Cannot Get Back Ethernet Connection

[Ted]

did you add a pci card or reset or change your bios in mobo at the time 
this occurred.
looking at other entries for other HW in lspci -vv may show other 
differences.
There is PCI irq mapping at play and the fedora vs. ubuntu kernel are 
working it differently (i am guessing).

of course if you change pci settings in your bios (i.e. no plug and 
play,and other pci/irq related settings) you risk nuking your windows
(i know, as its happened to me once years ago).

you should also look at dmesg of boot time (time frame).
Maybe just update your ubuntu kernel? or pass in some boot string to 
manipulate APCH settings.
But why it started to happen in the first place? i am guessing because 
of a add/remove pci card or bios change/update?

-tl


On 01/27/2012 12:07 PM, john.moniz-rieW9WUcm8FFJ04o6PK0Fg at public.gmane.org wrote:
>
>
> > From: ted.leslie-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org
> > Date: Fri, 27 Jan 2012 10:23:52 -0500
> > Subject: Re: [TLUG]: Cannot Get Back Ethernet Connection
> > To: tlug-lxSQFCZeNF4 at public.gmane.org
> >
> > lspci -vv
> > i mean.
> >
> > -tl
>
> Here's what came out - all I get out of it is that the irq's are 
> different for ubuntu and fedora.
>
> UBUNTU:
> -------------
> "dmesg eth":
> <snip>
> [    0.815136] forcedeth: Reverse Engineered nForce ethernet driver. 
> Version 0.64.
> [    0.815419] forcedeth 0000:00:07.0: PCI INT A -> Link[APCH] -> GSI 
> 23 (level, low) -> IRQ 23
> [    0.815424] forcedeth 0000:00:07.0: setting latency timer to 64
> [    1.336900] forcedeth 0000:00:07.0: ifname eth0, PHY OUI 0x732 @ 
> 13, addr 00:1f:c6:04:ec:f0
> [    1.336903] forcedeth 0000:00:07.0: highdma pwrctl mgmt lnktim msi 
> desc-v3
> [ 2270.703264] forcedeth 0000:00:07.0: irq 25 for MSI/MSI-X
> [ 2281.216026] eth0: no IPv6 routers present
>
> "lspci -vv":
> <snip>
> 00:07.0 Bridge: nVidia Corporation MCP61 Ethernet (rev a2)
>     Subsystem: Hewlett-Packard Company Device 2a66
>     Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- 
> ParErr- Stepping- SERR- FastB2B- DisINTx-
>     Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- 
> <TAbort- <MAbort- >SERR- <PERR- INTx-
>     Latency: 0 (250ns min, 5000ns max)
>     Interrupt: pin A routed to IRQ 23
>     Region 0: Memory at fe02d000 (32-bit, non-prefetchable) [size=4K]
>     Region 1: I/O ports at ec00 [size=8]
>     Capabilities: <access denied>
>     Kernel driver in use: forcedeth
>     Kernel modules: forcedeth
>
> FEDORA:
> -------------
> "dmesg eth":
> <snip>
> forcedeth: Reverse Engineered nForce ethernet driver. Version 0.64.
> forcedeth 0000:00:07.0: PCI INT A -> Link[APCH] -> GSI 22 (level, low) 
> -> IRQ 22
> forcedeth 0000:00:07.0: setting latency timer to 64
> forcedeth 0000:00:07.0: ifname eth0, PHY OUI 0x732 @ 13, addr 
> 00:1f:c6:04:ec:f0
> forcedeth 0000:00:07.0: highdma pwrctl mgmt lnktim msi desc-v3
> forcedeth 0000:00:07.0: irq 25 for MSI/MSI-X
> eth0: no IPv6 routers present
>
>
> "lspci -vv":
> <snip>
> 00:07.0 Bridge: nVidia Corporation MCP61 Ethernet (rev a2)
>     Subsystem: Hewlett-Packard Company Device 2a66
>     Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- 
> ParErr- Stepping- SERR- FastB2B- DisINTx+
>     Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- 
> <TAbort- <MAbort- >SERR- <PERR- INTx-
>     Latency: 0 (250ns min, 5000ns max)
>     Interrupt: pin A routed to IRQ 25
>     Region 0: Memory at fe02d000 (32-bit, non-prefetchable) [size=4K]
>     Region 1: I/O ports at ec00 [size=8]
>     Capabilities: <access denied>
>     Kernel driver in use: forcedeth
>     Kernel modules: forcedeth
>
> I find it odd that eth0 in fedora ended up with irq 25 rather than 22 
> (from the 2nd line of fedora dmesg), yet in ubuntu eth0 got irq 23 
> (from the 2nd line of ubuntu dmesg) rather than 25.
>
> Is there a clue somewhere in the above?
>
> Thanks,
>
> John.
>
>
> >
> > On Fri, Jan 27, 2012 at 10:13 AM, ted leslie <ted.leslie-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org> 
> wrote:
> > > Compare lspci -xx on the two linux os.
> > > -tl
> > >
> > > On Jan 27, 2012 10:08 AM, <john.moniz-rieW9WUcm8FFJ04o6PK0Fg at public.gmane.org> wrote:
> > >>
> > >> Hello everyone;
> > >>
> > >> After many years of trouble free ethernet connections, I have now 
> lost it
> > >> (in more ways than one) and cannot get an IP address on my Ubuntu 
> set up.
> > >> The condensed version of this story is that it won't connect, 
> regardless of
> > >> whether I try DHCP or static IP address. Ubuntu just won't give 
> me an IP
> > >> address.
> > >>
> > >> On this same box, I also have Vista and Fedora. I am able to 
> connect with
> > >> either, both with DHCP and static address configurations.
> > >>
> > >> Here's a comparison of "dmesg | grep eth" for both Fedora and Ubuntu.
> > >>
> > >> Fedora:
> > >> <snip>
> > >> forcedeth 0000:00:07.0: irq 25 for MSI/MSI-X
> > >> eth0: no IPv6 routers present
> > >>
> > >> Ubuntu:
> > >> <snip>
> > >> [  480.187616] forcedeth 0000:00:07.0: irq 25 for MSI/MSI-X
> > >> [  490.348024] eth0: no[  480.187616] forcedeth 0000:00:07.0: irq 
> 25 for
> > >> MSI/MSI-X
> > >> [  490.348024] eth0: no IPv6 routers present
> > >> [  611.855532] forcedeth 0000:00:07.0: irq 25 for MSI/MSI-X
> > >> [  622.492015] eth0: no IPv6 routers present
> > >>
> > >> I don't like what I see from Ubuntu and I have a feeling that 
> it's not
> > >> good. However, feelings don't fix things and I don't know where 
> to go to fix
> > >> it. I've been at this for days...
> > >>
> > >> Any help would be appreciated. And I can expand the story if 
> necessary,
> > >> just thought I'd zero in on the above first.
> > >>
> > >> Thanks,
> > >>
> > >> John.

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