[Bug 183796] Re: iwl4965 unusable: packet loss, slow network

[aus]

*** This bug is a duplicate of bug 621265 ***
    https://bugs.launchpad.net/bugs/621265

** This bug is no longer a duplicate of bug 340418
   iwl3945 slow down after some time to 100kbps, unload/load module return speed to 1.5mbps
** This bug has been marked a duplicate of bug 621265
   Slow Wireless Connection in Intel 3945abg
 * You can subscribe to bug 621265 by following this link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/621265/+subscribe

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https://bugs.launchpad.net/bugs/183796

Title:
  iwl4965 unusable: packet loss, slow network

Status in The Linux Kernel:
  Invalid
Status in “linux” package in Ubuntu:
  Triaged
Status in PLD Linux Distribution:
  Confirmed

Bug description:
  Binary package hint: linux-image-2.6.24-4-generic

  On my sony vaio TZ, the intel wireless adapter is correctly detected but performances are horrible when using a 802.11b access point.
  This *does'nt seem* to affect 802.11g access points but I only tested with one. (While I tested 2 b access points, both perfectly working
  with other laptops (Linux/Windows Vista, intel cards,...)).
  I am testing with hardy amd64:

  # uname -a
  Linux carciofo 2.6.24-4-generic #1 SMP Mon Jan 14 18:19:11 UTC 2008 x86_64 GNU/Linux

  Behaviour is the following:
  modprobe iwl4965 works properly.
  network-manager associate with the acess point (WEP authentication),
  route/dns is setup correctly.

  ping 192.168.0.1 (the acess point) show over 10% packet loss and half the packet duplicated (DUP!),
  with the laptop only a few meters from the AP.
  Downloading a file with wget shows poor performances (around 10kb/s max) while connecting the laptop to the AP with ethernet gives around
  1Mb/s in download speed.

  This is with linux-image-2.6.24-4 from Hardy but the following
  kernel/driver combinations give the same behaviour:

  - linux-image-2.6.22 from gutsy
  - stock 2.6.23.13 kernel with latest mac80211 (10.0.0.4), latest iwlwifi (1.2.23) and latest firmware.
  - stock 2.6.24-rc7 and -rc8 with in-tree mac80211 and iwlwifi (1.2.23 fails to compile due to a change of wext_handle_ioctl and such).

  - also tried associating manually with iwconfig instead of network-manager, same result. 
  - also tried without wep.
  - also tried with various module parameters (antenna=1,2, disable_hw_scan=1, ...)

  I will attach output of iwconfig, lspci -v, dmesg, and ping.
  Let me know if I can do some more testing.