I'm a new user of Deepin OS and I'm loving it so far. But, after i updated the system from 15.3 to 15.4, my back-lit keyboard isn't working properly. I mean, it lights up the led when it's starting up, but when i get to my desktop and try to type it doesn't lit up. Can someone help me to figure out whats wrong?
I use a Sony Vaio laptop and it doesn't have a fn+key to do it manually.
中文 
I use a Sony Vaio laptop and it doesn't have a fn+key to do it manually.