Public bug reported:
My scenario is:
- Laptop screen (eDP-1) (3840x2400)
- External Monitor, plugged in via kvm (DP-1-2) (1920x1200)
The setup I want:
- With both screens on, external should appear to the right of laptop; external
should be primary
- With just the laptop screen on, it should be primary
- With the laptop lid closed (which causes the screen to be disabled but still
connected) the external should be primary
My current display settings are attached.
What I observe is:
1. starting scenario: both monitors on, with the "both" profile checked.
2. if I then close the lid, the laptop monitor becomes disabled as expected,
but the "both" profile is still checked, and is the only profile visible in the
"advanced" tab list (so i can't chose the "external" profile manually)
3. if I then reopen the lid, "both" is still checked, but it mirrors instead of
extending.
4. If i now manually reapply the "both" profile, it goes into my expected setup.
5. if i then use the kvm to disconnect the external monitor, the profile
switches to "main" and things seem correct
6. if i then use the kvm to reconnect the external monitor, the profile
switches back to "both" and things seem correct
Observing this, my guess is what's happening is disabling/enabling a
monitor without actually disconnecting isn't a factor in profile
switches, so switch between states 1 and 2 doesn't cause a profile
switch between the "external" and "both" profiles; it just stays in
"both" and gets somewhat confused.
Another observation (which might be a symptom of the same problem, not sure) is:
1. starting from state 4 (manually application of "both", everything seems okay)
2. if I close the lid, it stays in "both" (same observation as above, state 2)
3. if I now _also_ switch the kvm (leaving the monitor state as: external
disconnected, laptop disabled), I can't observe the state (no monitors, though
I assume there's some logging I could enable to find out)
4. If I now use the kvm to reenable the external, I observe that _both_
monitors are enabled, not just the external, and it's in "both" profile with
the laptop screen active (to the left) even though the laptop is still closed.
This is variable; sometimes it ends up mirrored instead of extended, which
(since the resolutions are different) is a state I can only recover from by
opening the laptop lid and configuring it from that monitor.
5. If I now use the dialog to manually disable the laptop screen, "both" is
visible but unchecked (and is the only visible profile).
My assumption here is that, when I disconnect the last active monitor,
the laptop monitor is automatically reactivated, and then the profile
switching problem is the same as above.
Anyway, I hope this state machine gives you enough to go on- if there is
some sort of logging I can enable to give you enough info to debug, let
me know!
This is with:
- xfce4-settings 4.18.4-0ubuntu3 (ubuntu 24.04.2)
- xubuntu-desktop 2.262
lsb_release -rd is
No LSB modules are available.
Description: Ubuntu 24.04.2 LTS
Release: 24.04
Let me know if there are any other versions that would be helpful.
Thanks!
** Affects: xfce4-settings (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "settings"
https://bugs.launchpad.net/bugs/2103844/+attachment/5866420/+files/settings
** Description changed:
- Sorry for the vagueness of the title, I'm not actually sure if this is a
- bug or I don't understand how it's supposed to work!
-
My scenario is:
- Laptop screen (eDP-1) (3840x2400)
- External Monitor, plugged in via kvm (DP-1-2) (1920x1200)
The setup I want:
- With both screens on, external should appear to the right of laptop;
external should be primary
- With just the laptop screen on, it should be primary
- With the laptop lid closed (which causes the screen to be disabled but
still connected) the external should be primary
My current display settings are attached.
What I observe is:
1. starting scenario: both monitors on, with the "both" profile checked.
2. if I then close the lid, the laptop monitor becomes disabled as expected,
but the "both" profile is still checked, and is the only profile visible in the
"advanced" tab list (so i can't chose the "external" profile manually)
- 3. if I then reopen the lid, "both" is still checked, but it mirrors instead
of extending.
+ 3. if I then reopen the lid, "both" is still checked, but it mirrors instead
of extending.
4. If i now manually reapply the "both" profile, it goes into my expected
setup.
5. if i then use the kvm to disconnect the external monitor, the profile
switches to "main" and things seem correct
6. if i then use the kvm to reconnect the external monitor, the profile
switches back to "both" and things seem correct
Observing this, my guess is what's happening is disabling/enabling a
monitor without actually disconnecting isn't a factor in profile
switches, so switch between states 1 and 2 doesn't cause a profile
switch between the "external" and "both" profiles; it just stays in
"both" and gets somewhat confused.
Another observation (which might be a symptom of the same problem, not sure)
is:
1. starting from state 4 (manually application of "both", everything seems
okay)
2. if I close the lid, it stays in "both" (same observation as above, state 2)
3. if I now _also_ switch the kvm (leaving the monitor state as: external
disconnected, laptop disabled), I can't observe the state (no monitors, though
I assume there's some logging I could enable to find out)
4. If I now use the kvm to reenable the external, I observe that _both_
monitors are enabled, not just the external, and it's in "both" profile with
the laptop screen active (to the left) even though the laptop is still closed.
This is variable; sometimes it ends up mirrored instead of extended, which
(since the resolutions are different) is a state I can only recover from by
opening the laptop lid and configuring it from that monitor.
5. If I now use the dialog to manually disable the laptop screen, "both" is
visible but unchecked (and is the only visible profile).
My assumption here is that, when I disconnect the last active monitor,
the laptop monitor is automatically reactivated, and then the profile
switching problem is the same as above.
Anyway, I hope this state machine gives you enough to go on- if there is
some sort of logging I can enable to give you enough info to debug, let
me know!
This is with:
- xfce4-settings 4.18.4-0ubuntu3 (ubuntu 24.04.2)
- xubuntu-desktop 2.262
lsb_release -rd is
No LSB modules are available.
Description: Ubuntu 24.04.2 LTS
Release: 24.04
Let me know if there are any other versions that would be helpful.
Thanks!
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https://bugs.launchpad.net/bugs/2103844
Title:
laptop with external monitor misbehaves in various scenarios
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