Notably after a resume the backlight control should still be max 255,
e.g. here it is
root@jak-t14-g3:/sys/class/backlight/amdgpu_bl1# grep . * 2>/dev/null
actual_brightness:15
bl_power:0
brightness:15
max_brightness:255
scale:unknown
type:raw
Basically yes it passes -1:
(gdb)
#0 gsd_power_backlight_abs_to_percentage (min=-1, max=-1, value=-1) at
../plugins/power/gpm-common.c:54
__func__ = "gsd_power_backlight_abs_to_percentage"
#1 0x000060bb8f841733 in gsd_backlight_set_brightness_val_async
(backlight=0x60bbaeda21d0 [GsdBacklight], value=<optimized out>,
callback=<optimized out>, user_data=<optimized out>, cancellable=0x0)
at ../plugins/power/gsd-backlight.c:480
task_data = <optimized out>
error = 0x0
task = 0x60bbaeda6200 [GTask]
monitor = <optimized out>
percent = <optimized out>
__func__ = {<optimized out> <repeats 39 times>}
** Tags added: rls-oo-incoming
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https://bugs.launchpad.net/bugs/2081294
Title:
gsd_power_backlight_abs_to_percentage: assertion 'max > min' failed
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