First of all, I want to thank
thelonelycoder wholeheartedly for the Ab-solution.
I have just upgraded my AC68U from 380.59 to 380.62_1 with factory reset. After that, I install Entware-NG and this fresh version of AB-solution. Both are working. I then install Pyload and Transmission. Things become weird. Before I can install Transmission, I have to turn off Ab-solution. Otherwise, when I install Transmission, I got "cannot allocate memory" error.
After the installation of Transmission, I can't use it because it seems being killed instantly on router bootup or my manual startup command. After several reboots, I got it work but then I lost Pyload. I tried to restart Pyload manually but I got something like MemoryError. I tried to call out the control panel of Pyload and then I got Segmentation fault. During these 2-3 days, I have my router numerously rebooted. I found that AB-solution, Pyload and Transmission hardly work at the same time.
For the memory issue, I observed that the RAM usage have never exceeded 160MB
About an hour ago, I tried to uninstall AB-solution to check if it is the clue. But Entware didn't work anymore. I'm really out of ideas. Any help is appreciated. Thanks
Update:
I finally get Entware to work. Now, Pyload and Transmission also work. I could safely assume the above issue comes from AB-solution.