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

[evgheni]

*** This bug is a duplicate of bug 340418 ***
    https://bugs.launchpad.net/bugs/340418

** This bug has been marked a duplicate of bug 340418
   iwl3945 slow down after some time to 100kbps, unload/load module return speed to 1.5mbps

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iwl4965 unusable: packet loss, slow network
https://bugs.launchpad.net/bugs/183796
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Linux.

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.