Daniel, sorry, I did not complete my post after #18 and apt policy result - we were discussing with didrocks and frenchy82 on the French forum with the details, I tried to resume here all steps in order other people and developers involved in bug also got the informations.
http://forum.ubuntu-fr.org/viewtopic.php?pid=21810017#p21810017 So I did (always in chroot mode) : sudo dpkg -i libegl1-mesa_17.2.1-0ubuntu1_amd64.deb libgbm1_17.2.1-0ubuntu1_amd64.deb libgl1-mesa-dri_17.2.1-0ubuntu1_amd64.deb libgl1-mesa-glx_17.2.1-0ubuntu1_amd64.deb libglapi-mesa_17.2.1-0ubuntu1_amd64.deb libgles2-mesa_17.2.1-0ubuntu1_amd64.deb libwayland-egl1-mesa_17.2.1-0ubuntu1_amd64.deb libxatracker2_17.2.1-0ubuntu1_amd64.deb mesa-va-drivers_17.2.1-0ubuntu1_amd64.deb mesa-vdpau-drivers_17.2.1-0ubuntu1_amd64.deb It downgraded the 10 packages installed in 17.2.1 version. But when I rebooted normally, it was still frozen at Ubuntu screen and message 'Started User Manager for UID 121' My graphic card : Gallium 0.4 on AMD CAPE VERDE (DRM 2.49.0 / 4.10.0-19-generic, LLVM 4.0.0) After dpwngrading mesa, I tried downgrading mutter, xserver-xorg-video- ati, xorg-server, then booting on the grub to older kernels : nothing worked, I still have the bug on startup. You're right, I don't know if I missed something on the instructions to come back on previous versions with the risk to eliminate the good direction to search, or if bug comes from something else... I was afraid of that, but frenchy82 test seems to confirm downgrading mesa is not enough to solve the problem. I can continue to do some testings if you need. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1723577 Title: Artful won't start with Wayland activated (AMD?) Status in gdm3 package in Ubuntu: Confirmed Status in mesa package in Ubuntu: Incomplete Bug description: On a fresch install, ubuntu stop and freeze before gdm is opened With no splah i have "started user manager for uid 121" and then it freeze need to uncomment WaylandEnable=false in custom.conf to start ubuntu so with xorg. lspci -nn | grep VGA return 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Barts PRO [Radeon HD 6850] [1002:6739] ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-shell 3.26.1-0ubuntu2 ProcVersionSignature: Ubuntu 4.13.0-15.16-generic 4.13.4 Uname: Linux 4.13.0-15-generic x86_64 ApportVersion: 2.20.7-0ubuntu3 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sat Oct 14 07:36:30 2017 DisplayManager: gdm3 GsettingsChanges: b'org.gnome.shell' b'favorite-apps' b"['firefox.desktop', 'thunderbird.desktop', 'rhythmbox.desktop', 'org.gnome.Nautilus.desktop', 'org.gnome.Software.desktop', 'org.gnome.Terminal.desktop', 'libreoffice-calc.desktop', 'libreoffice-writer.desktop', 'simple-scan.desktop']" b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'" InstallationDate: Installed on 2017-10-13 (0 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Beta amd64 (20171012) 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1723577/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp