In my situation, iwevent does not indicate disconnects/reconnects, but I get
this same huge volume of messages in dmesg.
[449203.816051] ===>rt_ioctl_giwscan. 9(9) BSS returned, data->length = 1338
[449323.820103] ===>rt_ioctl_giwscan. 15(15) BSS returned, data->length = 2484
[449443.814379] ===>rt_ioctl_giwscan. 15(15) BSS returned, data->length = 2316
[449563.818063] ===>rt_ioctl_giwscan. 12(12) BSS returned, data->length = 1724
[449683.814254] ===>rt_ioctl_giwscan. 17(17) BSS returned, data->length = 2459
[449803.809710] ===>rt_ioctl_giwscan. 17(17) BSS returned, data->length = 2811
[449923.814747] ===>rt_ioctl_giwscan. 19(19) BSS returned, data->length = 3006
Every 20 seconds exactly (I timed it), the laptop's network connection
"pauses" for just a moment, then resumes. This especially affects
applications that don't do enough buffering. In my case, I noticed the
problem because pulseaudio does not do sufficient buffering to
compensate for this pause every 20 seconds, and I get skipping.
Another laptop with an Intel wireless card does not show this 20 second
problem, and I tested with both in the same location. Notably, the
router is just about 6 feet away from the laptop.
Here's the iwconfig output:
$ iwconfig ra0
ra0 RT2860 Wireless ESSID:"apt" Nickname:"RT2860STA"
Mode:Managed Frequency=2.417 GHz Access Point: 00:1D:60:54:24:D0
Bit Rate=54 Mb/s
RTS thr:off Fragment thr:off
Link Quality=100/100 Signal level:-41 dBm Noise level:-71 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
You can't get better than 100/100 link quality, and these problem still
occur.
$ uname -a
Linux nantucket 2.6.31-19-generic #56-Ubuntu SMP Thu Jan 28 02:39:34 UTC 2010
x86_64 GNU/Linux
Further info available upon request.
--
rt_ioctl_giwscan log spam removal or fix
https://bugs.launchpad.net/bugs/356807
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