As the title says, if I close my laptop lid while Chromium is running and then open it again, Chromium is quite sluggish (slow) when my laptop wakes from sleep. The mouse lags and scrolling is choppy. Other programs seem to not suffer this problem. Restarting Chromium returns it to normal. Machine is Lenovo 81SS, AMD Ryzen5 3500U.
This did not happen with Ubuntu 19.10
Thank You
11 Answer
Same problem for me (ubuntu 20.04 + Chrome 85.0.4183.102). I solved it by simple disabling the Use hardware acceleration when available in Chrome Settings. There you go for a pretty long explanation of the reasons.
