Next, please:
1. Reboot.
2. Plug in the external monitor and reproduce the problem again.
3. Collect the full system log by running:
journalctl -b > journal.txt
and attach the file 'journal.txt' here.
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https://bugs.launchpad.net/bugs/1796528
Title:
Problem with dual monitors
Status in gnome-shell package in Ubuntu:
Incomplete
Status in mutter package in Ubuntu:
Incomplete
Status in xorg-server package in Ubuntu:
Incomplete
Bug description:
Machine: HP 6735s with Mobile Intel® GM45 Express Chipset
O.S. 64bit Ubuntu 18.04.1 LTS
Gnome 3.28.2
I usually used an external monitor in Ubuntu 16.04 without any problem but
I've formatted and maked a clean install of Ubuntu 18.04. It works ok when
integrated monitor or external monitor are alone. If try to extend desktop to
both monitors, then integrated display go black and only a blinking mouse arrow
appears on it. External display is in closed loop trying to start, powering
on/off the backlight, like system were trying to send image but crashing. When
moving the mouse, arrow didn't go out of the integrated monitor. When I
disconnect the external monitor, then image come back to the integrated monitor
after some time. I've tried to edit "/etc/gdm3/custom.conf" to disable wayland
and use xorg, but it's still the same. I don't know where the problem came
from... gnome, intel drivers, graphic server...
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
DisplayManager: gdm3
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2018-08-07 (61 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
(20180725)
Package: xorg-server
PackageArchitecture: amd64
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=es_ES.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 4.15.0-34.37-generic 4.15.18
Tags: bionic
Uname: Linux 4.15.0-34-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
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