Kwin crashes when external monitor will connect

Hi,

when I’m starting my Lenovo T14 with connected external monitor, Kwin shows the message:

Die Arbeitsflächeneffekte wurden durch eine andere Anwendung ausgesetzt.
Sie können mit Hilfe des Kurzbefehls „Alt+Umschalt+F12“ reaktiviert werden.

It happens also when I have the system already started, and I connect the PC with an external monitor or projector.

In compositor-settings for applications it is not allowed to disable compositing. No changes with different render-settings…

Could the problem cause in different resolutions of the screens?

I don’t want spam the thread with a lot of logs and sysinfo. But I have posted information to another forum (where nobody had a solution for me until now):
manjaro-forum .de/viewtopic.php?f=38&t=3262

Here are the most important information about my system:

inxi -Fz
System:    Kernel: 5.11.6-1-MANJARO x86_64 bits: 64 Desktop: KDE Plasma 5.21.3 Distro: Manjaro Linux 
Machine:   Type: Laptop System: LENOVO product: 20UES00L00 v: ThinkPad T14 Gen 1 serial: <filter> 
           Mobo: LENOVO model: 20UES00L00 serial: <filter> UEFI: LENOVO v: R1BET61W(1.30 ) date: 12/21/2020
Battery:   ID-1: BAT0 charge: 39.4 Wh (78.0%) condition: 50.5/50.5 Wh (100.0%) 
CPU:       Info: 8-Core model: AMD Ryzen 7 PRO 4750U with Radeon Graphics bits: 64 type: MT MCP cache: L2: 4 MiB 
           Speed: 1483 MHz min/max: 1400/1700 MHz Core speeds (MHz): 1: 1483 2: 1397 3: 1502 4: 1629 5: 1472 
           6: 1797 7: 1903 8: 1397 9: 1397 10: 1397 11: 1397 12: 1397 13: 1445 14: 1397 15: 1480 16: 1470 
Graphics:  Device-1: Advanced Micro Devices [AMD/ATI] Renoir driver: amdgpu v: kernel 
           Device-2: Chicony Integrated Camera type: USB driver: uvcvideo 
           Display: x11 server: X.Org 1.20.10 driver: loaded: amdgpu,ati unloaded: modesetting 
           resolution: 2560x1440~60Hz 
           OpenGL: renderer: AMD RENOIR (DRM 3.40.0 5.11.6-1-MANJARO LLVM 11.1.0) v: 4.6 Mesa 20.3.4 
Audio:     Device-1: Advanced Micro Devices [AMD/ATI] driver: snd_hda_intel 
           Device-2: Advanced Micro Devices [AMD] Raven/Raven2/FireFlight/Renoir Audio Processor 
           driver: snd_rn_pci_acp3x 
           Device-3: Advanced Micro Devices [AMD] Family 17h HD Audio driver: snd_hda_intel 
           Device-4: Lenovo ThinkPad Dock USB Audio type: USB driver: hid-generic,snd-usb-audio,usbhid 
           Sound Server-1: ALSA v: k5.11.6-1-MANJARO running: yes 
           Sound Server-2: PulseAudio v: 14.2 running: yes 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169 
           IF: enp2s0f0 state: down mac: <filter> 
           Device-2: Intel Wi-Fi 6 AX200 driver: iwlwifi 
           IF: wlp3s0 state: up mac: <filter> 
           Device-3: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169 
           IF: enp5s0 state: down mac: <filter> 
Bluetooth: Device-1: Intel AX200 Bluetooth type: USB driver: btusb 
           Report: ID: hci0 state: up address: <filter> 
Drives:    Local Storage: total: 968.31 GiB used: 321.39 GiB (33.2%) 
           ID-1: /dev/nvme0n1 vendor: Samsung model: MZVLB1T0HBLR-000L7 size: 953.87 GiB 
           ID-2: /dev/sda type: USB vendor: Toshiba model: TransMemory size: 14.44 GiB 
Partition: ID-1: / size: 100 GiB used: 48.24 GiB (48.2%) fs: btrfs dev: /dev/nvme0n1p2 
           ID-2: /boot/efi size: 511 MiB used: 688 KiB (0.1%) fs: vfat dev: /dev/nvme0n1p4 
           ID-3: /home size: 823.52 GiB used: 272.8 GiB (33.1%) fs: ext4 dev: /dev/nvme0n1p1 
Swap:      ID-1: swap-1 type: partition size: 15.62 GiB used: 0 KiB (0.0%) dev: /dev/nvme0n1p3 
Sensors:   System Temperatures: cpu: 76.1 C mobo: 0.0 C gpu: amdgpu temp: 54.0 C 
           Fan Speeds (RPM): cpu: 3600 
Info:      Processes: 366 Uptime: 20m Memory: 14.93 GiB used: 4.94 GiB (33.1%) Shell: Bash inxi: 3.3.03 

I hope someone of you has any kind of idea what the solution of this problem could be…

Thanks a lot!

No.

Do you get any output on usb dock display output?

I am assuming that you have not updated to latest Bios.

I found some information here
It says that usb-c firmware is buggy.

Can you try 5.10 kernel. Hopefully with latest kernel and updated firmware you should have this issue fixed.

Good luck.

Hi spikerguy,

Do you get any output on usb dock display output?

What do you mean? I can use the external display. But after booting the machine I have to relaunch kwin-effects. It doesn’t matter I’m using HDMI, USB-C or the Docking-Station. When the system is already running, and I disconnect and reconnect the dockingsation (plus external display) kwin DOESN’T crash.

I am assuming that you have not updated to latest Bios.

The BIOS is up to date.

I found some information here

It’s a Displaylink bug. Displaylink works only on Kernel 5.8
I’m using the dockingstation CS18 for DisplayPort for the external display and power.
And the performance of the Ryzen is good. (At least Zenmonitor shows a core-usage up to 4,1 Ghz)

Can you try 5.10 kernel. Hopefully with latest kernel and updated firmware you should have this issue fixed.

I tried different kernels. Unfortunately no one solving of the issue. :frowning:

Could at be an issue in connection to NVME or energy-save-mods?

activate the background contrast in the destkop effect settings. This prevents the crashing of the compositor on my system. how does that work, I don’t know. But it works.

This setting here

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