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Kde plasma freezes unexpectedly

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Kde plasma freezes unexpectedly

Fri Mar 03, 2023 9:17 am
Hi,

I have Kubuntu 22.04.2 LTS. Last few weeks KDE started to 'freeze' occasionally. Is this a known issue? Is there any way how I can gracefully close/restart just the UI from terminal?
But most important, what should I check to collect some usefull logs or details that could help to determine the cause of the problem?

Detailed description:
KDE just gets stuck and I can not do anything in the graphical UI. It seems that this usually happens when i switch desktops or even windows on the same desktop (but I cannot reproduce). I can move the mouse cursor, the music is still playing in the background (clementine - and I can control it via keyboards shortcuts), I can log in to the console using Ctrl+Alt+F1, I can log in via SSH... But I can not control KDE anymore - I can not move windows, switches desktops, close windows, opening apps or anyting similar. Once this happened during skype call and the call was not interrupted and i was able to communicate.
This started to happen only few weeks ago, it hasn't been happening before. I haven't installed any new hardware lately.

Technical details that might be relevant:
Code: Select all
root:~# cat /etc/issue                                                                                                                 
Ubuntu 22.04.2 LTS \n \l
                                                                   
root:~# uname -a                                                                                                                       
Linux ryzen 5.19.0-32-generic #33~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Jan 30 17:03:34 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
root:~#                                                                                                                               
root:~# kf5-config --version         
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'                                                                                                                                                                                                   
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'                                                                                                                                                                                                   
Qt: 5.15.3                                                                                                                                                                                                                                                                   
KDE Frameworks: 5.92.0                                                                                                                                                                                                                                                       
kf5-config: 1.0                                                                                                                       
root:~#                         
root:~# lshw -c display                                                                                                                 
  *-display                                                                                                                           
       description: VGA compatible controller
       product: Navi 14 [Radeon RX 5500/5500M / Pro 5500M]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0     
       bus info: pci@0000:0d:00.0
       logical name: /dev/fb0
       version: c5     
       width: 64 bits                                                                                                                                                                                                                                                         
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom fb                                                       
       configuration: depth=32 driver=amdgpu latency=0 resolution=1920,1080
       resources: irq:144 memory:d0000000-dfffffff memory:e0000000-e01fffff ioport:f000(size=256) memory:fcd00000-fcd7ffff memory:c0000-dffff
root:~#                 
root:~# lshw -c processor                                                                                                               
  *-cpu                                                                                                                               
       description: CPU             
       product: AMD Ryzen 9 3950X 16-Core Processor
       vendor: Advanced Micro Devices [AMD]
       physical id: 11   
       bus info: cpu@0     
       version: 23.113.0
       serial: Unknown 
       slot: AM4               
       size: 2199MHz
       capacity: 4761MHz                                                                                                               
       width: 64 bits                                         
       clock: 100MHz         
       capabilities: lm fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pc
lmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate
 ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale
 vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es cpufreq
       configuration: cores=16 enabledcores=16 microcode=141561889 threads=32

root:~# lsmod | grep -i amd
edac_mce_amd           36864  0
kvm_amd               167936  0
kvm                  1130496  1 kvm_amd
ccp                   110592  1 kvm_amd
amdgpu              11300864  170
iommu_v2               24576  1 amdgpu
gpu_sched              49152  1 amdgpu
drm_ttm_helper         16384  1 amdgpu
ttm                    98304  2 amdgpu,drm_ttm_helper
drm_display_helper    184320  1 amdgpu
drm_kms_helper        200704  4 drm_display_helper,amdgpu
drm                   581632  22 gpu_sched,drm_kms_helper,drm_display_helper,amdgpu,drm_ttm_helper,ttm
i2c_algo_bit           16384  2 igb,amdgpu


I have 128GB of memory overclocked to 3600MHZ (but i have it like this for 3 years without an issue). Also memtest seems ok (
Code: Select all
memtester 1G 10
).

Thanks for any advice


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