kde screen saver issue

[maximan]

After my computer enters the power saving mode, when I want to turn it back on, the screen appears, but there is a crash for 15 to 20 seconds. then it works fine.

[Schwarzer Kater]

Welcome.

Hardware info? Like laptop or desktop, CPU, GPU, …
Software info? Like kernel version, KDE Plasma version (with or without Kubuntu Backports), which programs are running when the crash occurs, …

[maximan]

amd 5600
asus b350 prime
6700xt
kernel 6.2.0-25-generic
kde p : 5.27.4
"which programs are running when the crash occurs, …" dosnt matter which program use.
When I exit power save mode, nothing responds. after a while (15-20 seconds) the computer continues to run.

[Schwarzer Kater]

So it seems to be
a desktop computer (AMD Ryzen 5 5600 CPU / AMD Radeon RX 6700 XT GPU / ASUS motherboard - ROG Strix B350-I Gaming?)
with Kubuntu 23.04 and
without the Kubuntu Backports and
with the 6.2.0-25-generic kernel.

There a several things you can do (and there are probably more to find if you search this forum):

Take a look at e.g. journalctl -a -e in Konsole afterwards, scroll up and see if you can spot some useful information according to the crash (and post the relevant part within CODE tags here).
Press [q] to exit.

You could also create another user account to detemine if the culprit is within your /home/$USER …

Does the crash also occur when you boot with another (previous) kernel (chosen from the GRUB boot menu) or from a Kubuntu 23.04 live USB stick - or with a later kernel (e.g. 6.4.x) when you boot from e.g. an openSUSE Tumbleweed live USB stick?

Did you check if there is a firmware update from ASUS for your motherboard that corrects some errors?
Did you check your motherboard's firmware for e.g. ACPI settings?