Discussion:
[plasmashell] [Bug 391558] New: External monitor does not wake up
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Petr Nehez
2018-03-08 11:19:36 UTC
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https://bugs.kde.org/show_bug.cgi?id=391558

Bug ID: 391558
Summary: External monitor does not wake up
Product: plasmashell
Version: 5.12.2
Platform: Manjaro
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: ***@davidedmundson.co.uk
Reporter: ***@gmail.com
CC: plasma-***@kde.org
Target Milestone: 1.0

My external monitor is not waken up when I move with a mouse or press a key
after it has been previously switched off by the system while laptop’s screen
is not used at all (OFF) while the monitor is plugged in.

I have to unplug it and then plug it again.

Any idea?

Manjaro KDE, Plasma 5.12.2, Frameworks 5.43, Qt, 5.10.1
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Petr Nehez
2018-03-11 07:28:43 UTC
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Petr Nehez <***@gmail.com> changed:

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Petr Nehez
2018-03-11 07:30:15 UTC
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https://bugs.kde.org/show_bug.cgi?id=391558

--- Comment #1 from Petr Nehez <***@gmail.com> ---
Does anybody know how to find such problem in logs?

I enabled KScreen logging but there I don't see anything...

In which log can I see something regarding switching off the screen and waking
up again?
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Petr Nehez
2018-03-12 21:18:58 UTC
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https://bugs.kde.org/show_bug.cgi?id=391558

--- Comment #2 from Petr Nehez <***@gmail.com> ---
The workaround to wake up the monitor is to start a new terminal (e.g.
Ctrl+Alt+F2) and then back to terminal 1 by pressing Ctrl+Alt+F1.

This issue is super annoying...
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Petr Nehez
2018-03-12 21:23:39 UTC
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https://bugs.kde.org/show_bug.cgi?id=391558

--- Comment #3 from Petr Nehez <***@gmail.com> ---
https://forum.manjaro.org/t/external-monitor-does-not-wake-up/41985
https://forum.manjaro.org/t/screen-goes-black-after-10-mins/41857
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Nate Graham
2018-03-13 16:32:05 UTC
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https://bugs.kde.org/show_bug.cgi?id=391558

Nate Graham <***@kde.org> changed:

What |Removed |Added
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Resolution|--- |DOWNSTREAM
Status|UNCONFIRMED |RESOLVED
CC| |***@kde.org

--- Comment #4 from Nate Graham <***@kde.org> ---
Based on the issues outlined in those forum thread, this regression coincided
with updating the kernel. Please do some more debugging on the Manjaro forums
to isolate the issue. If indeed it's a kernel regression, the issue should be
reported on https://bugzilla.kernel.org/.
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Petr Nehez
2018-03-14 06:16:47 UTC
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Petr Nehez <***@gmail.com> changed:

What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Resolution|DOWNSTREAM |---

--- Comment #5 from Petr Nehez <***@gmail.com> ---
I went back to 4.14 and then downgraded this kernel (even 6 updates back) and
the issue is still present.
So it could not be the kernel issue because I am 100% sure this was working
fine before the last update of KDE from Manjaro.

Could you suggest me ways how to isolate the issue?
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Petr Nehez
2018-03-14 06:33:03 UTC
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--- Comment #6 from Petr Nehez <***@gmail.com> ---
Hmm, I upgraded my linux414 packages back to the latest ones and now it seems
to be working fine...
I am confused.

I will be watching it and if it starts to work again then... would it be
something with the kernel?
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Sebastian Kügler
2018-03-14 10:38:22 UTC
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https://bugs.kde.org/show_bug.cgi?id=391558

Sebastian Kügler <***@kde.org> changed:

What |Removed |Added
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Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID

--- Comment #7 from Sebastian Kügler <***@kde.org> ---
It's highly unlikely that this is a Plasma issue, so I'll close this bugreport
(it's not useful to track this here, just muddies up our bug list and makes it
harder to manage).

Thanks for the report however!
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Petr Nehez
2018-03-14 10:43:16 UTC
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--- Comment #8 from Petr Nehez <***@gmail.com> ---
This issue is still present on my laptop though...

Could you at least help me and suggest me a way (ways) how to narrow down the
cause?
Thanks in advance.
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Petr Nehez
2018-05-22 08:53:31 UTC
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Petr Nehez <***@gmail.com> changed:

What |Removed |Added
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Status|RESOLVED |CLOSED
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