Weird graphical glitches bug with gdm3 and gnome on stretch

From	Ramiro Simões Lopes <ramirosimoeslopes@gmail.com>
Newsgroups	linux.debian.user
Subject	Weird graphical glitches bug with gdm3 and gnome on stretch
Date	2017-09-09 20:50 +0200
Message-ID	<unSZk-R2-11@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hi everyone!

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:

https://photos.app.goo.gl/lgTsHKLZhBa3SaF83
https://photos.app.goo.gl/m2Dj4XYP79q0fSTJ2

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.

Hardware:
1:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Turks XT [Radeon HD 6670/7670] [1002:6758]

Driver:
xserver-xorg-video-radeon 1:7.8.0-1+b1
firmware-amd-graphics 20161130-3

Kernel:
linux-image-4.9.0-3-amd64 4.9.30-2+deb9u3


I appreciate any help/suggestions you might have.

Thank you,
Ramiro

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Weird graphical glitches bug with gdm3 and gnome on stretch Ramiro Simões Lopes <ramirosimoeslopes@gmail.com> - 2017-09-09 20:50 +0200
  Re: Weird graphical glitches bug with gdm3 and gnome on stretch Alessandro Vesely <vesely@tana.it> - 2017-09-11 09:40 +0200

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