Graphics Flush is useful when a previously executed command modified the graphics and didn't update the screen and the user wishes to update the display.
The Graphics Clear command clears the graphics window without redrawing the scene, leaving the window blank.
Tonight in Redmond Microsoft is pushing out the very first update to the Display Dock used for Continuum on phones.
The update takes the firmware of the Display Dock from version 3.0 to version 4.0, and there is no changelog posted yet (but there is a link to a 'What's new' that is not yet refreshed).
On the phone, navigate to the Gadgets app and choose the HD-500 listed on the menu.
Once the app is open choose the ellipsis ('…') at the bottom of the display and pick Check for updates The phone will then take over and download the new firmware and install it to the HD-500 Display Dock.
If you have build 1151 or later, the option to do that is no longer present so you only have a choice between automatic updating or no updating.
While we can't stop the update process from happening for the majority of updates, what we can do is stop it from updating drivers to versions that deviate from those that are working, stable and preferred by YOU to be there. Start by right clicking the start menu button and selecting Control panel, or navigate to control panel however you normally would do so.
You can get to the Control Panel quickly, by calling up the run box with the Win R shortcut and then typing "control" and hitting Enter. Once the System properties window opens, click on "Advanced system settings" on the left side of the window. Windows 10 should no longer "automatically" update your driver settings.
The update is likely tied to today's Gadget app update and build 10586.29 of Windows 10 that went out earlier this week.
We also wouldn't be shocked to hear about some improvements with Miracast support, which like Bluetooth, can be very finicky.