06-19-2011 12:44 PM
the subject says it all.
brand new t520 with optimus (nvidia+intel) display adapter, 1920x1080 screen.
whenever i plus in or unplug power, the display blanks for about 2 seconds, then flashes back on.
the problem occurs whether the bios setting is integrated, dicrete, or optimus, and th problem occurs even if the display settings are the same in power profile for AC and battery.
is this normal? it is very BAD.
thanks in advance.
Solved! Go to Solution.
06-21-2011 08:31 PM
06-21-2011 09:41 PM
06-22-2011 12:58 AM
06-23-2011 08:03 PM
yes, it is the 50/60 hz problem.
i made it go away by setting both ac and battery operation to 50hz. this is not optimal for external displays, but it is fine (for me) on the laptop display.
08-25-2018 08:45 AM
I too had this problem with my lenovo L560, I changed intel display setting and it worked for me.
Go to desktop -->right click--graphics properties---power setting/intel monitor setting---disable the "Display refresh rate switching"