some display area is blurred on qt creator 6.0.2(Qt.5.15.2) on ubuntu 20.04.4

[JoeCFD]

The area of compiling output is blurred when my project is being compiled. It looks like it is not updated quickly enough. When a file name is clicked, some blurred area pops up as well. What could be the problem?

[JoeCFD]

it is driver's problem. Other apps have the same issue. I need to upgrade the drivers. but MS code does not have this issue. This is a DELL laptop.

[JoeCFD]

It is Intel VA_API issue
https://github.com/intel/libva/issues/396

[JoeCFD]

It is only a problem of intel graphic card.