Comment 15 for bug 1861925

As I told I have an other similar laptop with discrete GPU:
Product Name : Aspire A315-41G
With cpu:
model name : AMD Ryzen 5 3500U with Radeon Vega Mobile Gfx

It works.

I'm attaching the fwts output just now...

The command sudo kprobe-perf 'p:dce_abm_set_backlight_level_pwm $arg1 $arg2 $arg3 $arg4 $arg5 '
Tracing kprobe dce_abm_set_backlight_level_pwm. Ctrl-C to end.
 mate-power-back-9415 [000] ...1 2421.242531: dce_abm_set_backlight_level_pwm: (dce_abm_set_backlight_level_pwm+0x0/0x440 [amdgpu]) arg1=0xffff8dbd577bfd00 arg2=0x2117 arg3=0x0 arg4=0x1 arg5=0x1
 mate-power-back-9421 [003] ...1 2422.216410: dce_abm_set_backlight_level_pwm: (dce_abm_set_backlight_level_pwm+0x0/0x440 [amdgpu]) arg1=0xffff8dbd577bfd00 arg2=0x2c19 arg3=0x0 arg4=0x1 arg5=0x1
 mate-power-back-9426 [004] ...1 2423.080217: dce_abm_set_backlight_level_pwm: (dce_abm_set_backlight_level_pwm+0x0/0x440 [amdgpu]) arg1=0xffff8dbd577bfd00 arg2=0x371b arg3=0x0 arg4=0x1 arg5=0x1
 mate-power-back-9431 [005] ...1 2424.162837: dce_abm_set_backlight_level_pwm: (dce_abm_set_backlight_level_pwm+0x0/0x440 [amdgpu]) arg1=0xffff8dbd577bfd00 arg2=0x421d arg3=0x0 arg4=0x1 arg5=0x1
 mate-power-back-9436 [002] ...1 2424.986163: dce_abm_set_backlight_level_pwm: (dce_abm_set_backlight_level_pwm+0x0/0x440 [amdgpu]) arg1=0xffff8dbd577bfd00 arg2=0x371b arg3=0x0 arg4=0x1 arg5=0x1
 mate-power-back-9441 [004] ...1 2425.816147: dce_abm_set_backlight_level_pwm: (dce_abm_set_backlight_level_pwm+0x0/0x440 [amdgpu]) arg1=0xffff8dbd577bfd00 arg2=0x2c19 arg3=0x0 arg4=0x1 arg5=0x1
 mate-power-back-9446 [000] ...1 2426.372179: dce_abm_set_backlight_level_pwm: (dce_abm_set_backlight_level_pwm+0x0/0x440 [amdgpu]) arg1=0xffff8dbd577bfd00 arg2=0x2117 arg3=0x0 arg4=0x1 arg5=0x1
 mate-power-back-9451 [001] ...1 2426.897445: dce_abm_set_backlight_level_pwm: (dce_abm_set_backlight_level_pwm+0x0/0x440 [amdgpu]) arg1=0xffff8dbd577bfd00 arg2=0x1616 arg3=0x0 arg4=0x1 arg5=0x1

with arg5=0x1...