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What if my screensharing is flicking or black?

There may be several reasons for this:

  1. Problems with your connection
  2. Connection issues on the side of the person who shared the screen
  3. You need to change the Hardware Acceleration option in your browser

We cannot influence the first two in any way. Just recommend turning off VPN and sit closer to the router (or better use a patch cord). But here's an instruction on how to deal with point 3.

How to Turn Hardware Acceleration On or Off

Fire up Chrome, click the menu icon, and then click on “Settings.” Alternatively, you can type chrome://settings/ into the Omnibox to go directly there.

Click the menu button, then click Settings

In the Settings tab, scroll down to the bottom and then click “Advanced.”

Under Settings, click advanced, located at the bottom of the page

Scroll down to the System section and find the “Use hardware acceleration when available” setting. Toggle the switch and then click “Relaunch” to apply the changes.

Warning: Make sure you save anything you’re working on. Chrome reopens the tabs that were opened before the relaunch but doesn’t save any of the data contained in them.

Toggle Use hardware acceleration when available to the Off position, then click Relaunch to apply the change

If you’d rather wait to restart Chrome and finish up anything you’re working on, just close the tab. Chrome will apply the change the next time you close and reopen it.