Bug 494899 - After update to Plasma 6.2, black screen with cursor after boot-up or screen unlock until switching TTYs with DDC active
Summary: After update to Plasma 6.2, black screen with cursor after boot-up or screen ...
Status: RESOLVED FIXED
Alias: None
Product: plasmashell
Classification: Plasma
Component: Power management & brightness (other bugs)
Version First Reported In: 6.2.0
Platform: Arch Linux Linux
: NOR normal
Target Milestone: 1.0
Assignee: Plasma Bugs List
URL:
Keywords: regression
: 495012 495456 (view as bug list)
Depends on:
Blocks:
 
Reported: 2024-10-17 00:09 UTC by garybig
Modified: 2025-11-10 08:11 UTC (History)
8 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In: 6.3.5 or earlier
Sentry Crash Report:


Attachments
attachment-3588040-0.html (1.96 KB, text/html)
2025-05-09 20:07 UTC, garybig
Details
attachment-1368716-0.html (1.99 KB, text/html)
2025-05-13 18:47 UTC, garybig
Details
attachment-1983041-0.html (1.21 KB, text/html)
2025-05-14 20:45 UTC, garybig
Details

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Description garybig 2024-10-17 00:09:39 UTC
SUMMARY
DDCUTIL, powerdevil, plasma-desktop ISSUE ?

STEPS TO REPRODUCE
1. start up EndeavourOS or CachyOS with recent Plasma 6.2 update
2. boots up, gets to plasma desktop, goes to black screen
3. if I open up terminal with CTL-ALT #, and return to plasma-desktop with CTL-ALT# :   NORMAL plasma desktop

OBSERVED RESULT
black screen

EXPECTED RESULT
plasma desktop

SOFTWARE/OS VERSIONS
current

Linux/KDE Plasma: 
KDE Plasma Version: 6.2

ADDITIONAL INFORMATION

Lenovo Legion T5 26ARA8
AMD Ryzen 7 7700
Radeon RX 6600
samsung s32ag55 monitor
Comment 1 Nate Graham 2024-11-08 22:23:30 UTC
Is this seen on both X11 and Wayland, or only one?
Comment 2 Nate Graham 2024-11-08 22:27:04 UTC
*** Bug 495191 has been marked as a duplicate of this bug. ***
Comment 3 Nate Graham 2024-11-08 22:40:09 UTC
*** Bug 495607 has been marked as a duplicate of this bug. ***
Comment 4 Nate Graham 2024-11-08 22:47:32 UTC
*** Bug 495012 has been marked as a duplicate of this bug. ***
Comment 5 Nate Graham 2024-11-08 22:55:36 UTC
From other bug reports reported by the same person, it affects the system with Powerdebil 6.2 0r later with DDC active.
Comment 6 Nate Graham 2024-11-11 22:25:21 UTC
*** Bug 495456 has been marked as a duplicate of this bug. ***
Comment 7 garybig 2024-11-27 17:37:48 UTC
STILL a bug in powerdevil 6.2.4

same fault, still a bug --  Hello?
Comment 8 Nate Graham 2025-05-09 17:47:40 UTC
I'm sorry we weren't able to figure this out yet. Can you check and see if it's still an issue in Plasma 6.3.5 or later? Thanks!
Comment 9 garybig 2025-05-09 20:07:33 UTC
Created attachment 181116 [details]
attachment-3588040-0.html

For some reason I do not understand, powerdevil 6.3.4 works with an Arco
Linux install.  Powerdevil v6.3.4 on endeavourOS had the same problem and I
switched over to Arco. — now Arco Linux is ending, but continued to work
with powerdevil v 6.3.5.
Just too many hardware variables to beta test on, I suppose.

On Fri, May 9, 2025 at 10:47 AM Nate Graham <
bugzilla_noreply_at_kde.org_garybig@duck.com> wrote:

> https://bugs.kde.org/show_bug.cgi?id=494899
>
> Nate Graham <nate@kde.org> changed:
>
>            What    |Removed                     |Added
>
> ----------------------------------------------------------------------------
>          Resolution|---                         |WAITINGFORINFO
>              Status|REPORTED                    |NEEDSINFO
>
> --- Comment #8 from Nate Graham <nate@kde.org> ---
> I'm sorry we weren't able to figure this out yet. Can you check and see if
> it's
> still an issue in Plasma 6.3.5 or later? Thanks!
>
> --
> You are receiving this mail because:
> You reported the bug.
Comment 10 Nate Graham 2025-05-13 16:03:18 UTC
Indeed. Thanks for following up!
Comment 11 garybig 2025-05-13 18:47:46 UTC
Created attachment 181251 [details]
attachment-1368716-0.html

I did not report the issue resolved. I allowed powerdevil v 6.3.4 to
install on endeavourOS and had same black screen issue.    Then  I
installed Arco Linux and KDE plasma with 6.3.4 and it worked.  I have not
tested 6.3.5 on EOS.  POWERDEVIL 6.3.4 defaults to a black screen on both
cachyOS and EOS. It ran okay in an Arco Linux install ONLY.

On Tue, May 13, 2025 at 9:03 AM Nate Graham <
bugzilla_noreply_at_kde.org_garybig@duck.com> wrote:

> https://bugs.kde.org/show_bug.cgi?id=494899
>
> Nate Graham <nate@kde.org> changed:
>
>            What    |Removed                     |Added
>
> ----------------------------------------------------------------------------
>    Version Fixed In|                            |6.3.5 or earlier
>          Resolution|WAITINGFORINFO              |FIXED
>              Status|NEEDSINFO                   |RESOLVED
>
> --- Comment #10 from Nate Graham <nate@kde.org> ---
> Indeed. Thanks for following up!
>
> --
> You are receiving this mail because:
> You reported the bug.
Comment 12 Nate Graham 2025-05-14 17:39:27 UTC
If you can't reproduce the original issue anymore, I don't think we have any other options but to consider it resolved.
Comment 13 garybig 2025-05-14 20:45:24 UTC
Created attachment 181308 [details]
attachment-1983041-0.html

* "but to consider it resolved" * Fair enough.
Apparently it was just my combination of components in this PC that allowed
the bug to happen.

...or someone stumbled upon a solution and kept it to themselves.  smile

On Wed, May 14, 2025 at 10:56 AM Nate Graham <
bugzilla_noreply_at_kde.org_garybig@duck.com> wrote:

> https://bugs.kde.org/show_bug.cgi?id=494899
>
> --- Comment #12 from Nate Graham <nate@kde.org> ---
> If you can't reproduce the original issue anymore, I don't think we have
> any
> other options but to consider it resolved.
>
> --
> You are receiving this mail because:
> You reported the bug.