Bug 462626

Summary:	Dual Monitor setup: Primary Display does not wake up after energy save mode
Product:	[Plasma] KScreen	Reporter:	Julius R. <c3i8zv295>
Component:	common	Assignee:	kscreen-bugs-null <kscreen-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	major	CC:	bert, c3i8zv295, josete, nate
Priority:	NOR
Version:	5.27.4
Target Milestone:	---
Platform:	Manjaro
OS:	Linux
Latest Commit:		Version Fixed In:

Description Julius R. 2022-12-04 10:04:53 UTC

I am using 2 Displays: One is connected as primary on DP4, the other one is a secondary display in another room, connected via HDMI1.
When the displays are powered off due to energy saving schedule, the primary display does not wake up again. When triggering the wake up (mouse movement, key input), the displays both get powered up again (as can be seen by the stanby LEDs), but the primary stays black. In the .local/share/kscreen config file, the line with "enabled" seems to be stuck at "false".

Once I manually unplug the second display (HDMI1), the primary display shows the desktop again.

Complete Bug description with steps taken to alleviate:
https://forum.manjaro.org/t/monitor-does-not-turn-back-on-after-energy-saving/128030/4

Comment 1 Nate Graham 2022-12-05 19:19:42 UTC

Are one or both displays connected to an NVIDIA GPU, by any chance?

Comment 2 Julius R. 2022-12-05 22:22:24 UTC

(In reply to Nate Graham from comment #1)
> Are one or both displays connected to an NVIDIA GPU, by any chance?

Hi Nate, both are connected to one Nvidia RTX 3070 indeed.

Comment 3 Julius R. 2022-12-05 22:24:21 UTC

(In reply to Nate Graham from comment #1)
> Are one or both displays connected to an NVIDIA GPU, by any chance?

You are right, it is probably 460341.

Comment 4 Nate Graham 2022-12-06 00:33:43 UTC

Yep.

*** This bug has been marked as a duplicate of bug 460341 ***

Comment 5 joseteluisete 2023-04-16 22:24:44 UTC Comment hidden (spam)

Hi!
I don't know if this is the right place to write this.
When my system wakes up I just see the mouse and a black screen.
I can change between apps with Alt+Tab and I can open apps assigned to keys, Meta+E > Dolphin, for example.
I don't see the task manager or the Desktop.
I opened a topic in Manjaro Forums.
As I mention there I have realized this happens after installing some particular packages.
https://forum.manjaro.org/t/screen-stays-off-after-waking-up/138830
The fact is I have a Monitor and a TV but I don't use Nvidia. I just use the Intel GPU inside the i9 processor.
I use HDMI and DVI cables. I don't know if that's important to mention.

Comment 6 joseteluisete 2023-04-17 04:49:00 UTC Comment hidden (spam)

In my previous post, I failed to specify the correct Plasma version. It's 5.27.4.
I have also seen that I don't know exactly when this problem started.
I thought it did when installing some particular packages but I was wrong.
I guess I had no problems with version 5.26.5.

Comment 7 Nate Graham 2023-04-17 15:30:13 UTC Comment hidden (spam)

Hi Jose,

Please submit a new bug report for that issue. Thanks!