[amdgpu][radeon][regression] Full screen white flash from time to time (Wayland and X11)

Bug #1765141 reported by Hadrien on 2018-04-18
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
gnome-shell (Ubuntu)
Undecided
Unassigned
mesa (Ubuntu)
Undecided
Unassigned
mutter (Ubuntu)
Undecided
Unassigned

Bug Description

I am using Ubuntu 18.04 with gnome shell on Wayland.

From time to time, maybe every one or two hours, the desktop becomes white for a fraction of second. I guess it is just one frame (1/60 of second). It looks like a full filled rectangle of white color but it is so fast I cannot verify to be sure (the only solution I'm thinking of would be to have a fast recording camera pointed to my display).

I did not experience that problem on Ubuntu 17.10 with Wayland.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-shell 3.28.0-0ubuntu5
ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15
Uname: Linux 4.15.0-15-generic x86_64
ApportVersion: 2.20.9-0ubuntu5
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Apr 18 19:26:15 2018
DisplayManager: gdm3
InstallationDate: Installed on 2018-04-07 (11 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180403)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)

Hadrien (psydk) wrote :
summary: - Full screen white flash from time to time
+ Full screen white flash from time to time with Wayland
summary: - Full screen white flash from time to time with Wayland
+ [regression] Full screen white flash from time to time with Wayland
tags: added: visual-quality

I used X11 more often lately and faced the same bug, so it is not actually a Wayland only problem.

It seems the flash occurs only in the evening. So my guess is that the bug is related to the Night Mode of Gnome that randomly deactivates itself for one frame.

summary: - [regression] Full screen white flash from time to time with Wayland
+ [regression] Full screen white flash from time to time (Wayland and X11)
Daniel van Vugt (vanvugt) wrote :

From what I've seen of the gnome-shell/mutter/clutter/cogl source code, they use white as a default colour. So if you see something that's all white it means there's meant to be a texture or image there, but for some reason it failed to render.

That might sound obvious and meaningless but it's not :)

Can you please attach output from this command?

  lspci -k

because I think this issue will be driver-specific.

Changed in gnome-shell (Ubuntu):
status: New → Incomplete
Changed in mutter (Ubuntu):
status: New → Incomplete
Hadrien (psydk) wrote :

Mesa version is the one that comes with Ubuntu 18.04: Mesa 18.0.0-rc5

tags: added: amggpu radeon
tags: added: amdgpu
removed: amggpu
summary: - [regression] Full screen white flash from time to time (Wayland and X11)
+ [amdgpu][radeon][regression] Full screen white flash from time to time
+ (Wayland and X11)
Changed in gnome-shell (Ubuntu):
status: Incomplete → New
Changed in mutter (Ubuntu):
status: Incomplete → New
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