Fuck linux, makes things even harder.
use this method maybe make your situation better, maybe not.echo "option ath9k nohwcrypt=1" | sudo tee /etc/modprobe.d/ath9k.confAfter use this, I success to keep the network connected all the time, but the ping shows there's still 50% packet loss.Fuck linux again, video card at first, now this!Fuck!
Finally, I fix this network problem by reinstall the 64-bit version instead of 32.