>From the Linux kernel point of view, changing the BIOS option is not a good fix, and "pci=realloc=off" is just a workaround and not a real fix either. Linux should be able to work even without that, or at least give meaningful error messages.
The original problem appears to be that: - BIOS allocated space for the normal PCI BARs 0, 2 and 4, but not for the SR-IOV VF BARs, - Linux tried to allocate space for the SR-IOV BARs, but failed, and - Linux removed even the space allocated for the normal PCI BARs Here's the initial state Linux found: pci 0000:22:00.0: [8086:10fb] type 00 class 0x020000 pci 0000:22:00.0: reg 0x10: [mem 0xe9400000-0xe947ffff 64bit] # BAR 0 pci 0000:22:00.0: reg 0x18: [io 0xdcc0-0xdcdf] # BAR 2 pci 0000:22:00.0: reg 0x20: [mem 0xe95f8000-0xe95fbfff 64bit] # BAR 4 pci 0000:22:00.0: reg 0x30: [mem 0xe9500000-0xe957ffff pref] # ROM BAR pci 0000:22:00.0: reg 0x184: [mem 0x00000000-0x00003fff 64bit] # SR-IOV BAR pci 0000:22:00.0: reg 0x190: [mem 0x00000000-0x00003fff 64bit] # SR-IOV BAR After trying to move things around to provide space for the SR-IOV BARs: pci 0000:22:00.0: BAR 0: can't assign mem (size 0x80000) # BAR 0 pci 0000:22:00.0: BAR 4: can't assign mem (size 0x4000) # BAR 4 pci 0000:22:00.0: BAR 7: can't assign mem (size 0x100000) # SR-IOV BAR pci 0000:22:00.0: BAR 10: can't assign mem (size 0x100000) # SR-IOV BAR This may have been fixed by changes in the resource assignment code. I don't remember similar recent problem reports. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1245938 Title: Intel x520 NIC's (ixgbe) stop working in 12.10, 13.04, 13.10 Status in linux package in Ubuntu: Confirmed Status in linux source package in Quantal: Won't Fix Status in linux source package in Raring: Won't Fix Status in linux source package in Saucy: Won't Fix Status in linux source package in Trusty: Confirmed Bug description: We have a server (Dell R715) with two Intel x520 NIC's. If we run Ubuntu 12.04 on it, the NIC's works flawlessly (with stock kernel driver or with Intel compiled one), but if we upgrade release to 12.10, 13.04 or 13.10, the NIC's stop working: either stock or Intel drivers fails with error: [ 226.395766] Intel(R) 10 Gigabit PCI Express Network Driver - version 3.18.7 [ 226.395770] Copyright (c) 1999-2013 Intel Corporation. [ 226.395980] ixgbe: probe of 0000:22:00.0 failed with error -5 [ 226.396092] ixgbe: probe of 0000:22:00.1 failed with error -5 [ 226.396203] ixgbe: probe of 0000:23:00.0 failed with error -5 [ 226.396311] ixgbe: probe of 0000:23:00.1 failed with error -5 I contacted Intel developers and they responded: "Hey Fernando, We (ixgbe) only returns EIO (error 5) for a couple of reasons. 1) When we fail to io map (ioremap) 2) If the eeprom checksum is incorrect. 3) If the MAC address from the checksum is invalid Reasons 2 and 3 are related to the NIC's eeprom so if they worked with another system they should still be fine now. If you really wanted to verify you could try out the NIC's on a known good system again to see if the eeprom somehow got corrupted. That pretty much leaves us with ioremap returning an error. I'm not at all sure why your Ubuntu release would not like the way we are calling ioremap, but it might give you a place to start looking in Ubuntu changes. Thanks, -Don" If the server boot with kernel 3.2.0-55 (from grub menu) both NIC's works fine. Please let me know how can I help! Regards Fernando To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1245938/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp