I have the same problem, but it started after the official release. My monitor, which is an external LG monitor, flickered. Then I turned the refresh rate down and it was better for a week. After last night's security update it happens at any rate. I've had this monitor for years with no problems.

I have the same problem, but it started after the official release. My monitor, which is an external LG monitor, flickered. Then I turned the refresh rate down and it was better for a week. And now it happens at any rate. I've had this monitor for years with no problems.