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[Boris Rybalkin <ribalkin@xxxxxxxxx>]

Wifi is very slow, but ethernet is OK.

Upload:
wifi: ~30 KiB/s
ethernet: ~400 KiB/s

Tried Kubuntu 10.04 Live CD - wifi speed is good.

I am ready to do any testing as this is my wife's laptop and she wants
to switch back to slow Vista :)

$ lspci 
00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub (rev 0c)
00:01.0 PCI bridge: Intel Corporation Mobile PM965/GM965/GL960 PCI Express Root Port (rev 0c)
00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 2 (rev 03)
00:1c.5 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 6 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f3)
00:1f.0 ISA bridge: Intel Corporation 82801HEM (ICH8M) LPC Interface Controller (rev 03)
00:1f.1 IDE interface: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) IDE Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) SATA AHCI Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller (rev 03)
01:00.0 VGA compatible controller: nVidia Corporation G86 [GeForce 8400M GS] (rev a1)
02:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61)
08:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 01)
09:09.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 05)
09:09.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22)
09:09.2 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 12)
09:09.3 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 12)

$ uname -a
Linux nata 3.0.0-12-generic #19-Ubuntu SMP Fri Sep 23 21:23:39 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

syslog:
Oct  6 21:23:58 nata NetworkManager[1096]: <info> (eth0): carrier now OFF (device state 100, deferring action for 4 seconds)
Oct  6 21:24:03 nata NetworkManager[1096]: <info> (eth0): device state change: activated -> unavailable (reason 'carrier-changed') [100 20 40]
Oct  6 21:24:03 nata NetworkManager[1096]: <info> (eth0): deactivating device (reason 'carrier-changed') [40]
Oct  6 21:24:03 nata NetworkManager[1096]: <info> (eth0): canceled DHCP transaction, DHCP client pid 7928
Oct  6 21:24:03 nata avahi-daemon[1085]: Withdrawing address record for 192.168.1.105 on eth0.
Oct  6 21:24:03 nata avahi-daemon[1085]: Leaving mDNS multicast group on interface eth0.IPv4 with address 192.168.1.105.
Oct  6 21:24:03 nata avahi-daemon[1085]: Interface eth0.IPv4 no longer relevant for mDNS.
Oct  6 21:24:03 nata NetworkManager[1096]: <info> Policy set 'rnet' (wlan0) as default for IPv4 routing and DNS.
Oct  6 21:24:03 nata NetworkManager[1096]: <info> Policy set 'rnet' (wlan0) as default for IPv4 routing and DNS.
Oct  6 21:24:03 nata dbus[1037]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper)
Oct  6 21:24:03 nata dbus[1037]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Oct  6 21:24:37 nata kernel: [16047.869583] iwl4965 0000:02:00.0: Aggregation not enabled for tid 0 because load = 1
Oct  6 21:25:03 nata kernel: [16074.744717] iwl4965 0000:02:00.0: Aggregation not enabled for tid 0 because load = 0
Oct  6 21:25:21 nata kernel: [16092.109599] iwl4965 0000:02:00.0: Aggregation not enabled for tid 0 because load = 0
Oct  6 21:25:59 nata kernel: [16130.274538] CPU1: Core temperature above threshold, cpu clock throttled (total events = 53377)
Oct  6 21:25:59 nata kernel: [16130.275513] CPU1: Core temperature/speed normal
Oct  6 21:26:03 nata kernel: [16133.812832] iwl4965 0000:02:00.0: Aggregation not enabled for tid 0 because load = 0
Oct  6 21:26:06 nata kernel: [16137.116073] iwl4965 0000:02:00.0: iwl4965_tx_agg_start on ra = bc:ae:c5:c3:6b:28 tid = 0
Oct  6 21:27:09 nata kernel: [16199.816095] [Hardware Error]: Machine check events logged

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/836250

Title:
  [Oneiric] Intel Corporation Centrino Ultimate-N 6300 poor networking,
  packet loss and very slow Lenovo X201 and T500 laptops

Status in “linux” package in Ubuntu:
  Confirmed
Status in “network-manager” package in Ubuntu:
  Confirmed
Status in “linux” source package in Oneiric:
  Confirmed
Status in “network-manager” source package in Oneiric:
  Confirmed
Status in “linux” source package in p-series:
  Confirmed
Status in “network-manager” source package in p-series:
  Confirmed

Bug description:
  This may be either network-manager or kernel, depending on triage...

  I have verified this on both a Lenovo X201 and a Lenovo T500 laptop.

  Both work perfectly with fully updated 10.10 and 11.04 versions of
  Ubuntu.

  However, booting into a fully updated 11.10 (as of 28/08/11) I get
  very poor wireless networking performance. Between 6-10% packet loss,
  very very slow connection and transfer rate. All in all, practically
  unusable.

  I have reported the bug on the X201 laptop, I will add the similar
  logs from the T500 also if required.

  As soon as I swap back to either 10.10 or 11.04 I get perfect
  wireless, it's only on 11.10 that I get problems, this would suggest
  it's not hardware or configuration on my side.

  I have had this since first installing 11.10 which was a little after
  Alpha 2.

  Wired connection is fine.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: network-manager 0.9.0-0ubuntu1
  ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3
  Uname: Linux 3.0.0-9-generic x86_64
  Architecture: amd64
  CRDA: Error: [Errno 2] No such file or directory
  Date: Sun Aug 28 21:26:05 2011
  EcryptfsInUse: Yes
  Gconf:
   
  IfupdownConfig:
   auto lo
   iface lo inet loopback
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110803.1)
  IpRoute:
   default via 192.168.100.1 dev eth0  proto static 
   192.168.100.0/24 dev eth0  proto kernel  scope link  src 192.168.100.41
  Keyfiles: Error: [Errno 2] No such file or directory
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  ProcEnviron:
   LANGUAGE=en_GB:en
   PATH=(custom, user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: network-manager
  UpgradeStatus: No upgrade log present (probably fresh install)

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