no good reason) and now the wired ethernet fails.
> >> 
> >>     ajglap gottlieb # /etc/init.d/net.eth0 restart
> >>      * Bringing up interface eth0
> >>      *   ERROR: interface eth0 does not exist
> >>      *   Ensure that you have loaded the correct kernel module for
> >> your hardware
> >>      * ERROR: net.eth0 failed to start
> >> 
> >> I am hoping it is some wrong setting in the bios, but the only one I
> >> see says the ethernet can be   disabled   enabled   enabled (with pxe)
> >> 
> >> I tried both of the enabled variants with the same outcome.
> >> 
> >> I don't think I changed the kernel during that time, but I did try two
> >> older kernels; again with no change.  I believe I have the correct
> >> driver built into the kernel
> >> 
> >>   ajglap gottlieb # lspci -v
> >> 
> >>   [snip]
> >> 
> >>   00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit
> >> Network Connection (rev 05) Subsystem: Dell Device 040b
> >>           Flags: bus master, fast devsel, latency 0, IRQ 42
> >>           Memory at e9600000 (32-bit, non-prefetchable) [size=128K]
> >>           Memory at e9680000 (32-bit, non-prefetchable) [size=4K]
> >>           I/O ports at 8040 [size=32]
> >>           Capabilities: [c8] Power Management version 2
> >>           Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
> >>           Capabilities: [e0] PCI Advanced Features
> >>           Kernel driver in use: e1000e
> > 
> > Seeing as it's gentoo, my first guess is that the new motherboard
> > doesn't have the same hardware as the old one - Dell can easily fit any
> > wireless card with the same specs - and that you don't have the correct
> > module loaded.
> > 
> > In the BIOS the option you want is plain "enabled", if you need pxe you
> > will certainly know all about that already.
> > 
> > Any clues in dmesg about the hardware?
> 
> On that note, find the udev rule for persistent networking and wipe it.

+1

rm /etc/udev/rules.d/70-persistent-net.rules

then reboot.
-- 
Regards,
Mick

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Re: [gentoo-user] mobo replaced; eth0 fails

[Allan Gottlieb]

On Fri, Nov 11 2011, Allan Gottlieb wrote:

> My dell laptop E6510 had its motherboard replaced (as it turned out, for
> no good reason) and now the wired ethernet fails.

Thank you florian, alan, michael, and mick.
This list is one of gentoo's strongest advantages.

To summarize the responses and my actions.

1.  Indeed the system had assigned the new wired ethernet device
    a new name (eth2, my wireless is eth1, previous wired was eth0).

2.  /etc/udev/rules.d/persistent-net.rules does tell the story.
    This file ensures that the same PHYSICAL device keeps the same name.
    Once you change the hardware, the same "logical device" (in my case
    wired ethernet) gets a new permanent name.

3.  Some advised blowing away .../persistent-net.rules.
    I chose to modify it so that the new device is now eth0 and the old
    device is gone.

Thank you again.  The result was error solved and knowledge gained.

allan

Re: [gentoo-user] mobo replaced; eth0 fails

[Albert W. Hopkins]

On Fri, 2011-11-11 at 21:41 -0500, Allan Gottlieb wrote:
> 3.  Some advised blowing away .../persistent-net.rules.
>     I chose to modify it so that the new device is now eth0 and the
> old
>     device is gone.

Removing it does the same thing.  The device file is re-created with the
currently probed hardware and indexes start from 0.  It's just that most
people prefer to just remove it because it's less typing and less prone
to errors.

> 
> 

Re: [gentoo-user] mobo replaced; eth0 fails

[Allan Gottlieb]

On Sat, Nov 12 2011, Albert W. Hopkins wrote:

> On Fri, 2011-11-11 at 21:41 -0500, Allan Gottlieb wrote:
>> 3.  Some advised blowing away .../persistent-net.rules.
>>     I chose to modify it so that the new device is now eth0 and the
>>     old
>>     device is gone.
>
> Removing it does the same thing.  The device file is re-created with the
> currently probed hardware and indexes start from 0.  It's just that most
> people prefer to just remove it because it's less typing and less prone
> to errors.

I was worried that then eth0 might be wireless and eth1 wired,
but I should have tried it and only changed names if the switch
happened.

thanks,
allan

Re: [gentoo-user] mobo replaced; eth0 fails

[Neil Bothwick]

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On Sat, 12 Nov 2011 08:44:16 -0500, Allan Gottlieb wrote:

> > Removing it does the same thing.  The device file is re-created with
> > the currently probed hardware and indexes start from 0.  It's just
> > that most people prefer to just remove it because it's less typing
> > and less prone to errors.  
> 
> I was worried that then eth0 might be wireless and eth1 wired,
> but I should have tried it and only changed names if the switch
> happened.

No, that was a valid worry, you did the right thing. Removing the file is
easiest, but only 100% safe if you have only one eth device.


-- 
Neil Bothwick

Love and Trust: Oral sex between cannibals.

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Re: [gentoo-user] mobo replaced; eth0 fails

[Allan Gottlieb]

On Sat, Nov 12 2011, Neil Bothwick wrote:

> On Sat, 12 Nov 2011 08:44:16 -0500, Allan Gottlieb wrote:
>
>> > Removing it does the same thing.  The device file is re-created with
>> > the currently probed hardware and indexes start from 0.  It's just
>> > that most people prefer to just remove it because it's less typing
>> > and less prone to errors.  
>> 
>> I was worried that then eth0 might be wireless and eth1 wired,
>> but I should have tried it and only changed names if the switch
>> happened.
>
> No, that was a valid worry, you did the right thing. Removing the file is
> easiest, but only 100% safe if you have only one eth device.

Thanks for the confirmation.
allan