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Bug 781792 - Night light only works on primary display
Night light only works on primary display
Status: RESOLVED DUPLICATE of bug 784855
Product: gnome-settings-daemon
Classification: Core
Component: color
3.24.x
Other Linux
: Normal normal
: ---
Assigned To: Richard Hughes
gnome-settings-daemon-maint
Depends on:
Blocks:
 
 
Reported: 2017-04-26 19:02 UTC by chais.z3r0
Modified: 2017-10-03 00:18 UTC
See Also:
GNOME target: ---
GNOME version: ---

Attachments
Photo of dual head setup with active night light (1.53 MB, image/jpeg)
2017-04-26 19:02 UTC, chais.z3r0 		Details

Description chais.z3r0 2017-04-26 19:02:58 UTC 
Created attachment 350501 [details]
Photo of dual head setup with active night light

What it says in the title. When night light switches on it only affects the primary display.
Comment 1 Damien Churchill 2017-05-13 11:31:49 UTC 
I'm also seeing this behaviour, noticed in the journal that it seems to be unable to find the second monitor.

May 13 12:23:21 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:21 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:21 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:21 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:21 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:21 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:22 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:23 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:23 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:23 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist
May 13 12:23:24 earth gsd-color[3453]: could not find device: property match 'XRANDR_name'='DP-2' does not exist

% xrandr --listactivemonitors
Monitors: 2
 0: +*DP-0 3840/607x2160/345+0+0  DP-0
 1: +DP-2 3840/607x2160/345+3840+0  DP-2

There doesn't seem to be any impact as to what monitor configuration is (primary|secondary; secondary|primary; mirror|mirror), it's always the right hand monitor (which is DP-2) that doesn't have the colour settings applied.
Comment 2 Alexandre Franke 2017-10-03 00:18:31 UTC 

*** This bug has been marked as a duplicate of bug 784855 ***