Ernest, thanks for your testing. Two more questions:
(1) When you log into "Ubuntu on Xorg", can you please run this and send us the output?
xrandr
Then verify again that totem doesn't work in that session.
(2) Does the situation improve after you do this?;
sudo apt remove mesa-va-drivers
Ernest, thanks for your testing. Two more questions:
(1) When you log into "Ubuntu on Xorg", can you please run this and send us the output?
xrandr
Then verify again that totem doesn't work in that session.
(2) Does the situation improve after you do this?;
sudo apt remove mesa-va-drivers