I use wicd as an alternative to Network Manager. This is only possible in
some distros unfortunately as Network Manager is so integrated in some
cases that it can't be removed without ripping out the entire desktop.
Rob (happy Debian & wicd user)
On Wed, 19 Aug 2015, William Park wrote:
My wireless connection crawls for 20sec every 2min. NetworkManager was
scanning my wireless network every 2min (iwevent says so). The problem
is that the scan lasts 20sec, and during that 20sec, I get the following
dmesg messages:
ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
and my connection crawls. The card is Linksys WMP600N (rt2800pci).
I tried different kernels, different driver settings, different
NetworkManager configurations, etc. Since it's the only wireless card I
have, I couldn't try different card and didn't feel like buying another.
Finally, an accidental click led me to a solution:
To prevent NetworkManager from scanning, set BSSID to the MAC
address of access point.
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