https://bugs.kde.org/show_bug.cgi?id=507035
Bug ID: 507035
Summary: KDE desktop is unreachable after some time idle
Classification: Plasma
Product: kwin
Version First 6.4.1
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
KDE desktop is unreachable after some time idle
STEPS TO REPRODUCE
With the recent update to Plasma 6.4.x, I started seeing a new problem (not
seen in 6.1.x):
* Laptop is connected to external display via HDMI.
* Laptop lid is closed. Plasma power settings adjusted to ignore lid switch.
* Leave laptop unattended for some time (e.g. overnight)
* Try to wake external display using external keyboard
OBSERVED RESULT
External display does not wake up.
EXPECTED RESULT
External display wakes up. Shows SDDM login prompt.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kernel 6.12.35-1-lts
KDE Plasma Version: 6.4.x
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.1
ADDITIONAL INFORMATION
Laptop is reachable via ssh. Workaround is restarting SDDM via ssh. This
recovers display & shows login screen okay.
I looked inside the journal. First message on attempt to wake via keyboard
shows a kwin error:
* kwin\_wayland\[22936\]: kwin\_xwl: Could not find a matching X RandR
CRTC/output to set as primary for KWin::DrmOutput(0x63655bdc06a0, name="eDP-1",
geometry=QRect(0,0 1920x1080), scale=1)
After this first entry, there's a larger list of failures. Here's the next few
entries:
Jul 09 13:53:38 seranto-009 kwin_wayland[22936]: kwin_xwl: Could not find a
matching X RandR CRTC/output to set as primary for
KWin::DrmOutput(0x63655bdc06a0, name="eDP-1", geometry=QRect(0,0 1920x1080),
scale=1)
Jul 09 13:53:38 seranto-009 kwin_wayland[22936]: kwin_scene_opengl: Could not
delete render time query because no context is current
Jul 09 13:53:39 seranto-009 kded6[23144]: xsettingsd: Reloading configuration
Jul 09 13:53:39 seranto-009 kded6[23144]: xsettingsd: Loaded 16 settings from
/home/james/.config/xsettingsd/xsettingsd.conf
Jul 09 13:53:39 seranto-009 polkit-kde-authentication-agent-1[23163]:
qt.qpa.wayland: There are no outputs - creating placeholder screen
Jul 09 13:53:39 seranto-009 kactivitymanagerd[23155]: qt.qpa.wayland: There are
no outputs - creating placeholder screen
Jul 09 13:53:39 seranto-009 insync[23332]: qt.qpa.wayland: Creating a fake
screen in order for Qt not to crash
Jul 09 13:53:39 seranto-009 kdeconnectd[23262]: 2025-07-09T13:53:39
qt.qpa.wayland: There are no outputs - creating placeholder screen
Jul 09 13:53:39 seranto-009 ksecretd[22885]: qt.qpa.wayland: There are no
outputs - creating placeholder screen
Jul 09 13:53:39 seranto-009 xdg-desktop-portal-kde[23165]: qt.qpa.wayland:
There are no outputs - creating placeholder screen
Jul 09 13:53:39 seranto-009 yakuake[23335]: qt.qpa.wayland: There are no
outputs - creating placeholder screen
Jul 09 13:53:39 seranto-009 konsole[23462]: qt.qpa.wayland: There are no
outputs - creating placeholder screen
Jul 09 13:53:39 seranto-009 kded6[23051]: qt.qpa.wayland: There are no outputs
- creating placeholder screen
Jul 09 13:53:39 seranto-009 systemsettings[23463]: qt.qpa.wayland: There are no
outputs - creating placeholder screen
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