[Venton Unibox HDx] Wlan makes the box sluggish

[d2mac]

If the USB WLan (ath9k) is active the VentonHD3 box is very sluggish. Opening the movie directories, EPGs etc. will take 8-10s and VIX-logo runs quite often. The actual WLan connection speed has no problems. (The same issue was with OpenVix3.0.)

After activating the Lan-connection the box function speeds up to normal.
Wondering is ath9h-drivers/interface would need some optimization...