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Bug 783854 - Night light isn't working on dual monitors
Night light isn't working on dual monitors
Status: RESOLVED DUPLICATE of bug 780167
Product: gnome-control-center
Classification: Core
Component: Display
3.24.x
Other Linux
: Normal major
: ---
Assigned To: Debarshi Ray
Control-Center Maintainers
: 784855 (view as bug list)
Depends on:
Blocks:
 
 
Reported: 2017-06-16 06:51 UTC by Daniel
Modified: 2017-12-07 15:38 UTC
See Also:
GNOME target: ---
GNOME version: ---



Description Daniel 2017-06-16 06:51:36 UTC
I have the night light feature turned on. It only works on one of my monitors, but not both.

This issue has been apparent from the moment I installed the OS and made no changes, so it's definitely not due to me breaking anything.
Comment 1 Yethiel 2017-06-19 20:40:09 UTC
I am also using a fresh installation (Manjaro net install with Gnome)
I have three monitors connected and it works on two of them. 
It does work on the primary screen (ID 2) and on the smaller secondary screen (ID 1).
The Secondary screen with ID 3 is not affected by the Night Light.
The arrangement of the monitors does not seem to change anything.
Comment 2 Daniel 2017-06-20 08:03:15 UTC
Some extra specs:

OS: Ubuntu Gnome 17.04 64-bit
RAM: 8GB
CPU: Intel Core i5 4670K
GPU: MSI Radeon R9 280X

Let me know if you need anything else
Comment 3 Daniel 2017-06-20 08:04:27 UTC
And the monitors are both Acer G276HL
Comment 4 A.S. Boerema 2017-06-21 13:33:02 UTC
Same for me on Ubuntu Gnome 17.04
primary monitor dell xpx 9360
secondary LG monitor connected via displaylink over usb-c
Comment 5 Spencer 2017-06-22 01:04:49 UTC
I am having the identical issue that Yethiel is. Fresh install of Manjaro Gnome and a triple Acer monitor setup. Display ID's 1 and 2 work correctly but ID 3 does not respond whatsoever.

System Information:

CPU:    Ryzen 7 1700 @ 4.2 Ghz
RAM:    16 GB GSkill Trident-Z 3200
GPU:    Asus GTX 1070 Strix
Mobo:   Asus Prime X370 Pro

Please let me know if there are any logs specifications needed that i am unaware of. I'll be happy to post whatever is needed.
Comment 6 Matthias 2017-07-24 19:45:47 UTC
CPU: Intel Core i5-6500
GPU: Radeon RX 480 on mesa
Monitors: 2 Acer S273HLAbmii via HDMI
Comment 7 Jim Heald 2017-08-18 00:03:16 UTC
CPU: Intel Core i7-6700k
Monitors: 2 Acer R240HY over HDMI

Output from `colormgr get-devices`:

Object Path:   /org/freedesktop/ColorManager/devices/xrandr_Acer_Technologies_R240HY_T4BAA0012400_steelcowboy_1000
Owner:         steelcowboy
Created:       August 17 2017, 05:03:51 PM
Modified:      August 17 2017, 05:03:51 PM
Type:          display
Enabled:       Yes
Embedded:      No
Model:         R240HY
Vendor:        Acer
Serial:        T4BAA0012400
Seat:          seat0
Scope:         temp
Colorspace:    rgb
Device ID:     xrandr-Acer Technologies-R240HY-T4BAA0012400
Profile 1:     icc-895743129084eb16504b3bdfc7b96c3a
               /home/steelcowboy/.local/share/icc/edid-cdf0533863023acc9ccc442d0d09368e.icc
Profile 2:     icc-5a745dd26e0c190116c14fd17fe69625
               /var/lib/gdm/.local/share/icc/edid-cdf0533863023acc9ccc442d0d09368e.icc
Profile 3:     icc-73bcc52622b344ac90ce5bbb709d7c41
               /var/lib/gdm/.local/share/icc/edid-2997566b03f5ca810f020a7720daed87.icc
Metadata:      XRANDR_name=HDMI-1
Metadata:      OutputPriority=primary
Metadata:      OwnerCmdline=/usr/libexec/gsd-color 
Metadata:      OutputEdidMd5=cdf0533863023acc9ccc442d0d09368e
Comment 8 Richard Hughes 2017-08-18 18:27:03 UTC
(In reply to Jim Heald from comment #7)
> CPU: Intel Core i7-6700k
> Monitors: 2 Acer R240HY over HDMI
> /org/freedesktop/ColorManager/devices/
> xrandr_Acer_Technologies_R240HY_T4BAA0012400_steelcowboy_1000

Just one monitor according to colord. What does the display panel in the control panel show?
Comment 9 Jim Heald 2017-08-18 18:41:11 UTC
It shows both monitors, and I can go in and change things for either monitor (set one as primary, or to mirror, etc)
Comment 10 Henry Snow 2017-09-07 23:22:59 UTC
I also am seeing a similar issue. 

1 builtin display and 2 Acer R240HY monitors

display in control panel shows 3 displays:

Display 1: Built-in, nightlight works
Display 2: Acer, connected via mini-displayport > DVI adapter, nightlight works
Display 3: Acer, connected via VGA, nightlight does not work


00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06) (prog-if 00 [VGA controller])
	Subsystem: Lenovo ThinkPad T440p
	Flags: bus master, fast devsel, latency 0, IRQ 30
	Memory at c0000000 (64-bit, non-prefetchable) [size=4M]
	Memory at b0000000 (64-bit, prefetchable) [size=256M]
	I/O ports at 3000 [size=64]
	[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
	Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [d0] Power Management version 2
	Capabilities: [a4] PCI Advanced Features
	Kernel driver in use: i915
	Kernel modules: i915


(non-printer) output of `colormgr get-devices`:
Object Path:   /org/freedesktop/ColorManager/devices/xrandr_Undefined_R240HY_T4BAA0012400_henrys_1000
Owner:         henrys
Created:       September  7 2017, 01:27:49 PM
Modified:      September  7 2017, 01:27:49 PM
Type:          display
Enabled:       Yes
Embedded:      No
Model:         R240HY
Vendor:        Undefined
Serial:        T4BAA0012400
Seat:          seat0
Scope:         temp
Colorspace:    rgb
Device ID:     xrandr-Undefined-R240HY-T4BAA0012400
Profile 1:     icc-2cff89d4ebe4fc4022a581ddb15b0788
               /var/lib/gdm/.local/share/icc/edid-16e12fb83ff638726a8df37d01bdf5d8.icc
Metadata:      XRANDR_name=HDMI1
Metadata:      OutputPriority=primary
Metadata:      OwnerCmdline=/usr/lib/gnome-settings-daemon/gsd-color 
Metadata:      OutputEdidMd5=644ebe89f75e3552f688a0f16908e8a4

Object Path:   /org/freedesktop/ColorManager/devices/xrandr_Undefined_henrys_1000
Owner:         henrys
Created:       September  7 2017, 01:27:49 PM
Modified:      September  7 2017, 01:27:49 PM
Type:          display
Enabled:       Yes
Embedded:      Yes
Model:         ThinkPad T440p
Vendor:        Lenovo
Serial:        unknown
Seat:          seat0
Scope:         temp
Colorspace:    rgb
Device ID:     xrandr-Undefined
Metadata:      XRANDR_name=eDP1
Metadata:      OutputPriority=secondary
Metadata:      OwnerCmdline=/usr/lib/gnome-settings-daemon/gsd-color 
Metadata:      OutputEdidMd5=7ccb31c731ebf160b22f366c7572eadc
Comment 11 yaomtc 2017-10-01 01:29:36 UTC
I've started noticing a problem like this. My main monitor is a 4K display attached via DisplayPort. Recently Night Light wouldn't work unless I had my secondary display (1080p monitor over HDMI) disabled. And just now, I didn't have Night Light again, so I tried disabling my secondary monitor, but that time it didn't fix it. I clicked to revert back to previous settings, and then Night Light came back.

This may or may not be connected to this issue I posted:

https://bugzilla.gnome.org/show_bug.cgi?id=788026
Comment 12 Alexandre Franke 2017-10-03 00:26:21 UTC
*** Bug 784855 has been marked as a duplicate of this bug. ***
Comment 13 Alexandre Franke 2017-10-03 00:36:20 UTC

*** This bug has been marked as a duplicate of bug 780167 ***
Comment 14 gunwald 2017-12-07 15:38:14 UTC
I can confirm the issue on Ubuntu 17.10 with a dual monitor setup. Night light only works on the primary monitor which has the ID 2. Night light is enabled for both in system settings, but I noticed switching night light on and of for the secondary monitor does not have any effect on this very monitor but rather on the primary monitor.