resuming from blank inactivity screen does not turn on 2nd display monitor
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| mate-power-manager (Ubuntu) |
New
|
Undecided
|
Unassigned | ||
Bug Description
The second display monitor, in a two display monitor configuration does not turn on when resuming from idle.
=== Reproduction ===
1. 'Screensaver Theme' is set to a 'Blank screen'. 'Regard the computer as idle' is set to 20 minutes.
2. wait 20 minutes, screen goes blank and the computer is considered idle.
both monitors display no output
3. press any key
primary monitor turns on and displays lockscreen login dialog
second monitor remains off
4. login
second monitor remains off
WORKAROUND:
5. Change some detail about the second monitor in the 'Monitor Preferences. (change 'Rotation' for example)
6. click 'Apply'
second monitor will turn on
7. when asked, 'Does the display look OK?', click 'Restore Previous Configuration'
Looking at the 'Monitor Preferences' after step 4., the second display monitor is still configured correctly. The system settings have not been reverted or lost (the system still seems aware of the second display monitor).
=== Information ===
(from System Information program)
Graphics Card: Quadro 600
Driver: 4.6.0 NVidia 390.116
Monitor 1: HP ZR30w (DFP-0)
Monitor 2: DELL P2419H (DFP-2) (this is the display monitor that does not turn back on)
Log file /var/log/Xorg.0.log does have information from the NVidia driver. There are no obvious errors in those logs.
During Step 5. in Reproduction, logs like the following appear:
[ 80659.574] (--) NVIDIA(GPU-0): CRT-0: disconnected
[ 80659.575] (--) NVIDIA(GPU-0): CRT-0: 400.0 MHz maximum pixel clock
[ 80659.575] (--) NVIDIA(GPU-0):
[ 80659.589] (--) NVIDIA(GPU-0): HP ZR30w (DFP-0): connected
[ 80659.589] (--) NVIDIA(GPU-0): HP ZR30w (DFP-0): Internal TMDS
[ 80659.589] (--) NVIDIA(GPU-0): HP ZR30w (DFP-0): 330.0 MHz maximum pixel clock
[ 80659.589] (--) NVIDIA(GPU-0):
[ 80659.590] (--) NVIDIA(GPU-0): DFP-1: disconnected
[ 80659.590] (--) NVIDIA(GPU-0): DFP-1: Internal TMDS
[ 80659.590] (--) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock
[ 80659.590] (--) NVIDIA(GPU-0):
[ 80659.590] (--) NVIDIA(GPU-0): DELL P2419H (DFP-2): connected
[ 80659.590] (--) NVIDIA(GPU-0): DELL P2419H (DFP-2): Internal DisplayPort
[ 80659.590] (--) NVIDIA(GPU-0): DELL P2419H (DFP-2): 480.0 MHz maximum pixel clock
[ 80659.590] (--) NVIDIA(GPU-0):
[ 80659.604] (--) NVIDIA(GPU-0): CRT-0: disconnected
[ 80659.604] (--) NVIDIA(GPU-0): CRT-0: 400.0 MHz maximum pixel clock
[ 80659.604] (--) NVIDIA(GPU-0):
[ 80659.618] (--) NVIDIA(GPU-0): HP ZR30w (DFP-0): connected
[ 80659.618] (--) NVIDIA(GPU-0): HP ZR30w (DFP-0): Internal TMDS
[ 80659.618] (--) NVIDIA(GPU-0): HP ZR30w (DFP-0): 330.0 MHz maximum pixel clock
[ 80659.618] (--) NVIDIA(GPU-0):
[ 80659.619] (--) NVIDIA(GPU-0): DFP-1: disconnected
[ 80659.619] (--) NVIDIA(GPU-0): DFP-1: Internal TMDS
[ 80659.619] (--) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock
[ 80659.619] (--) NVIDIA(GPU-0):
[ 80659.619] (--) NVIDIA(GPU-0): DELL P2419H (DFP-2): connected
[ 80659.619] (--) NVIDIA(GPU-0): DELL P2419H (DFP-2): Internal DisplayPort
[ 80659.619] (--) NVIDIA(GPU-0): DELL P2419H (DFP-2): 480.0 MHz maximum pixel clock
[ 80659.619] (--) NVIDIA(GPU-0):
[ 80664.823] (--) NVIDIA(GPU-0): CRT-0: disconnected
[ 80664.823] (--) NVIDIA(GPU-0): CRT-0: 400.0 MHz maximum pixel clock
[ 80664.823] (--) NVIDIA(GPU-0):
[ 80664.838] (--) NVIDIA(GPU-0): HP ZR30w (DFP-0): connected
[ 80664.838] (--) NVIDIA(GPU-0): HP ZR30w (DFP-0): Internal TMDS
[ 80664.838] (--) NVIDIA(GPU-0): HP ZR30w (DFP-0): 330.0 MHz maximum pixel clock
[ 80664.838] (--) NVIDIA(GPU-0):
[ 80664.839] (--) NVIDIA(GPU-0): DFP-1: disconnected
[ 80664.839] (--) NVIDIA(GPU-0): DFP-1: Internal TMDS
[ 80664.839] (--) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock
[ 80664.839] (--) NVIDIA(GPU-0):
[ 80664.839] (--) NVIDIA(GPU-0): DELL P2419H (DFP-2): connected
[ 80664.839] (--) NVIDIA(GPU-0): DELL P2419H (DFP-2): Internal DisplayPort
[ 80664.839] (--) NVIDIA(GPU-0): DELL P2419H (DFP-2): 480.0 MHz maximum pixel clock
[ 80664.839] (--) NVIDIA(GPU-0):
Ubuntu version
$ lsb_release -a
Distributor ID: Ubuntu
Description: Ubuntu 18.04.2 LTS
Release: 18.04
Codename: bionic
