I can confirm this happens for me.
I did try to activate external monitor via xrandr, lxrandr and monitor setting
app.
It looks like when light-locker activates, it starts new Xorg instance,
and that new instance is using default monitor config: internal only, no
external ones.
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[Expired for light-locker (Ubuntu) because there has been no activity
for 60 days.]
** Changed in: light-locker (Ubuntu)
Status: Incomplete => Expired
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[Expired for lightdm-gtk-greeter (Ubuntu) because there has been no
activity for 60 days.]
** Changed in: lightdm-gtk-greeter (Ubuntu)
Status: Incomplete => Expired
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** Changed in: light-locker (Ubuntu)
Status: New => Incomplete
** Changed in: lightdm-gtk-greeter (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1796374
I do not know if this error message is related to your issue. Please
attach the full log file(s) to make sure that we do not miss anything
relevant.
Regardless of that, I would suggest to test with another greeter:
- install unity-greeter (sudo apt install --no-install-recommends unity-greeter)
-
It seems that it's not light-locker bug. Nothing special in
/var/log/lightdm, but in /var/log/Xorg.1.log found this error:
[ 23234.438] (==) ModulePath set to "/usr/lib/xorg/modules"
[ 23234.438] (II) The server relies on udev to provide the list of input
devices.
If no devices become availab
Did you try to activate the external monitor via xrandr?
Also, there may be some relevant information in the LightDM log files
located in /var/log/lightdm.
** Also affects: lightdm-gtk-greeter (Ubuntu)
Importance: Undecided
Status: New
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I added parameter "display-setup-script=/path/to/script" to
'/etc/lightdm/lightdm.conf. Script outputs "xrandr -q" command to file.
So I discovered that my monitor 'HDMI-0' is missing in that list. And it
only happens when I lock my session.
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Yes, occurs with 'nouveau' and with command "dm-tool switch-to-greeter".
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https://bugs.launchpad.net/bugs/1796374
Title:
locking session turns off external monitor
To manage notificati
Does this happen with the open source driver 'nouveau' too? Or, if you
run the command "dm-tool switch-to-greeter"?
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Title:
locking session turns
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