[Bug 1775881] Re: [radeon] Wayland sessions including the login screen are just static noise on AMD Caicos

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https://bugs.launchpad.net/bugs/1775881

Title:
[radeon] Wayland sessions including the login screen are just static
noise on AMD Caicos

Status in gdm3 package in Ubuntu:
Confirmed
Status in linux package in Ubuntu:
Confirmed
Status in mutter package in Ubuntu:
Confirmed

Bug description:
Ubuntu Version 18.04 LTS

gdm3:
Installed: 3.28.0-0ubuntu1 500

Package name: /etc/gdm3

Whenever I boot Ubuntu following installation from the official
install ISO, the boot screen appears, but the login manager appears as
static, scrambled graphics, making me unable to login without opening
the VT and installing lightdm and switching to that login manager.

Expected Results:
Login manager appears with login field, background, and menu while I am able to find, click, and enter information into the login text fields.

Actual Results:
Scrambled noise appeared on my screen and I am unable to leave without force-shutting down my Gateway PC, or opening a VT and installing lightdm, rebooting afterwards.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gdm3 3.28.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
Uname: Linux 4.15.0-22-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Fri Jun 8 11:41:23 2018
InstallationDate: Installed on 2018-06-07 (1 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
ProcEnviron:
TERM=linux
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: gdm3
UpgradeStatus: No upgrade log present (probably fresh install)
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.04
Package: mutter
PackageArchitecture: amd64
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 4.15.0-70.79-generic 4.15.18
Tags: bionic
Uname: Linux 4.15.0-70-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
mtime.conffile..etc.gdm3.custom.conf: 2019-11-29T12:32:53.022462
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
DistroRelease: Ubuntu 18.04
Package: mutter
PackageArchitecture: amd64
ProcEnviron:
TERM=linux
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 4.15.0-70.79-generic 4.15.18
Tags: bionic
Uname: Linux 4.15.0-70-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
mtime.conffile..etc.gdm3.custom.conf: 2019-11-29T13:14:23.686888
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
DistroRelease: Ubuntu 18.04
Package: mutter
PackageArchitecture: amd64
ProcEnviron:
TERM=linux
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 5.0.0-37.40~18.04.1-generic 5.0.21
Tags: bionic
Uname: Linux 5.0.0-37-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
mtime.conffile..etc.gdm3.custom.conf: 2019-12-08T13:34:15.689391
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
DistroRelease: Ubuntu 18.04
Package: mutter
PackageArchitecture: amd64
ProcEnviron:
TERM=linux
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 5.0.0-37.40~18.04.1-generic 5.0.21
Tags: bionic
Uname: Linux 5.0.0-37-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
mtime.conffile..etc.gdm3.custom.conf: 2019-12-08T13:42:01.988517

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