I have a Toshiba a505-s6986 laptop with a realtek 8191se wireless chip. The wireless works flawlessly on AC but will drop the connection several times before failing all together when running on battery. It “seems” that the lower the battery level the worse the problem becomes. However, it starts failing well above 50%.
I am dual boot with Win7 and if I reboot into windows the wireless works fine right up to the point the battery goes critical and shuts down the pc.
So, I assume it is an issue with the realtek linux driver. Is there some kind of power management that is not setup correctly? It is irritating when trying to use the laptop on battery power.
Just looking through old posts. Since I posted this there have been 2 updates to the realtek driver. 8192se I think it is ( not at my laptop ). Anyway, the problem has been fixed and now works well when on battery.