OK, next please run these commands and send us the resulting files:
dmesg > dmesg.txt
journalctl > journal.txt
And in case something is crashing please also do:
1. Apply the workaround from bug 994921.
2. Look in /var/crash for crash files and if found run:
ubuntu-bug YOURFILE.crash
and tell us the ID of the newly-created bug.
3. If step 2 failed then look at https://errors.ubuntu.com/user/ID where
ID is the contents of the /var/lib/whoopsie/whoopsie-id file on the
machine. Do you find any links to recent problems on the machine? If so
then please send them to us.
** Changed in: gdm3 (Ubuntu)
Status: Confirmed => Incomplete
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1782347
Title:
[radeon] GDM3 fails to load without nomodeset
Status in gdm3 package in Ubuntu:
Incomplete
Status in linux package in Ubuntu:
Incomplete
Bug description:
Both with the livecd (usb drive) and the installed version, I must boot with
the 'nomodeset' kernel parameter at GRUB; otherwise GDM3 will not boot (the
screen will keep on flashing in semi-textual mode, with a white mouse arrow
stuck).
This, however, prevents me from using the 'radeon' video driver, dropping me
to a very basic 1024x768 vesa mode.
The bug did NOT occur on Ubuntu 12.04, so it is a regression.
Also, the bug does NOT occur on XUbuntu/XFCE 18.04, so it is a GDM3-Gnome
related thing.
Thanks,
MZ
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gdm3 3.28.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CasperVersion: 1.394
CurrentDesktop: ubuntu:GNOME
Date: Wed Jul 18 12:18:06 2018
LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C.UTF-8
SHELL=/bin/bash
SourcePackage: gdm3
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.gdm3.custom.conf: 2018-07-18T12:14:53.871895
---
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CasperVersion: 1.394
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.04
LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
Package: linux
PackageArchitecture: amd64
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Tags: bionic
Uname: Linux 4.15.0-20-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: 2018-07-19T11:39:06.027905
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