Cant return from inactivity

Issues & Assistance
1

I recently installed Cachy OS and quite impressed by performance of system. But sadly I catch some problem… Initially i used sleep mode by default and after i don’t come back for more than half an hour - exiting sleep mode showed just black screen when i try to do something. After that i decided to turn off sleep mode and switch to screen lock. In this case after half an hour or more of inactivity, password input is shown and can be typed, but after pressing enter nothing happens. BUT sometime if I waiting long enough, you can still enter back. And i noticed messages after this:

oct 23 22:54:19 cachyos-pc kernel: kscreenlocker_g[68938]: segfault at 10 ip 000075c9287af47e sp 00007ffccf3bbe20 error 4 in libQt6Qml.so.6.8.0[1af47e,75c9286a7000+3dd000] likely on CPU 8 (core 0, socket 0)
oct 23 22:54:19 cachyos-pc kernel: Code: ec 10 48 8b 02 4c 8b 66 08 48 89 fd 64 48 8b 1c 25 28 00 00 00 48 89 5c 24 08 48 89 f3 48 85 c8 75 6a 48 85 c0 74 65 48 8b 08 <48> 8b 49 10 80 79 0e 00 74 58 49 8d 74 >
oct 23 22:54:19 cachyos-pc kscreenlocker_greet[77215]: The cached device pixel ratio value was stale on window update.  Please file a QTBUG which explains how to reproduce.
oct 23 22:54:20 cachyos-pc kscreenlocker_greet[77215]: pam_systemd_home(kde:auth): New sd-bus connection (system-bus-pam-systemd-home-77215) opened.

My config:

OS: CachyOS Linux x86_64
Host: X670E Steel Legend
Kernel: Linux 6.11.5-2-cachyos
Uptime: 6 hours, 30 mins
Packages: 1354 (pacman)
Shell: fish 3.7.1
Display (LG ULTRAGEAR): 2560x1440 @ 100 Hz (as 1706x960) in 27" [External] [HDR]
DE: KDE Plasma 6.2.2
WM: KWin (Wayland)
WM Theme: Breeze
Theme: Breeze (Dark) [Qt], Breeze-Dark [GTK2], Breeze [GTK3]
Icons: breeze-dark [Qt], breeze-dark [GTK2/3/4]
Font: Noto Sans (10pt) [Qt], Noto Sans (10pt) [GTK2/3/4]
Cursor: breeze (24px)
Terminal: konsole 24.8.2
CPU: AMD Ryzen 7 9700X (16) @ 6.59 GHz
GPU 1: AMD Radeon RX 7900 XTX [Discrete]
GPU 2: AMD Radeon Graphics [Integrated]
Memory: 14.82 GiB / 60.41 GiB (25%)
Swap: 6.00 MiB / 60.41 GiB (0%)
Disk (/): 41.57 GiB / 308.55 GiB (13%) - btrfs
Disk (/mnt/sdb1): 806.18 GiB / 1.82 TiB (43%) - ntfs3
Local IP (enp10s0): 192.168.1.42/24
Locale: ru_RU.UTF-8

2

Yeah this looks like a QT bug, based on that snippet anyway. You can report here.

3

Try the lts kernel. I have been having some serious issues with 6.11 waking from suspend.

4

Same here. Most noticeable the trackpad not working after suspend, it works as expected with the lts kernel.
Actually, if I use the 6.11 kernels after suspend the trackpad won’t work even after a reboot into the lts kernel. I must completely turn of my laptop and boot into the lts kernel for it to work again.

5

What is your hardware? I’ve had some thinkpads that require “psmouse.synaptics_intertouch=0” kernel parameter to function after suspend.

https://wiki.archlinux.org/title/Touchpad_Synaptics