I have this problem on my laptop HP Elitebook 820 g1. It's actual only for Ubuntu and not for Windows. It shows unpredictably and sometime pass away by itself. Now I cure it with screen blocking, and after reauthorization artefacts vanishes for a few minutes.
There is Intel i5-4200u inside. And it has built-in Intel HD4400 graphics.
I have this problem on my laptop HP Elitebook 820 g1. It's actual only for Ubuntu and not for Windows. It shows unpredictably and sometime pass away by itself. Now I cure it with screen blocking, and after reauthorization artefacts vanishes for a few minutes.
There is Intel i5-4200u inside. And it has built-in Intel HD4400 graphics.
Here is hwinfo:
And glxinfo:
Is there any means to deal with this problem?