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On a Latitude E6530, I get a flickering screen issue only after both upgrading to windows 10 and while using a monitor. The problem doesn't appear otherwise.
Both monitors seem to be set to 60 Hz.
I tried updating my Nvidia driver, didn't work.
This occurs with more than one monitor.
Given that this occurs with the upgrade to windows 10 I'm forced to think its a driver issue, but if updating the drivers doesn't fix it I don't know what else to try.
It appears to me that the flicker only occurs on the laptop's screen and not the secondary monitor.
Edit: By switching off optimus and rebooting, installing the latest intel graphics drivers, I get no flicker. I don't like Optimus being enabled though, so I'd like a solution that doesn't involve using the intel card at all...