Comment 8 for bug 1814125

disabled nvidia gpu in nvidia-settings (and rebooted)
 without any application : OK
 with just a firefox empty private browsing window : OK
 with a normal firefox (many tabs & plugins) : OK
 many apps running : OK
enabling nvidia GPU, rebooted
 without any application : KO

computer is calm, doing a manual lock lead to imediate fan blowing. unlocking and fan calm down.

extract from my script logs (I added CPU freq fyi):

cpu MHz : 700.142
cpu MHz : 700.025
cpu MHz : 700.346
cpu MHz : 700.285
cpu MHz : 700.037
cpu MHz : 700.094
cpu MHz : 700.109
cpu MHz : 700.109
top - 12:01:18 up 54 min, 1 user, load average: 0.16, 0.46, 0.67
Tasks: 263 total, 1 running, 262 sleeping, 0 stopped, 0 zombie
%Cpu(s): 1.5 us, 1.5 sy, 0.0 ni, 97.1 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7860.6 total, 5831.8 free, 963.5 used, 1065.4 buff/cache
MiB Swap: 512.0 total, 512.0 free, 0.0 used. 6620.2 avail Mem
  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
  245 root -51 0 0 0 0 S 6.2 0.0 0:04.87 irq/129-nvidia
 2568 laulau 20 0 375224 87192 49688 S 6.2 1.1 0:20.95 Xorg
 2772 laulau 20 0 3265100 286588 97372 S 6.2 3.6 27:57.77 gnome-shell
 6954 laulau 20 0 26296 3764 3140 R 6.2 0.0 0:00.02 top
    1 root 20 0 195328 9612 6764 S 0.0 0.1 0:03.46 systemd
    2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd

cpu MHz : 3400.000
cpu MHz : 3400.341
cpu MHz : 3401.565
cpu MHz : 3401.177
cpu MHz : 3399.907
cpu MHz : 3400.164
cpu MHz : 3403.125
cpu MHz : 3400.692
top - 12:01:28 up 54 min, 1 user, load average: 0.29, 0.48, 0.67
Tasks: 262 total, 2 running, 260 sleeping, 0 stopped, 0 zombie
%Cpu(s): 4.0 us, 8.8 sy, 0.0 ni, 87.2 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7860.6 total, 5830.9 free, 964.3 used, 1065.4 buff/cache
MiB Swap: 512.0 total, 512.0 free, 0.0 used. 6619.3 avail Mem

  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
 2772 laulau 20 0 3265100 286948 97372 R 93.8 3.6 28:06.30 gnome-shell
    1 root 20 0 195328 9612 6764 S 0.0 0.1 0:03.46 systemd
    2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd

so the problem is between nvidia and gnome-shell on my configuration. and the fact that I want to display seconds in the top bar !