Public bug reported:
I have a Thinkpad T61p with an Intel 4965 AGN card (I'm on Gutsy). Everything
worked until a week or two
ago or so, but since then I experience dropping wireless connections. Problem
is, I also changed access
points around that time. However, other operating systems on the same laptop
(OpenBSD -current,
Windows XP, Windows Vista) do not experience dropouts, not even on the new
access point. The connection
drops even when it's actively in use, so it doesn't seem te be caused by an
inactivity timeout.
The access point is a PCI card with a Ralink 2561 chipset in hostap mode, in a
server running
OpenBSD 4.1-STABLE. The connection is 802.11g, without WEP or WPA. (I use IPsec
to secure the
traffic going over the wireless connection.)
When the connection drops, the following shows up in the dmesg:
[ 2793.384000] wlan0: No ProbeResp from current AP 00:11:6b:3d:7f:6a - assume
out of range
[ 2825.384000] wlan0: No STA entry for own AP 00:11:6b:3d:7f:6a
[ 2857.384000] wlan0: No STA entry for own AP 00:11:6b:3d:7f:6a
[ 2889.384000] wlan0: No STA entry for own AP 00:11:6b:3d:7f:6a
[ 2921.384000] wlan0: No STA entry for own AP 00:11:6b:3d:7f:6a
(and the last line repeated many times)
This is the output of "iwconfig wlan0" when the connection works:
wlan0 IEEE 802.11g ESSID:"stupendous"
Mode:Managed Frequency:2.412 GHz Access Point: 00:11:6B:3D:7F:6A
Bit Rate=54 Mb/s
Retry min limit:7 RTS thr:off Fragment thr=2346 B
Link Quality=85/100 Signal level=-42 dBm Noise level=-90 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
I have to do the following to get connectivity again:
ifconfig wlan0 down
rmmod iwlwifi_mac80211
rmmod iwl4965
modprobe iwl4965
iwconfig wlan0 essid stupendous
(wait a bit, because it won't get associated)
iwconfig wlan0 ap off
iwconfig wlan0 ap any
(hey, now it does associate!)
ifconfig wlan0 192.168.2.14 netmask 255.255.255.0 up
After this, it immediately works again.
I didn't find another way to get the connection working after it drops
(short of rebooting).
** Affects: linux-ubuntu-modules-2.6.22 (Ubuntu)
Importance: Undecided
Status: New
--
iwl4965 connection drops every 10-15 minutes
https://bugs.launchpad.net/bugs/148227
You received this bug notification because you are a member of Ubuntu
Bugs, which is the bug contact for Ubuntu.
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
