[Q] Wifi Link Speed stuck at 24mps topic

It doesn't matter which network I try, 2.4 or 5, how far I am from router, how strong the signal is. Link speed is permanently stuck at 24mbps. I have no idea if this problem started after flashing Lollipop (I'm on CM12 nightly) or not, but I tried going back to JB and still the same. Nexus 7 on Lollipop (CleanRom 5.0) gets much faster link speed from same location.

TIA/