No network connection

This change was made by a bot.

Did this issue occur in a previous version of Ubuntu, or is this a new issue?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.11 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11-rc7-saucy/

The problem only showed up with the 3.11-0.3 kernel. I'm currently using 3.11.0-2-generic #5 with zero problems. I'll give the upstream kernel a try tomorrow, and report back the results.

kernel-bug-exists-upstream

Thanks for testing. It sounds like this might have been introduced in v3.11-rc6. Can you test the following two upstream kernels:

v3.11-rc5: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11-rc5-saucy/
v3.11-rc6 http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11-rc6-saucy/

I suspect rc5 will have the bug and rc6 will not. I can perform a kernel bisect if that is the case.

I see the following three changes for the skge network driver between rc5 and rc6:

e47851f13d3300f67ca8c7c73780d029ccaa5d74 skge: dma_sync the whole receive buffer
f7b7a365331deb4553944a0b695dd6371614053a skge: fix build on 32 bit
136d8f377e1575463b47840bc5f1b22d94bf8f63 skge: add dma_mapping check

I can confirm that networking does work with kernel 3.11.0-031100rc5-generic #201308112135, and does not work with kernel 3.11.0-031100rc6-generic #201308181835

Thanks for testing. I built three test kernels, each with a commit from comment #7 reverted. Can you test each of these kernels and post back if one of these kernels fixes this bug? The kernels can be downloaded from:

Commit e47851f reverted: http://kernel.ubuntu.com/~jsalisbury/lp1216745/reverts/e47851f/
Commit f7b7a36 reverted: http://kernel.ubuntu.com/~jsalisbury/lp1216745/reverts/f7b7a36/
Commit 136d8f3 reverted: http://kernel.ubuntu.com/~jsalisbury/lp1216745/reverts/136d8f3/

If none of these test kernels resolves this bug, we can perform a bisect to find the commit that introduced this.

Thanks in advance!

This bug might be related but I can't say

https://bugzilla.kernel.org/show_bug.cgi?id=60784

Thanks for the info, Jouni. The upstream bug report mentions commit 136d8f3 as the bad commit. It would be great if you could test that kernel. It can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1216745/reverts/136d8f3

I tested all three reverted kernels, with the following results:

3.11.0-4-generic #9~lp1216745Commite47851Reverted - failed no networking

3.11.0-4-generic #9~lp1216745Commitf7b7a3Reverted - failed no networking

 3.11.0-4-generic #9~lp1216745Commit136d8f3Reverted - success, I'm running it to post this message

Thanks for testing, cariboo907. Your test results seem to confirm what has been reported in the upstream bug. I'll send a message upstream and inquire if commit 136d8f3 should be reverted.

Thanks Joseph. +1 from me reverting this commit in saucy and upstream.

Bugzilla didn't accept this picture.

Please send me the upstream message. I am not subscribed to any kernel mailing lists.

http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-rc2-saucy/ works for me.

Thanks for the update, Jouni. The bug is fixed by the following commit:

commit c194992cbe71c20bb3623a566af8d11b0bfaa721
Author: Mikulas Patocka <email address hidden>
Date: Thu Sep 19 14:13:17 2013 -0400

    skge: fix broken driver

The commit is in 3.12-rc2, but I don't see that it was cc'd to stable. I sent a message upstream and to the patch author to request inclusion in the stable kernels. I'll build a test kernel with this commit to ensure it resolves this bug. I'll post the kernel shortly.

I built a Saucy test kernel with commit c194992c applied. The kernel can be downloaded from:

 http://kernel.ubuntu.com/~jsalisbury/lp1216745/

Can you test this kernel and post back if it resolves the bug? If it does, I will send an SRU request for the Ubuntu kernel.

I just tried the kernel you linked to, and the problem is resolved. I did get a missing dependency error while trying to install the linux-tools-3.11.0-8-generic package, but the system boots OK and networking works. Thanks for your efforts.

This bug was fixed in the package linux - 3.11.0-9.16

---------------
linux (3.11.0-9.16) saucy; urgency=low

  [ Andy Whitcroft ]

  * Revert "SAUCE: (no-up) scsi: hyper-v storage -- mark as preferring READ
    CAPACITY (16) at SPC-2"
  * Revert "SAUCE: (no-up) scsi: hyper-v storage -- mark as VPD capable at
    SPC-2"
  * Revert "SAUCE: (no-up) scsi: add scsi device flag to request READ
    CAPACITY (16) be preferred"
  * Revert "SAUCE: (no-up) scsi: add scsi device flag to request VPD pages
    be used at SPC-2"

  [ Seth Forshee ]

  * SAUCE: (no-up) ACPI: Disable Windows 8 compatibility for some Lenovo
    ThinkPads
    - LP: #1183856

  [ Tim Gardner ]

  * [Config] CONFIG_CRYPTO_CRCT10DIF=y, CONFIG_CRYPTO_CRCT10DIF_PCLMUL=m
  * [packaging] Bump ABI for every new release
  * rebase to v3.11.2
  * Release tracker
    - LP: #1231999

  [ Upstream Kernel Changes ]

  * scsi: hyper-v storsvc switch up to SPC-3
  * perf/x86: Add Silvermont (22nm Atom) support
    - LP: #1091539
  * perf/x86/intel: Fix Silvermont offcore masks
    - LP: #1091539
  * modules: add support for soft module dependencies
    - LP: #1188010
  * Reinstate "crypto: crct10dif - Wrap crc_t10dif function all to use
    crypto transform framework"
    - LP: #1188010
  * skge: fix broken driver
    - LP: #1216745
  * Input: cypress_ps2 - Return zero finger count if palm is detected.
    - LP: #1229361
  * udf: Standardize return values in mount sequence
    - LP: #1228751
  * udf: Refuse RW mount of the filesystem instead of making it RO
    - LP: #1228751
  * rebase to v3.11.2
 -- Tim Gardner <email address hidden> Mon, 23 Sep 2013 07:41:07 -0600