My desktop works well at most time, but some times it flash.

I have tried to send this email to x...@freedesktop.org and x...@lists.freedesktop.org but it seems that the I send this mail to the wrong address. I'm sorry if you received this mail repeatedly Hi, I'm using Lenovo Ideapad Y460 laptop. My computer performs well at most time. But sometimes my s

My desktop works well at most time, but some times it flash.

Hi, I'm using Lenovo Ideapad Y460 laptop. My computer performs well at most time. But sometimes my screen flashs about every 1 seconds. Each flash will interrupt pull down menu and ibus IME input window. The xev tool shows that each flash comes with the following events: Expose event, serial 34,