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[Bug 837076] Re: 8086:422b [Samsung NP900X3A-A01AU] Intel Centrino Ultimate-N 6300 AGN and packet loss using WiFi-N

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Hi,

I've tested the latest upstream kernel and it seems the problem still
exists.

[hloeung@darkon tmp]$ uname -a
Linux darkon 3.11.10-03111001-generic #201312110635 SMP Wed Dec 11 11:35:43 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

(from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11.10.1-saucy/)

Without 11n_disable=1:

| [hloeung@darkon tmp]$ ping 203.12.160.35 -c 100 | grep -v 'ttl=[[:digit:]]\+[[:space:]]time=[[:digit:]]\{2\}\.'
| PING 203.12.160.35 (203.12.160.35) 56(84) bytes of data.
| 64 bytes from 203.12.160.35: icmp_seq=13 ttl=227 time=1492 ms
| 64 bytes from 203.12.160.35: icmp_seq=14 ttl=227 time=502 ms
| 64 bytes from 203.12.160.35: icmp_seq=18 ttl=227 time=1979 ms
| 64 bytes from 203.12.160.35: icmp_seq=19 ttl=227 time=1001 ms
| 64 bytes from 203.12.160.35: icmp_seq=20 ttl=227 time=1595 ms
| 64 bytes from 203.12.160.35: icmp_seq=21 ttl=227 time=636 ms
| 64 bytes from 203.12.160.35: icmp_seq=26 ttl=227 time=1661 ms
| 64 bytes from 203.12.160.35: icmp_seq=27 ttl=227 time=701 ms
| 64 bytes from 203.12.160.35: icmp_seq=31 ttl=227 time=1321 ms
| 64 bytes from 203.12.160.35: icmp_seq=33 ttl=227 time=565 ms
| 64 bytes from 203.12.160.35: icmp_seq=50 ttl=227 time=719 ms
| 64 bytes from 203.12.160.35: icmp_seq=54 ttl=227 time=1503 ms
| 64 bytes from 203.12.160.35: icmp_seq=55 ttl=227 time=512 ms
| 64 bytes from 203.12.160.35: icmp_seq=56 ttl=227 time=602 ms
| 64 bytes from 203.12.160.35: icmp_seq=60 ttl=227 time=1500 ms
| 64 bytes from 203.12.160.35: icmp_seq=61 ttl=227 time=517 ms
| 64 bytes from 203.12.160.35: icmp_seq=62 ttl=227 time=961 ms
| 64 bytes from 203.12.160.35: icmp_seq=76 ttl=227 time=1439 ms
| 64 bytes from 203.12.160.35: icmp_seq=77 ttl=227 time=450 ms
| 64 bytes from 203.12.160.35: icmp_seq=82 ttl=227 time=1442 ms
| 64 bytes from 203.12.160.35: icmp_seq=83 ttl=227 time=454 ms
| 64 bytes from 203.12.160.35: icmp_seq=88 ttl=227 time=1214 ms
| 64 bytes from 203.12.160.35: icmp_seq=89 ttl=227 time=214 ms
| 64 bytes from 203.12.160.35: icmp_seq=93 ttl=227 time=1182 ms
| 64 bytes from 203.12.160.35: icmp_seq=94 ttl=227 time=667 ms
| 64 bytes from 203.12.160.35: icmp_seq=100 ttl=227 time=1384 ms
|
| --- 203.12.160.35 ping statistics ---
| 100 packets transmitted, 97 received, 3% packet loss, time 99188ms
| rtt min/avg/max/mdev = 17.821/287.165/1979.984/501.613 ms, pipe 2
|
| [hloeung@darkon tmp]$ iwconfig
| lo        no wireless extensions.
|
| wlan0     IEEE 802.11abgn  ESSID:"star-local-5GHz"
|           Mode:Managed  Frequency:5.22 GHz  Access Point: C0:25:06:A6:31:0E
|           Bit Rate=240 Mb/s   Tx-Power=15 dBm
|           Retry  long limit:7   RTS thr:off   Fragment thr:off
|           Power Management:off
|           Link Quality=61/70  Signal level=-49 dBm
|           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
|           Tx excessive retries:18288  Invalid misc:21   Missed beacon:0

Notice the high Tx excessive retries? Now iwlwifi module reloaded with
11n_disable=1:

| [hloeung@darkon tmp]$ ping 203.12.160.35 -c 100 | grep -v 'ttl=[[:digit:]]\+[[:space:]]time=[[:digit:]]\{2\}\.'
| PING 203.12.160.35 (203.12.160.35) 56(84) bytes of data.
|
| --- 203.12.160.35 ping statistics ---
| 100 packets transmitted, 100 received, 0% packet loss, time 99148ms
| rtt min/avg/max/mdev = 14.929/22.947/62.614/11.495 ms
|
| [hloeung@darkon tmp]$ iwconfig
| lo        no wireless extensions.
|
| wlan0     IEEE 802.11abg  ESSID:"star-local-5GHz"
|           Mode:Managed  Frequency:5.22 GHz  Access Point: C0:25:06:A6:31:0E
|           Bit Rate=54 Mb/s   Tx-Power=15 dBm
|           Retry  long limit:7   RTS thr:off   Fragment thr:off
|           Power Management:on
|           Link Quality=61/70  Signal level=-49 dBm
|           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
|           Tx excessive retries:0  Invalid misc:155   Missed beacon:0


Hope this helps.


Regards,

Haw

** Tags removed: needs-upstream-testing
** Tags added: kernel-bug-exists-upstream kernel-bug-exists-upstream-v3.11.10.1-saucy

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/837076

Title:
  8086:422b [Samsung NP900X3A-A01AU] Intel Centrino Ultimate-N 6300 AGN
  and packet loss using WiFi-N

Status in The Linux Kernel:
  New
Status in “linux” package in Ubuntu:
  Incomplete
Status in “linux” source package in Saucy:
  Confirmed

Bug description:
  I have recently swapped the internal WiFi adapter with an Ultimate-N 6300 and I'm seeing a lot of packet loss. Some additional info is as follows:
  wlan1     IEEE 802.11abgn  ESSID:"star-local"
            Mode:Managed  Frequency:2.412 GHz  Access Point: 00:22:75:29:EC:61
            Bit Rate=121.5 Mb/s   Tx-Power=15 dBm
            Retry  long limit:7   RTS thr:off   Fragment thr:off
            Power Management:off
            Link Quality=49/70  Signal level=-61 dBm
            Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
            Tx excessive retries:205  Invalid misc:5   Missed beacon:0

  $ ping -c 20 192.168.2.1
  PING 192.168.2.1 (192.168.2.1) 56(84) bytes of data.
  64 bytes from 192.168.2.1: icmp_req=1 ttl=64 time=3.83 ms
  64 bytes from 192.168.2.1: icmp_req=2 ttl=64 time=2.56 ms
  64 bytes from 192.168.2.1: icmp_req=3 ttl=64 time=2.59 ms
  64 bytes from 192.168.2.1: icmp_req=4 ttl=64 time=2.57 ms
  64 bytes from 192.168.2.1: icmp_req=5 ttl=64 time=3.23 ms
  64 bytes from 192.168.2.1: icmp_req=6 ttl=64 time=3.13 ms
  64 bytes from 192.168.2.1: icmp_req=7 ttl=64 time=4.04 ms
  64 bytes from 192.168.2.1: icmp_req=11 ttl=64 time=3.89 ms
  64 bytes from 192.168.2.1: icmp_req=12 ttl=64 time=3.80 ms
  64 bytes from 192.168.2.1: icmp_req=13 ttl=64 time=82.4 ms
  64 bytes from 192.168.2.1: icmp_req=14 ttl=64 time=105 ms
  64 bytes from 192.168.2.1: icmp_req=15 ttl=64 time=2.57 ms
  64 bytes from 192.168.2.1: icmp_req=16 ttl=64 time=2.97 ms
  64 bytes from 192.168.2.1: icmp_req=17 ttl=64 time=2.57 ms
  64 bytes from 192.168.2.1: icmp_req=18 ttl=64 time=2.57 ms
  64 bytes from 192.168.2.1: icmp_req=19 ttl=64 time=3.94 ms
  64 bytes from 192.168.2.1: icmp_req=20 ttl=64 time=3.51 ms

  --- 192.168.2.1 ping statistics ---
  20 packets transmitted, 17 received, 15% packet loss, time 19028ms
  rtt min/avg/max/mdev = 2.567/13.879/105.633/29.547 ms

  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/837076/+attachment/3929375/+files/log

  WORKAROUND: Remove and reload the module with "11n_disable=1".

  wlan1     IEEE 802.11abg  ESSID:"star-local"
            Mode:Managed  Frequency:2.412 GHz  Access Point: 00:22:75:29:EC:61
            Bit Rate=54 Mb/s   Tx-Power=15 dBm
            Retry  long limit:7   RTS thr:off   Fragment thr:off
            Power Management:off
            Link Quality=49/70  Signal level=-61 dBm
            Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
            Tx excessive retries:0  Invalid misc:32   Missed beacon:0

  $ ping -c 20 192.168.2.1
  PING 192.168.2.1 (192.168.2.1) 56(84) bytes of data.
  64 bytes from 192.168.2.1: icmp_req=1 ttl=64 time=1.82 ms
  64 bytes from 192.168.2.1: icmp_req=2 ttl=64 time=1.17 ms
  64 bytes from 192.168.2.1: icmp_req=3 ttl=64 time=1.80 ms
  64 bytes from 192.168.2.1: icmp_req=4 ttl=64 time=0.650 ms
  64 bytes from 192.168.2.1: icmp_req=5 ttl=64 time=1.52 ms
  64 bytes from 192.168.2.1: icmp_req=6 ttl=64 time=2.29 ms
  64 bytes from 192.168.2.1: icmp_req=7 ttl=64 time=1.29 ms
  64 bytes from 192.168.2.1: icmp_req=8 ttl=64 time=1.65 ms
  64 bytes from 192.168.2.1: icmp_req=9 ttl=64 time=1.70 ms
  64 bytes from 192.168.2.1: icmp_req=10 ttl=64 time=1.06 ms
  64 bytes from 192.168.2.1: icmp_req=11 ttl=64 time=1.52 ms
  64 bytes from 192.168.2.1: icmp_req=12 ttl=64 time=1.49 ms
  64 bytes from 192.168.2.1: icmp_req=13 ttl=64 time=1.89 ms
  64 bytes from 192.168.2.1: icmp_req=14 ttl=64 time=1.46 ms
  64 bytes from 192.168.2.1: icmp_req=15 ttl=64 time=1.41 ms
  64 bytes from 192.168.2.1: icmp_req=16 ttl=64 time=1.28 ms
  64 bytes from 192.168.2.1: icmp_req=17 ttl=64 time=1.40 ms
  64 bytes from 192.168.2.1: icmp_req=18 ttl=64 time=0.946 ms
  64 bytes from 192.168.2.1: icmp_req=19 ttl=64 time=1.32 ms
  64 bytes from 192.168.2.1: icmp_req=20 ttl=64 time=1.32 ms

  --- 192.168.2.1 ping statistics ---
  20 packets transmitted, 20 received, 0% packet loss, time 19026ms
  rtt min/avg/max/mdev = 0.650/1.453/2.291/0.356 ms

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-9-generic 3.0.0-9.14
  ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3
  Uname: Linux 3.0.0-9-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  hloeung    2208 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xc0700000 irq 48'
     Mixer name	: 'Intel CougarPoint HDMI'
     Components	: 'HDA:10ec0269,144dc098,00100100 HDA:80862805,80860101,00100000'
     Controls      : 18
     Simple ctrls  : 10
  Date: Tue Aug 30 09:21:33 2011
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110413)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 90X3A
  ProcEnviron:
   LANGUAGE=en_AU:en_GB:en
   PATH=(custom, no user)
   LANG=en_AU.UTF-8
   LC_MESSAGES=en_AU.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-9-generic root=UUID=b4df4065-2b5c-4a10-9c50-4d01d05d09c3 ro elevator=deadline apparmor=0 quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.0.0-9-generic N/A
   linux-backports-modules-3.0.0-9-generic  N/A
   linux-firmware                           1.60
  RfKill:
   7: phy7: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: Upgraded to oneiric on 2011-08-08 (21 days ago)
  dmi.bios.date: 03/08/2011
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: 04HL
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 90X3A
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr04HL:bd03/08/2011:svnSAMSUNGELECTRONICSCO.,LTD.:pn90X3A:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rn90X3A:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
  dmi.product.name: 90X3A
  dmi.product.version: 0.1
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
  ---
  ApportVersion: 2.12.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  hloeung    1724 F.... pulseaudio
  DistroRelease: Ubuntu 13.10
  Lsusb:
   Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 90X3A
  MarkForUpload: True
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-7-generic root=UUID=b4df4065-2b5c-4a10-9c50-4d01d05d09c3 ro quiet splash elevator=noop apparmor=0 pcie_aspm=force i915.i915_enable_rc6=7 i915.i915_enable_fbc=1 i915.lvds_downclock=1 drm.vblankoffdelay=1 intel_pstate=enable zswap.enabled=1 vt.handoff=7
  ProcVersionSignature: Ubuntu 3.11.0-7.13-generic 3.11.0
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-7-generic N/A
   linux-backports-modules-3.11.0-7-generic  N/A
   linux-firmware                            1.113
  StagingDrivers: zram
  Tags:  saucy staging
  Uname: Linux 3.11.0-7-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm admin audio cdrom dialout libvirtd lpadmin netdev plugdev sambashare users video
  dmi.bios.date: 03/08/2011
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: 04HL
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 90X3A
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr04HL:bd03/08/2011:svnSAMSUNGELECTRONICSCO.,LTD.:pn90X3A:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rn90X3A:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
  dmi.product.name: 90X3A
  dmi.product.version: 0.1
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
  ---
  ApportVersion: 2.12.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  hloeung    1724 F.... pulseaudio
  DistroRelease: Ubuntu 13.10
  Lsusb:
   Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 90X3A
  MarkForUpload: True
  Package: linux
  PackageArchitecture: amd64
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-7-generic root=UUID=b4df4065-2b5c-4a10-9c50-4d01d05d09c3 ro quiet splash elevator=noop apparmor=0 pcie_aspm=force i915.i915_enable_rc6=7 i915.i915_enable_fbc=1 i915.lvds_downclock=1 drm.vblankoffdelay=1 intel_pstate=enable zswap.enabled=1 vt.handoff=7
  ProcVersionSignature: Ubuntu 3.11.0-7.13-generic 3.11.0
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-7-generic N/A
   linux-backports-modules-3.11.0-7-generic  N/A
   linux-firmware                            1.113
  StagingDrivers: zram
  Tags:  saucy staging
  Uname: Linux 3.11.0-7-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm admin audio cdrom dialout libvirtd lpadmin netdev plugdev sambashare users video
  dmi.bios.date: 03/08/2011
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: 04HL
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 90X3A
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr04HL:bd03/08/2011:svnSAMSUNGELECTRONICSCO.,LTD.:pn90X3A:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rn90X3A:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
  dmi.product.name: 90X3A
  dmi.product.version: 0.1
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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