Hostapd/ WIFI Timouts "rt2800usb_entry_txstatus_timeout"

During the last days, i had been disconnected from my hostapd based AP. Digging into it i found suspicious entries in the syslog.

tail -n 400 /var/log/syslog

similar like this:

Sep 27 14:55:33 Raspi kernel: [ 4916.133773] ieee80211 phy0: rt2800usb_entry_txstatus_timeout: Warning - TX status timeout for entry 14 in queue 2
Sep 27 14:55:33 Raspi kernel: [ 4916.432124] ieee80211 phy0: rt2800usb_txdone: Warning - Got TX status for an empty queue 2, dropping
Sep 27 14:55:37 Raspi kernel: [ 4920.459732] ieee80211 phy0: rt2800usb_txdone: Warning - Got TX status for an empty queue 2, dropping

The log file was full of them. Searching in Google, most hints focused the power management of USB WIFI adapters. I tried differed approaches, but in the end the successful hint was an additionally entry in the network configuration. Open this file:

nano /etc/network/interfaces

and add this line:

wireless-power off

Mostly this command was then recommended but in my case, with Raspbian Wheezy, it was not successful:

iwconfig wlan0 power off

The following command made me smile again:

/usr/sbin/ifplugd wlan0 --kill

Since this, timeouts on hostapd are history and the AP is running stable.