Pretty odd problem has bothered me for a long time.
I have a TP-LINK TL-WN725N v1 usb wifi dongle. the chip is RTL8188CUS, according to wikidevi.com
It was working out of box when i used it in my raspberry Pi B2 (wheezy/jessie), but When I use it now in an old pc running OpenMediaVault (2.2.5), It cannot detect my wifi, the VERY SAME ROUTER I used for a long long long time (TP-LINK 841N 300M).
any thoughts?
P.S. this site's Verification system is kinda harsh on my life, since Google is banned in China. 
Thanks!