How do I diagnose this flickering line I have? It is located at the very top, like the first pixel of the monitor, over to the right. It’s above the Gnome title bar. It’s 1 pixel high, and about 50% of the screen wide. I was thinking it was possibly some system activity monitor, but the more I think about it, the more I think not – it’s not very useful.

I tried recording the screen, but it’s not in the recording so is it the graphics card driver (Radeon Cedar)?

The line flashes based on activity; if I move the mouse, it flickers quickly, if I type on the keyboard, it flickers roughly every 2-3 key strokes. If I do nothing and observe, it slowly flashes just about every 2 seconds, or sometimes not at all until I move the mouse or keyboard again.

If I reboot or logout, it goes away and then just spontaneously shows up again at some point after logging back in. Sometimes soon (minutes), sometimes not for hours
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I’ve attached my logs, any help is appreciated! Thanks!

  • arf

EDIT: ok, I can’t figure out how to attach the logs …

[0_1486142663680_logs-2017-03-02_11-56-14.tar.gz](Uploading 100%)