Thanks for upstreaming the issue
** Changed in: gdm3 (Ubuntu)
Status: Incomplete => Triaged
** Bug watch added: gitlab.gnome.org/GNOME/mutter/issues #504
https://gitlab.gnome.org/GNOME/mutter/issues/504
** Also affects: gnome-shell via
https://gitlab.gnome.org/GNOME/mutter/issues/504
Importance: Unknown
Status: Unknown
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https://bugs.launchpad.net/bugs/1820423
Title:
monitors.xml is not parsed or applied correctly during login after
reboot or shutdown
Status in gdm:
New
Status in GNOME Shell:
Unknown
Status in gdm3 package in Ubuntu:
Triaged
Status in mutter package in Ubuntu:
Incomplete
Bug description:
WORKAROUND
Replace gdm3 with slick-greeter + lightdm-settings + gnome-screensaver
+ numlockx(optionally)
TL;DR
Correct positioning and working of multiple displays until reboot or
shutdown and then subsequent login from gdm3. HDMI monitor(projector)
goes blank and the VGA monitor only shows 'Secondary' monitor screen
without any user visible controls or windows as they are all being
painted to the now blanked 'Primary' HDMI connected display.
REPRODUCTION
After a clean install of Ubuntu 18.10, connecting a FHD(1920x1080) LED
monitor to the VGA port of a DELL Optiplex 390 desktop tower,
connecting a wireless HDMI Tx/Rx(LKV HDbitT-4K) to the HDMI port with
a FHD projector and then configuring the logical monitor layout in the
"Displays" settings dialog, I can successfully create and use a multi
monitor setup in my current session.
However, after a reboot or power cycle of the computer and a
successful login from GDM(gdm3), the HDMI goes dark(blank?) and the
VGA monitor shows as 'Secondary' monitor even though I set it as
'Primary' in the "Displays" dialog.
The monitors.xml file, attached, shows the correct layout and survives
the reboot without alteration.
I am unable to see anything on the 'Primary' display, which has
incorrectly been given to the HDMI projector. Unseating the HDMI cable
does not restore the VGA to 'Primary' display automatically and I must
reboot the computer while leaving the HDMI unplugged in order to
restore my ability to see the 'Primary' display on the VGA connection.
Replacing GDM(gdm3) with LightDM(slick-greeter) fixes the issue and is
repeatedly provable through multiple reboots or changes to the logical
layout of the screens in the 'Displays' settings of gnome-control-
center.
ERRORS(syslog)
"Failed to get current display configuration state:
GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Name
"org.gnome.Mutter.DisplayConfig" does not exist"
gnome-shell[3007]: JS ERROR: Exception in callback for signal: loaded:
TypeError: monitor is
null#012_prepareStartupAnimation@resource:///org/gnome/shell/ui/layout.js:653:17#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_loadBackground/signalId<@resource:///org/gnome/shell/ui/layout.js:608:13#012_emit@resource:///org/gnome/gjs/modules/signals.js:128:27#012_init/id<@resource:///org/gnome/shell/ui/background.js:512:17
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: gdm3 3.30.1-1ubuntu5.1
ProcVersionSignature: Ubuntu 4.18.0-16.17-generic 4.18.20
Uname: Linux 4.18.0-16-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Mar 16 13:50:52 2019
InstallationDate: Installed on 2019-03-07 (8 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64
(20181017.3)
SourcePackage: gdm3
UpgradeStatus: No upgrade log present (probably fresh install)
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