I'm having this weird bug on Stretch with gdm3 and Gnome. Fluxbox and i3 work perfectly. It's difficult to describe it so I uploaded a couple videos to show you:
I googled it but I haven't found anything like it.
It started not immediately after upgrading to stretch, but in some upgrade after that. I tried reverting the last updates but that didn't solve the problem.
Maybe some configuration changed? Maybe a hardware issue? But that only manifests itself with gnome (weird)?
And things have been running so smoothly for years that I've gotten a little rusty in fixing things... I don't know where to begin.
I want to file a but report but I don't know if this bug belongs to gnome, to xorg, to the radeon driver...
I'm using current Stretch versions of all packages.
1:00.0 VGA compatible controller : Advanced Micro Devices, Inc. [AMD/ATI] Turks XT [Radeon HD 6670/7670] [1002:6758]
I appreciate any help/suggestions you might have.