[karmic] Intel WiFi Link 5300 sometimes not working on 5 GHz
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Wireless Tools |
New
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Won't Fix
|
Undecided
|
Unassigned |
Bug Description
I'm using karmic (with latest updates) and I experienced my Intel Wifi Link 5300 sometimes fails to operate after system startup. dmesg gives repeatedly "iwlagn 0000:03:00.0: ERROR: No TX rate available." (see attachment). A dhcp lease is aquired, but no further data transmission is possible. Reboot sometimes helps, but often several reboots are required until I can get this to work. Unloading and reloading the iwlagn modules does NOT help.
If it works after a startup, it does so at excellent speed and stability for hours even at high thoughput rates.
This behavior is unchanged from 2.6.31-5-generic up to 2.6.31-8-generic (versions before I did not try).
This bug only appears when using the 5GHz band, 2.4GHz is unaffected.
Since ubuntu-bug does not open a window after colecting and sending data I have to report this one this way.
Googling about that gives only one serious hit, but there it is some incombatibility with the closed-source fglrx-driver, wich in my case is not in use (not even installed).
Additional Information:
System: Lenovo ThinkPad T500 with Intel WiFi Link 5300 (a/g/n) using Kubuntu Karmic amd64
WLAN-AP: Linksys WRT610N using latest stock firmware
WLAN-Config: WPA2 (AES), N-Standard only in 5GHz band, wide channels (40MHz), automatic frequency selection activated
Please see attached dmesg-logs.
affects: | ubuntu → linux (Ubuntu) |
tags: | added: wifi |
tags: | added: 5300 iwlagn kernel-bug |
Still existent.
I did some testing: If you leave the computer alone after startup for 1 or 2 minutes it often works, but almost never if you try to transfer data immediately after aquiring a ip address.
I have another notebook with an Intel 3945abg wireless card wich does not have this issue (using the same network).