Lxqt-panel high CPU usage

Ask Fedora
,
1

lxqt-panel high CPU usage
almost 70%

Look:
$ top |head -n15

top - 00:47:27 up 2 min,  1 user,  load average: 1,21, 0,55, 0,21
Tasks: 227 total,   2 running, 225 sleeping,   0 stopped,   0 zombie
%Cpu(s): 25,0 us, 14,7 sy,  0,0 ni, 58,8 id,  0,0 wa,  0,0 hi,  1,5 si,  0,0 st
MiB Mem :   7682,5 total,   6050,1 free,    560,7 used,   1071,8 buff/cache
MiB Swap:   7682,0 total,   7682,0 free,      0,0 used.   6789,5 avail Mem 

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND                                           
   1383 luda      20   0 1472052 130700  78972 R  68,8   1,7   0:48.28 lxqt-panel                                        
   1231 luda      20   0 1099400 101888  73216 S  31,2   1,3   0:22.74 Xorg                                              
   1334 luda      20   0  473524  19624  15104 S  12,5   0,2   0:07.57 openbox                                           
   1661 luda      20   0  920212  90260  75392 S   6,2   1,1   0:00.42 qterminal                                         
      1 root      20   0  218524  26624  10584 S   0,0   0,3   0:01.73 systemd                                           
      2 root      20   0       0      0      0 S   0,0   0,0   0:00.00 kthreadd                                          
      3 root       0 -20       0      0      0 I   0,0   0,0   0:00.00 rcu_gp                                            
      4 root       0 -20       0      0      0 I   0,0   0,0   0:00.00 rcu_par_gp

This happens when i set GlobalScaling to 1.5

Nothing unusual on the panel

Screen-2023-07-24_00-58-41
Screen-2023-07-24_00-58-411920×82 67.2 KB

What do I wrong?

2

Does that situation change when you return the scaling to 100%?

I suspect the global scaling may be a factor, especially if one is not using hardware acceleration on the GPU.

3

When I return the scaling to 100% CPU-load = 0

$ inxi -C

CPU:
  Info: dual core model: Intel Core i7-7600U bits: 64 type: MT MCP cache:
    L2: 512 KiB
  Speed (MHz): avg: 3702 min/max: 400/3900 cores: 1: 3700 2: 3703 3: 3700
    4: 3706

$ inxi -G

МGraphics:
  Device-1: Intel HD Graphics 620 driver: i915 v: kernel
  Device-2: Realtek Integrated Webcam_HD driver: uvcvideo type: USB
  Display: x11 server: X.Org v: 1.20.14 driver: X: loaded: modesetting
    unloaded: fbdev,vesa dri: iris gpu: i915 resolution: 1920x1080~60Hz
  API: OpenGL v: 4.6 Mesa 23.1.3 renderer: Mesa Intel HD Graphics 620 (KBL
    GT2)

Is it not enough for scaling to >100% ?
Need super power graphic card?

sadly :frowning:

4

I am not 100% certain but seem to remember that by default the base install (at least with workstation) only allows scaling of 100% & 200%, with no fractional scaling.
On my system with a fairly high power GPU I can get 100/125/150/175/200% but only when I set it to 4k resolution. That also only works with using hardware acceleration on the GPU. With hardware acceleration disabled the CPU becomes overloaded very quickly.

Since that appears to be an integrated GPU and is also only on the 7th gen processors, then it will always load the CPU when high graphics loads are encountered.

5

200% also loads the system.

No way out…
I will stay at 100% and will adjust the size of fonts, icons, etc