I am running ubuntu 12.04 with all latest updates and have intalled the daily 
build kernel: 3.10.0-031000-generic #201306301935 SMP Sun Jun 30 23:36:16 UTC 
2013 x86_64 x86_64 x86_64 GNU/Linux 
from kernel packages:
linux-headers-3.10.0-999_3.10.0-999.201307110431_all.deb
linux-headers-3.10.0-999-generic_3.10.0-999.201307110431_amd64.deb
linux-image-3.10.0-999-generic_3.10.0-999.201307110431_amd64.deb

I have also created and installed most recent versions of:
libnl-3.2.22
network-manager 0.9.8.2
wpasupplicant 2.0

But still get disconnects like this:

Jul 12 18:19:27 vault NetworkManager[1491]: <warn> nl_recvmsgs() error: (-33) 
Dump inconsistency detected, interrupted
Jul 12 18:25:29 vault NetworkManager[1491]: <warn> nl_recvmsgs() error: (-33) 
Dump inconsistency detected, interrupted
Jul 12 18:41:27 vault NetworkManager[1491]: <warn> nl_recvmsgs() error: (-33) 
Dump inconsistency detected, interrupted
Jul 12 19:10:56 vault nm-openvpn[11225]: read TCPv4_CLIENT []: No route to host 
(code=113)
Jul 12 19:11:26 vault kernel: [30858.358269] iwlwifi 0000:03:00.0: fail to 
flush all tx fifo queues Q 11
Jul 12 19:11:26 vault kernel: [30858.358281] iwlwifi 0000:03:00.0: Current SW 
read_ptr 13 write_ptr 19
Jul 12 19:11:26 vault kernel: [30858.358363] iwl data: 00000000: 00 e0 07 00 00 
c0 03 00 00 00 00 00 00 00 00 00  ................
Jul 12 19:11:26 vault kernel: [30858.358396] iwlwifi 0000:03:00.0: FH TRBs(0) = 
0x00000000
Jul 12 19:11:26 vault kernel: [30858.358431] iwlwifi 0000:03:00.0: FH TRBs(1) = 
0xc010b012
Jul 12 19:11:26 vault kernel: [30858.358466] iwlwifi 0000:03:00.0: FH TRBs(2) = 
0x8020100a
Jul 12 19:11:26 vault kernel: [30858.358501] iwlwifi 0000:03:00.0: FH TRBs(3) = 
0x803000e5
Jul 12 19:11:26 vault kernel: [30858.358536] iwlwifi 0000:03:00.0: FH TRBs(4) = 
0x00000000
Jul 12 19:11:26 vault kernel: [30858.358569] iwlwifi 0000:03:00.0: FH TRBs(5) = 
0x00000000
Jul 12 19:11:26 vault kernel: [30858.358602] iwlwifi 0000:03:00.0: FH TRBs(6) = 
0x00000000
Jul 12 19:11:26 vault kernel: [30858.358633] iwlwifi 0000:03:00.0: FH TRBs(7) = 
0x00704034
Jul 12 19:11:26 vault kernel: [30858.358751] iwlwifi 0000:03:00.0: Q 0 is 
active and mapped to fifo 3 ra_tid 0x0000 [230,230]
Jul 12 19:11:26 vault kernel: [30858.358871] iwlwifi 0000:03:00.0: Q 1 is 
active and mapped to fifo 2 ra_tid 0x0000 [11,11]
Jul 12 19:11:26 vault kernel: [30858.358992] iwlwifi 0000:03:00.0: Q 2 is 
active and mapped to fifo 1 ra_tid 0x0000 [133,133]
Jul 12 19:11:26 vault kernel: [30858.359113] iwlwifi 0000:03:00.0: Q 3 is 
active and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:26 vault kernel: [30858.359233] iwlwifi 0000:03:00.0: Q 4 is 
active and mapped to fifo 7 ra_tid 0x0000 [53,53]
Jul 12 19:11:26 vault kernel: [30858.359355] iwlwifi 0000:03:00.0: Q 5 is 
inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:26 vault kernel: [30858.359476] iwlwifi 0000:03:00.0: Q 6 is 
inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:26 vault kernel: [30858.359597] iwlwifi 0000:03:00.0: Q 7 is 
inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:26 vault kernel: [30858.359715] iwlwifi 0000:03:00.0: Q 8 is 
inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:26 vault kernel: [30858.359835] iwlwifi 0000:03:00.0: Q 9 is 
inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:26 vault kernel: [30858.359957] iwlwifi 0000:03:00.0: Q 10 is 
inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:26 vault kernel: [30858.360134] iwlwifi 0000:03:00.0: Q 11 is 
active and mapped to fifo 1 ra_tid 0x0000 [13,19]
Jul 12 19:11:26 vault kernel: [30858.360255] iwlwifi 0000:03:00.0: Q 12 is 
inactive and mapped to fifo 3 ra_tid 0x0006 [90,90]
Jul 12 19:11:26 vault kernel: [30858.360376] iwlwifi 0000:03:00.0: Q 13 is 
inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:26 vault kernel: [30858.360493] iwlwifi 0000:03:00.0: Q 14 is 
inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:26 vault kernel: [30858.360613] iwlwifi 0000:03:00.0: Q 15 is 
inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:26 vault kernel: [30858.360733] iwlwifi 0000:03:00.0: Q 16 is 
inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:26 vault kernel: [30858.360854] iwlwifi 0000:03:00.0: Q 17 is 
inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:26 vault kernel: [30858.360971] iwlwifi 0000:03:00.0: Q 18 is 
inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:26 vault kernel: [30858.361091] iwlwifi 0000:03:00.0: Q 19 is 
inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
Jul 12 19:11:28 vault NetworkManager[1491]: <warn> Connection disconnected 
(reason -4)
Jul 12 19:11:28 vault kernel: [30860.014716] cfg80211: Calling CRDA to update 
world regulatory domain
Jul 12 19:11:28 vault NetworkManager[1491]: <info> (wlan0): roamed from BSSID 
64:70:02:AB:35:FE (UaE2) to (none) ((none))
Jul 12 19:11:28 vault NetworkManager[1491]: <info> (wlan0): supplicant 
interface state: completed -> disconnected
Jul 12 19:11:28 vault kernel: [30860.023768] cfg80211: World regulatory domain 
updated:
Jul 12 19:11:28 vault kernel: [30860.023775] cfg80211:   (start_freq - end_freq 
@ bandwidth), (max_antenna_gain, max_eirp)
Jul 12 19:11:28 vault kernel: [30860.023781] cfg80211:   (2402000 KHz - 2472000 
KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Jul 12 19:11:28 vault kernel: [30860.023785] cfg80211:   (2457000 KHz - 2482000 
KHz @ 20000 KHz), (300 mBi, 2000 mBm)
Jul 12 19:11:28 vault kernel: [30860.023789] cfg80211:   (2474000 KHz - 2494000 
KHz @ 20000 KHz), (300 mBi, 2000 mBm)
Jul 12 19:11:28 vault kernel: [30860.023793] cfg80211:   (5170000 KHz - 5250000 
KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Jul 12 19:11:28 vault kernel: [30860.023797] cfg80211:   (5735000 KHz - 5835000 
KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Jul 12 19:11:28 vault kernel: [30860.751421] wlan0: authenticate with 
64:70:02:ab:35:fe
Jul 12 19:11:28 vault NetworkManager[1491]: <info> (wlan0): supplicant 
interface state: disconnected -> authenticating
Jul 12 19:11:28 vault kernel: [30860.763044] wlan0: send auth to 
64:70:02:ab:35:fe (try 1/3)
Jul 12 19:11:28 vault kernel: [30860.764765] wlan0: authenticated
Jul 12 19:11:28 vault kernel: [30860.766338] wlan0: associate with 
64:70:02:ab:35:fe (try 1/3)
Jul 12 19:11:28 vault NetworkManager[1491]: <info> (wlan0): supplicant 
interface state: authenticating -> associating
Jul 12 19:11:28 vault kernel: [30860.774395] wlan0: RX AssocResp from 
64:70:02:ab:35:fe (capab=0x411 status=0 aid=1)
Jul 12 19:11:28 vault kernel: [30860.793973] wlan0: associated
Jul 12 19:11:28 vault kernel: [30860.794095] cfg80211: Calling CRDA for 
country: SK
Jul 12 19:11:28 vault NetworkManager[1491]: <info> (wlan0): supplicant 
interface state: associating -> 4-way handshake
Jul 12 19:11:28 vault kernel: [30860.798372] cfg80211: Regulatory domain 
changed to country: SK
Jul 12 19:11:28 vault kernel: [30860.798375] cfg80211:   (start_freq - end_freq 
@ bandwidth), (max_antenna_gain, max_eirp)
Jul 12 19:11:28 vault kernel: [30860.798376] cfg80211:   (2402000 KHz - 2482000 
KHz @ 40000 KHz), (N/A, 2000 mBm)
Jul 12 19:11:28 vault kernel: [30860.798378] cfg80211:   (5170000 KHz - 5250000 
KHz @ 40000 KHz), (N/A, 2000 mBm)
Jul 12 19:11:28 vault kernel: [30860.798379] cfg80211:   (5250000 KHz - 5330000 
KHz @ 40000 KHz), (N/A, 2000 mBm)
Jul 12 19:11:28 vault kernel: [30860.798380] cfg80211:   (5490000 KHz - 5710000 
KHz @ 40000 KHz), (N/A, 2700 mBm)
Jul 12 19:11:28 vault NetworkManager[1491]: <info> (wlan0): supplicant 
interface state: 4-way handshake -> completed
Jul 12 19:11:28 vault NetworkManager[1491]: <info> (wlan0): roamed from BSSID 
(none) ((none)) to 64:70:02:AB:35:FE (UaE2)

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https://bugs.launchpad.net/bugs/1167019

Title:
  wifi packet loss on intel Centrino Wireless-N 1000

Status in “linux” package in Ubuntu:
  Incomplete
Status in “network-manager” package in Ubuntu:
  Confirmed

Bug description:
  Sat on a wifi network with another non-Linux machine nearby on the
  same access point. The Linux machine (Ubuntu 13.04 up to date) drops
  off the network repeatedly. Network manager shows a constant
  connection. mtr shows packet loss.

                               My traceroute  [v0.82]
  deep-thought (0.0.0.0)                                 Tue Apr  9 22:27:30 
2013
  Keys:  Help   Display mode   Restart statistics   Order of fields   quit
                                         Packets               Pings
   Host                                Loss%   Snt   Last   Avg  Best  Wrst 
StDev
   1. 192.168.1.1                      41.5%   316    7.1   7.2   4.8  23.5   
1.7
   2. cpc8-farn5-2-0-gw.6-2.cable.virg 41.3%   315   59.9  32.5  13.0 302.8  
34.4
   3. glfd-core-2b-ae3-4033.network.vi 41.3%   315   18.0  26.2  12.9 146.1  
20.3
   4. glfd-bb-1b-ae6-0.network.virginm 41.3%   315   18.0  22.3  13.0 133.9  
16.0
   5. glfd-bb-1a-ae0-0.network.virginm 41.3%   315   24.3  24.4  11.8 131.7  
18.5
   6. nrth-bb-1b-ae4-0.network.virginm 41.6%   315   18.3  28.8  15.7 177.1  
21.2
   7. tele-ic-4-ae0-0.network.virginme 41.6%   315   27.7  29.2  17.2 146.9  
18.5
   8. linx-gw-a.jump.net.uk            41.6%   315   21.0  27.6  18.4 128.6  
15.7
   9. dunkel.bitfolk.com               41.3%   315   20.9  25.9  18.4 132.7  
13.1
  10. popey.com                        41.6%   315   22.6  27.2  17.4 149.9  
17.3

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-17-generic 3.8.0-17.27
  ProcVersionSignature: Ubuntu 3.8.0-17.27-generic 3.8.6
  Uname: Linux 3.8.0-17-generic x86_64
  ApportVersion: 2.9.2-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  alan       2823 F.... pulseaudio
  Date: Tue Apr  9 22:22:16 2013
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=4de844e6-b3a9-4309-bc26-739bea6b4146
  InstallationDate: Installed on 2012-06-29 (284 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 
(20120425)
  MachineType: LENOVO 4287CTO
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-17-generic 
root=UUID=c8438547-b9fb-46af-8012-4663c77c70e7 ro quiet splash 
i915.semaphores=0 vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-17-generic N/A
   linux-backports-modules-3.8.0-17-generic  N/A
   linux-firmware                            1.104
  SourcePackage: linux
  UpgradeStatus: Upgraded to raring on 2013-01-18 (81 days ago)
  dmi.bios.date: 12/05/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8DET67WW (1.37 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 4287CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvr8DET67WW(1.37):bd12/05/2012:svnLENOVO:pn4287CTO:pvrThinkPadX220:rvnLENOVO:rn4287CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4287CTO
  dmi.product.version: ThinkPad X220
  dmi.sys.vendor: LENOVO

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