[System] Problems after screen sleep

[Jenske]

Since several weeks -- I think since I upgraded from 24.10 to 25.04 -- when computer goes in sleep, it takes ages to resume.

• I can no longer wake up the computer with a key stroke, but that's not the biggest problem.
• I have to click the startup button of my dekstop pc, after which it takes several tens of seconds before the screen turns black. Then the screen seems to restart (I see the screen on/off/standby light turn from white to orange) and it takes at least several tens of seconds to see the login with password.
• From then on it works, but ... in the taskbar a popup appears, telling me the KWin manager has been restarted.

What's the matter?
What should I best restart?


My system:
Operating System: Kubuntu 25.04
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.3
Kernel Version: 6.14.0-15-generic (64-bit)
Graphics Platform: X11
Processors: 24 × 13th Gen Intel® Core™ i7-13700KF
Memory: 31.2 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 3060 (discreet)
Manufacturer: Micro-Star International Co., Ltd.
Product Name: MS-7D99
System Version: 1.0

[Virginio Miranda]

Take a look in swap memory.

I have been testing 25.04 version ( my daily usage is 24.04 ) and had exactly the same problem as you. My system run 24/7 and i almost do not use swap memory ( It's defined as a 512 MB and the swappiness is 10 ). My solution was the same in 24.04: disable suspend.