On Thu, 2021-01-28 at 07:49 -0800, Jonathan Ryshpan wrote:

I've been seeing strange things on my panel for about a week or two. They are triangles or lines extending horizontally from a region of some color, narrowing to a point. They last generally for up to about 30 seconds. Attached is a picture of such an artifact (PanelArtifact.jpg), taken with my cell phone. Note the black stripe just above "System Information". Has anyone seen anything like this

System: Fedora-32 all updates installed
Processor: 4 x Intel i5 4460 CPU at 3.2 GHz
Memory: 15.5 GiB RAM
Video System: Xorg (not Wayland)
Graphics: Mesa DRI Intel HD Graphics 4600
KDE Plasma: 5.20.5
KDE Framework: 5.78.0

Could it be a hardware issue? It has an intermittent quality that looks like hardware trouble; but then why would the artifacts happen only in the panel?