[radeon duo] GDM shows but blank screen appears when trying to log in to GNOME

[Борис Михаилов]

GDM shows and when trying to log in to gnome session blank screen appears. Going to tty7 returns to login screen. It switches to some of the first tty (1 to 3) because when trying to switch on them, they are all blank.

Graphics info attached to duplicate bug 1680832

GraphicsCard:
 Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Broadwell-U Integrated Graphics [17aa:3902]
   Subsystem: Lenovo Sun XT [Radeon HD 8670A/8670M/8690M / R5 M330] [17aa:381b]
InstallationDate: Installed on 2016-05-18 (323 days ago)
InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
MachineType: LENOVO 80J2

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: gdm3 3.18.3-0ubuntu2
ProcVersionSignature: Ubuntu 4.8.0-46.49~16.04.1-generic 4.8.17
Uname: Linux 4.8.0-46-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CurrentDesktop: GNOME
Date: Fri Apr 7 14:22:41 2017
InstallationDate: Installed on 2016-05-18 (323 days ago)
InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
SourcePackage: gdm3
UpgradeStatus: Upgraded to xenial on 2016-06-21 (289 days ago)

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "Dependencies.txt" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

[Борис Михаилов (boriseto)]

Not a member of the Ubuntu review team, sorry and I didn't notice that I've clicked the flag. I apologize about that as well.

[Борис Михаилов (boriseto)]

This is weird but for some reason, having some of the kde-telepathy package installed (not on my machine atm so can't really tell which two were), breaks my apt but makes gdm3 to work (while making me somehow break lightdm and sddm). Now I can't login to the previous ones, but can to gdm3. Also removing the package package with synaptic, makes gdm3 unusable again.
This does not make any sense to me.

[Jeremy Bícha (jbicha)]

I recently fixed a bug which prevented GDM from working (LP: #1686257) for people who had GDM installed but not Ubuntu GNOME. Could you give it a try and let us know if that fixes your issue?

[gork skoal (gork.skoal)]

I can confirm their is a bug. I've also reported something similar on reddit.
GPU: GeoForce GTX 390
:Drivers: 390.

[Daniel van Vugt (vanvugt)]

Gork,

This bug is about a Radeon system.

If you have similar problems with Nvidia GPUs then please look at these instead:
  https://bugs.launchpad.net/ubuntu/+source/gdm3/+bugs?field.tag=nvidia
or log a new bug.

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu GNOME 16.04 (xenial) reached end-of-life in April 2019.

https://ubuntugnome.org/ubuntu-gnome-16-04-lts-is-here/
https://wiki.ubuntu.com/XenialXerus/ReleaseNotes/UbuntuGNOME

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in.