On 11/01/2012 10:58 AM, Shawn Starr wrote: > Hello network driver folks, > > I recently decided to reinstall my Lenovo W500 laptop and found I wasn't able > to get DHCP leases, I wasn't able to install over PXE (when getting the IP a > second time within the OS) > > Fedora is currently using kernel-3.6.2-2.fc18.x86_64 (Pre-beta) > > The only difference I noticed was in my old install of Fedora, I had added > MTU=9000 to the interface config while using a 3.5 kernel, not knowing 3.6.x > seems to break things. > > My Cisco DPC3825 Switch/Cable modem has an MTU setting but this is from Cable > provider <-> WAN interface only. I tried changing to 1500 but by default it > uses this anyway. > > I had noticed tx unit hang errors sometimes, but not when MTU is above 1500. > > PCI info: > > 00:19.0 Ethernet controller: Intel Corporation 82567LM Gigabit Network > Connection (rev 03) > Subsystem: Lenovo Device 20ee > 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 > Interrupt: pin A routed to IRQ 46 > Region 0: Memory at fc000000 (32-bit, non-prefetchable) [size=128K] > Region 1: Memory at fc025000 (32-bit, non-prefetchable) [size=4K] > Region 2: I/O ports at 1840 [size=32] > Capabilities: [c8] Power Management version 2 > Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA > PME(D0+,D1-,D2-,D3hot+,D3cold+) > Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=1 PME- > Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+ > Address: 00000000fee0100c Data: 41a2 > Capabilities: [e0] PCI Advanced Features > AFCap: TP+ FLR+ > AFCtrl: FLR- > AFStatus: TP- > Kernel driver in use: e1000e > > e1000e conversation log: > > [ 12.653816] e1000e: Intel(R) PRO/1000 Network Driver - 2.0.0-k > [ 12.653819] e1000e: Copyright(c) 1999 - 2012 Intel Corporation. > [ 12.653855] e1000e 0000:00:19.0: setting latency timer to 64 > [ 12.653938] e1000e 0000:00:19.0: Interrupt Throttling Rate (ints/sec) set > to dynamic conservative mode > [ 12.653980] e1000e 0000:00:19.0: irq 46 for MSI/MSI-X > [ 12.844121] e1000e 0000:00:19.0: eth0: (PCI Express:2.5GT/s:Width x1) > 00:22:68:0c:96:e3 > [ 12.844124] e1000e 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection > [ 12.844150] e1000e 0000:00:19.0: eth0: MAC: 7, PHY: 8, PBA No: 1008FF-0FF > [ 17.459570] e1000e 0000:00:19.0: eth0: changing MTU from 1500 to 9000 > [ 17.459577] e1000e 0000:00:19.0: Interrupt Throttle Rate turned off > [ 17.948121] e1000e 0000:00:19.0: irq 46 for MSI/MSI-X > [ 18.049164] e1000e 0000:00:19.0: irq 46 for MSI/MSI-X > [ 20.442936] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow > Control: Rx/Tx > > When I set MTU = 1500 (2000 works), it will stop receiving packets, it also > disables Interrupt Throttling when MTU is set higher. > > After testing reasons why it wasn't get a DHCP lease, I decided to bump the > MTU to 9000 for Jumbo Frames and as soon as I did this, I was able to get a > lease and the network functioned resumes receiving packets. > > Can anyone else report regressions or might know whats going on? > > Thanks, > Shawn. Adding e1000-devel mailing list
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