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Upgrading from the previous Ubuntu LTS release to 12.04 broke my
Ethernet connection.

I see these errors in the kernel log:

[  116.800048] ------------[ cut here ]------------
[  116.800066] WARNING: at /build/buildd/linux-3.2.0/net/sched/sch_generic.c:255 dev_watchdog+0x25a/0x270()
[  116.800073] Hardware name: System Product Name
[  116.800079] NETDEV WATCHDOG: eth0 (r8169): transmit queue 0 timed out
[  116.800084] Modules linked in: bnep rfcomm bluetooth dm_crypt snd_hda_codec_hdmi snd_hda_codec_via snd_hda_intel s
nd_hda_codec snd_hwdep snd_pcm binfmt_misc snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_devi
ce snd edac_core sp5100_tco edac_mce_amd i2c_piix4 asus_atk0110 fglrx(P) ppdev soundcore snd_page_alloc parport_pc k1
0temp mac_hid shpchp lp parport vesafb usbhid hid pata_atiixp wmi r8169
[  116.800156] Pid: 0, comm: swapper/3 Tainted: P           O 3.2.0-26-generic #41-Ubuntu
[  116.800162] Call Trace:
[  116.800167]  <IRQ>  [<ffffffff810672af>] warn_slowpath_common+0x7f/0xc0
[  116.800187]  [<ffffffff810673a6>] warn_slowpath_fmt+0x46/0x50
[  116.800197]  [<ffffffff8155f1ba>] dev_watchdog+0x25a/0x270
[  116.800207]  [<ffffffff81110cd0>] ? perf_rotate_context+0x110/0x220
[  116.800216]  [<ffffffff810831a0>] ? __queue_work+0x320/0x320
[  116.800223]  [<ffffffff8155ef60>] ? qdisc_reset+0x50/0x50
[  116.800230]  [<ffffffff8155ef60>] ? qdisc_reset+0x50/0x50
[  116.800239]  [<ffffffff810761b6>] call_timer_fn+0x46/0x160
[  116.800246]  [<ffffffff8155ef60>] ? qdisc_reset+0x50/0x50
[  116.800254]  [<ffffffff81077b02>] run_timer_softirq+0x132/0x2a0
[  116.800263]  [<ffffffff81095235>] ? ktime_get+0x65/0xe0
[  116.800273]  [<ffffffff8106ea58>] __do_softirq+0xa8/0x210
[  116.800280]  [<ffffffff8101a779>] ? read_tsc+0x9/0x20
[  116.800288]  [<ffffffff8109c1c4>] ? tick_program_event+0x24/0x30
[  116.800297]  [<ffffffff8166422c>] call_softirq+0x1c/0x30
[  116.800305]  [<ffffffff81015305>] do_softirq+0x65/0xa0
[  116.800314]  [<ffffffff8106ee3e>] irq_exit+0x8e/0xb0
[  116.800322]  [<ffffffff81664bce>] smp_apic_timer_interrupt+0x6e/0x99
[  116.800330]  [<ffffffff81662a9e>] apic_timer_interrupt+0x6e/0x80
[  116.800335]  <EOI>  [<ffffffff8103cf8b>] ? native_safe_halt+0xb/0x10
[  116.800351]  [<ffffffff8101b983>] default_idle+0x53/0x1d0
[  116.800358]  [<ffffffff81012236>] cpu_idle+0xd6/0x120
[  116.800366]  [<ffffffff81637789>] start_secondary+0xd9/0xdb
[  116.800373] ---[ end trace 151bbfe2ecb4be91 ]---
--- 
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: SB [HDA ATI SB], device 0: VT1708S Analog [VT1708S Analog]
   Subdevices: 2/2
   Subdevice #0: subdevice #0
   Subdevice #1: subdevice #1
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  jcf        1866 F.... pulseaudio
 /dev/snd/controlC0:  jcf        1866 F.... pulseaudio
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xfe8f4000 irq 16'
   Mixer name	: 'VIA VT1708S'
   Components	: 'HDA:11060397,1043836c,00100000'
   Controls      : 44
   Simple ctrls  : 21
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfeae8000 irq 19'
   Mixer name	: 'ATI RS690/780 HDMI'
   Components	: 'HDA:1002791a,00791a00,00100000'
   Controls      : 4
   Simple ctrls  : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=1d3142c2-bc37-420d-b74b-4eb7c1f8acfb
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
IwConfig:
 lo        no wireless extensions.
 
 eth0      no wireless extensions.
MachineType: System manufacturer System Product Name
NonfreeKernelModules: fglrx
Package: linux (not installed)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-26-generic root=UUID=b9250903-5416-42ef-a61e-6e660f30661f ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-26-generic N/A
 linux-backports-modules-3.2.0-26-generic  N/A
 linux-firmware                            1.79
RfKill:
 
SourcePackage: linux
Tags:  precise precise
Uname: Linux 3.2.0-26-generic x86_64
UpgradeStatus: Upgraded to precise on 2012-05-30 (32 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 01/11/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0502
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M4A78L-M
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0502:bd01/11/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A78L-M:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: apport-collected bios-outdated-0801 bot-comment kernel-bug-exists-upstream precise regression-release
-- 
10ec:8168 WARNING: at /build/buildd/linux-3.2.0/net/sched/sch_generic.c:255 dev_watchdog+0x25a/0x270()
https://bugs.launchpad.net/bugs/1019669
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