Log spam an wrong scaling when trying to set a specific scale

[LelouBil]

Hello, I just started to use way-displays with Hyprland and came accross the following problem:

Here is my display information (from hyprctl monitors) after launching way-displays

Monitor eDP-1 (ID 0):
	2560x1600@165.00000 at 0x0
	description: BOE 0x0BC9
	make: BOE
	model: 0x0BC9
	serial: 
	active workspace: 2 (2)
	special workspace: 0 ()
	reserved: 0 108 0 0
	scale: 2
	transform: 0
	focused: yes
	dpmsStatus: 1
	vrr: true
	solitary: 0
	activelyTearing: false
	directScanoutTo: 0
	disabled: false
	currentFormat: XRGB8888
	mirrorOf: none
	availableModes: 2560x1600@165.00Hz 2560x1600@60.00Hz 1920x1200@165.00Hz 1920x1080@165.00Hz 1600x1200@165.00Hz 1680x1050@165.00Hz 1280x1024@165.00Hz 1440x900@165.00Hz 1280x800@165.00Hz 1280x720@165.00Hz 1024x768@165.00Hz 800x600@165.00Hz 640x480@165.00Hz 

However, a scale of 2 is too big, so I tried to set the same scale as I have configured in Hyprland : 1.6

When running way-displays -s SCALE eDP-1 1.6 the way-displays log file (and the output of the command I just ran) spams this endlessly.

eDP-1 Changing:
  from:
    scale:     1.500 (1.958)
    size:      1707x1067
    position:  0,0
    mode:      2560x1600@165Hz (165,000mHz) (preferred)
    VRR:       on
  to:
    scale:     1.625

Changes successful

Moreover, Hyprland is refusing this scale because it is not a clean divisor of my resolution, and prints a warning message on my screen saying to put the scale to 1.6 precisely.

So, why does way-displays not use the number I gave it precisely, and why does this result in log spam until I change the scale back again ?

[alex-courtis]

Thanks for reporting. This strict behaviour is new.

It seems that we round scales to 1/8 to work around multi monitor issues arising from unavoidable wayland rounding #138

It looks like this issue should be reproducible.