[SOLVED] KDE - Manual sleep works perfectly but auto sleep is broken

TLGA · 2025-10-28 20:09:48

Hello,
I'm new to Arch Linux (and Linux in general) as I just installed it on my machine earlier today by following the general installation guide and this other one to setup full disk encryption with TPM https://wiki.archlinux.org/title/Dm-cry … ecure_Boot.

I managed to get everything working and I installed KDE Plasma as my DE. The only issue I'm having with it is the sleep feature, if I use systemctl suspend or click directly on sleep in the start menu I get the correct behavior and I'm able to wake up the system by clicking on any key. But if the system goes to sleep on its on after a set amount of type or when I click on the power button after configuring it to put the computer to sleep it seems to fail. The screen goes to black (though sometime it can also freeze on a still frame of the lock screen) but the computer stays active, the power led is not blinking as it should, the fans are still running normally and the rgb component are still lit up. When this happens the computer is completely frozen and I have to hard reboot it.

As I'm a noob regarding Linux I'm not sure where to start to debug this behavior and I couldn't find an answer that worked for me online.

Any help would be appreciated.

Best regards,
Thomas

Last edited by TLGA (2025-10-30 08:47:32)

seth · 2025-10-28 20:37:17

* use systemctl suspend or click directly on sleep in the start menu I get the correct behavior
* sleep on its on after a set amount of type or when I click on the power button … it seems to fail
* screen goes to black (though sometime it can also freeze on a still frame of the lock screen) but the computer stays active

There're sleep issues w/ KDE 6.5 OTR, see https://bbs.archlinux.org/viewtopic.php … 6#p2270076 but the trigger-split seems weird and the symptoms don't fit.

Please post the system journal after a supposedly successful sleep cycle,

sudo journalctl -b | curl -F 'file=@-' 0x0.st

(you get a link you can just share)

TLGA · 2025-10-29 08:49:05

Here is the system journal after a sleep cycle triggered from the button in the Application Launcher
https://0x0.st/K_2c.txt

seth · 2025-10-29 09:25:38

https://bbs.archlinux.org/viewtopic.php?id=309850 showed up and looks like a similar problem.

You're also getting

Oct 29 09:44:37 arch-pc dbus-broker[978]: A security policy denied :1.29 to send method call /org/freedesktop/login1/seat/seat0:org.freedesktop.login1.Seat.Inhibit to org.freedesktop.login1.
Oct 29 09:44:37 arch-pc kwin_wayland[1373]: Failed to delay sleep: Sender is not authorized to send message

but the sleep succeeds, so that's probably a red herring.

An additional element here is the hybrid GPU (2xAMD) setup w/ no outputs attached

Oct 29 09:45:02 arch-pc kernel: amdgpu 0000:7b:00.0: [drm] Cannot find any crtc or sizes

to the APU - can you disable that in the UEFI?

TLGA · 2025-10-29 09:47:41

Disabled the processor's GPU in UEFI and the issue still occurs like before : /

seth · 2025-10-29 22:42:05

https://bugs.kde.org/show_bug.cgi?id=510992#c11

blgrace · 2025-10-29 23:50:12

I also have the same issue on Plasma 6.5.1 / Linux 6.12.56-1-lts

* use systemctl suspend or click directly on sleep in the start menu I get the correct behavior
* sleep on its on after a set amount of type or when I click on the power button … it seems to fail
* screen goes to black (though sometime it can also freeze on a still frame of the lock screen) but the computer stays active

https://0x0.st/K_yH.txt

LuxFerre · 2025-10-30 00:25:11

As mentioned by Seth this is probably a KDE bug related to the kernel. For now

# chmod -x /usr/lib/kf6/kauth/wakeupsourcehelper

followed by a reboot will fix it.

blgrace · 2025-10-30 02:19:03

LuxFerre wrote:

As mentioned by Seth this is probably a KDE bug related to the kernel. For now
# chmod -x /usr/lib/kf6/kauth/wakeupsourcehelper
followed by a reboot will fix it.

Thank you very much
Cheers

TLGA · 2025-10-30 08:46:14

LuxFerre wrote:

As mentioned by Seth this is probably a KDE bug related to the kernel. For now
# chmod -x /usr/lib/kf6/kauth/wakeupsourcehelper
followed by a reboot will fix it.

Works for me.

Thank you for the help everyone

Arch Linux

#1 2025-10-28 20:09:48

[SOLVED] KDE - Manual sleep works perfectly but auto sleep is broken

#2 2025-10-28 20:37:17

Re: [SOLVED] KDE - Manual sleep works perfectly but auto sleep is broken

#3 2025-10-29 08:49:05

Re: [SOLVED] KDE - Manual sleep works perfectly but auto sleep is broken

#4 2025-10-29 09:25:38

Re: [SOLVED] KDE - Manual sleep works perfectly but auto sleep is broken

#5 2025-10-29 09:47:41

Re: [SOLVED] KDE - Manual sleep works perfectly but auto sleep is broken

#6 2025-10-29 22:42:05

Re: [SOLVED] KDE - Manual sleep works perfectly but auto sleep is broken

#7 2025-10-29 23:50:12

Re: [SOLVED] KDE - Manual sleep works perfectly but auto sleep is broken

#8 2025-10-30 00:25:11

Re: [SOLVED] KDE - Manual sleep works perfectly but auto sleep is broken

#9 2025-10-30 02:19:03

Re: [SOLVED] KDE - Manual sleep works perfectly but auto sleep is broken

#10 2025-10-30 08:46:14

Re: [SOLVED] KDE - Manual sleep works perfectly but auto sleep is broken

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