Ubuntu dual displays lose signal, main laptop display goes inactive/non responsive when log out?

I am running Ubuntu 18.04 and I have two identical external displays(LG) which are connected to my laptop. One through HDMI directly, the other display is connected by VGA. I'm experiencing a couple of issues with this setup:

When both displays are plugged in and when I log out/close laptop lid both displays lose signal and the main laptop display becomes unresponsive (purple screen with mouse icon which doesn't react).

Additionally, when I try to restart the laptop and either of the monitors are connected, the laptop display will return to the unresponsive display state.

To correct either of these, I need to first disconnect all external displays, restart the laptop then connect the HDMI display followed by the VGA display(in that order).

The displays worked perfectly until a couple of days ago, the only change I made to the system was to edit

sudo -H gedit /etc/default/grub

specifically, changing the setting:

GRUB_CMDLINE_LINUX="acpi=force irqpoll"

then updating the GRUB.

I have gone as far as to delete my ~/.config/monitor.xml files, including the untiy-monitor.xml files to no avail.

Edit: Another odd behaviour is that when I go to Settings -> Devices -> Screen Display and make a change then apply those changes all the screens go inactive as usual.

edited Feb 7 at 21:02

baelx

1,852817

asked Feb 7 at 17:17

Kammryn Dancy

I found a solution for my machine, just running the command xset s off then xset -dpms

– Kammryn Dancy
Feb 11 at 16:03

add a comment |

When both displays are plugged in and when I log out/close laptop lid both displays lose signal and the main laptop display becomes unresponsive (purple screen with mouse icon which doesn't react).

Additionally, when I try to restart the laptop and either of the monitors are connected, the laptop display will return to the unresponsive display state.

To correct either of these, I need to first disconnect all external displays, restart the laptop then connect the HDMI display followed by the VGA display(in that order).

The displays worked perfectly until a couple of days ago, the only change I made to the system was to edit

sudo -H gedit /etc/default/grub

specifically, changing the setting:

GRUB_CMDLINE_LINUX="acpi=force irqpoll"

then updating the GRUB.

I have gone as far as to delete my ~/.config/monitor.xml files, including the untiy-monitor.xml files to no avail.

Edit: Another odd behaviour is that when I go to Settings -> Devices -> Screen Display and make a change then apply those changes all the screens go inactive as usual.

edited Feb 7 at 21:02

baelx

1,852817

asked Feb 7 at 17:17

Kammryn Dancy

I found a solution for my machine, just running the command xset s off then xset -dpms

– Kammryn Dancy
Feb 11 at 16:03

add a comment |

When both displays are plugged in and when I log out/close laptop lid both displays lose signal and the main laptop display becomes unresponsive (purple screen with mouse icon which doesn't react).

Additionally, when I try to restart the laptop and either of the monitors are connected, the laptop display will return to the unresponsive display state.

To correct either of these, I need to first disconnect all external displays, restart the laptop then connect the HDMI display followed by the VGA display(in that order).

The displays worked perfectly until a couple of days ago, the only change I made to the system was to edit

sudo -H gedit /etc/default/grub

specifically, changing the setting:

GRUB_CMDLINE_LINUX="acpi=force irqpoll"

then updating the GRUB.

I have gone as far as to delete my ~/.config/monitor.xml files, including the untiy-monitor.xml files to no avail.

Edit: Another odd behaviour is that when I go to Settings -> Devices -> Screen Display and make a change then apply those changes all the screens go inactive as usual.

edited Feb 7 at 21:02

baelx

1,852817

asked Feb 7 at 17:17

Kammryn Dancy

When both displays are plugged in and when I log out/close laptop lid both displays lose signal and the main laptop display becomes unresponsive (purple screen with mouse icon which doesn't react).

Additionally, when I try to restart the laptop and either of the monitors are connected, the laptop display will return to the unresponsive display state.

To correct either of these, I need to first disconnect all external displays, restart the laptop then connect the HDMI display followed by the VGA display(in that order).

The displays worked perfectly until a couple of days ago, the only change I made to the system was to edit

sudo -H gedit /etc/default/grub

specifically, changing the setting:

GRUB_CMDLINE_LINUX="acpi=force irqpoll"

then updating the GRUB.

I have gone as far as to delete my ~/.config/monitor.xml files, including the untiy-monitor.xml files to no avail.

Edit: Another odd behaviour is that when I go to Settings -> Devices -> Screen Display and make a change then apply those changes all the screens go inactive as usual.

ubuntu laptop multiple-monitors hdmi

edited Feb 7 at 21:02

baelx

1,852817

asked Feb 7 at 17:17

Kammryn Dancy

edited Feb 7 at 21:02

baelx

1,852817

asked Feb 7 at 17:17

Kammryn Dancy

edited Feb 7 at 21:02

baelx

1,852817

edited Feb 7 at 21:02

baelx

1,852817

edited Feb 7 at 21:02

baelx

1,852817

asked Feb 7 at 17:17

Kammryn Dancy

asked Feb 7 at 17:17

Kammryn Dancy

asked Feb 7 at 17:17

Kammryn Dancy

I found a solution for my machine, just running the command xset s off then xset -dpms

– Kammryn Dancy
Feb 11 at 16:03

add a comment |

I found a solution for my machine, just running the command xset s off then xset -dpms

– Kammryn Dancy
Feb 11 at 16:03

I found a solution for my machine, just running the command xset s off then xset -dpms

– Kammryn Dancy
Feb 11 at 16:03

add a comment |

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