Making youtube fullscreen will freeze Unity (the whole desktop)

It seems like the problem reappeared with Chrome version 49. Below is a workaround that will solve the problem until Chrome fixes this bug. It works without disabling hardware acceleration in Chrome (and potentially causing other issues).

1. If compizconfig-settings-manager is not installed, install it by

   sudo apt-get install compizconfig-settings-manager

2. Launch compizconfig-settings-manager by typing ccsm from the terminal

3. Double click to open the Composite plugin

4. Add & !(class=google-chrome) at the end of the Unredirect Match text box (see screenshot below).

   

5. Close the settings manager.

6. Be scared no more to click on Full Screen!

Source: https://bugs.chromium.org/p/chromium/issues/detail?id=550091#c43

I tried upgrading to

40.0.2214.93

It does not help much. after a while the problem start again, as it is mentioned by other users above.

The one worked for me is this - disable the hardware acceleration settings. in google chrome. For disabling hardware acceleration - go to the option "customize and control google chrome" the gray area in upper right corner besides the option of Google input tools-

Then click on settings from the drop down menu. click on the blue option

Show advanced settings...

check for the 16th category -

System

and see if the box for using hardware acceleration is checked

if it is checked please uncheck it.

This has solved my problem.

Got the same issue ever after the Chrome 40.0.2214.91 release, and though I haven't tried the .93, I can at least confirm the issue is 100% gone in Chrome 41 Beta.

Strongly considering sticking to the beta until 41 becomes stable, or at least until it's 100% confirmed a point release fixed the issue.