Border colors not rendered when sdrBrightness or sdrSaturation != 1.0

[rrobe53]

Bug Description

Window border colors are not rendered when either sdrBrightness or sdrSaturation on a monitor is set to any value other than 1.0. Either value being non-1.0 triggers the issue independently. The border space is allocated by the layout engine (windows are offset correctly), but no color is painted in the border area. Removing the sdrbrightness/sdrsaturation parameters (or setting both to 1.0) immediately restores border rendering.

This is a regression from 0.54.x where borders rendered correctly regardless of SDR brightness/saturation values.

How to reproduce

1. Use a monitor with HDR support and color management active
2. Include either sdrbrightness or sdrsaturation with a non-1.0 value in the monitor config. Verified independently with both:

   # Broken -- non-1.0 sdrbrightness only
   monitor=desc:...,3820x2160@240,0x0,1,bitdepth,10,vrr,1,cm,hdr,sdrbrightness,1.2,sdrsaturation,1
   
   # Also broken -- non-1.0 sdrsaturation only
   monitor=desc:...,3820x2160@240,0x0,1,bitdepth,10,vrr,1,cm,hdr,sdrbrightness,1,sdrsaturation,1.1
   

3. Window borders disappear entirely
4. Remove the sdrbrightness/sdrsaturation parameters or set both to 1.0 -- borders return:

   # Working -- no sdr adjustments
   monitor=desc:...,3820x2160@240,0x0,1,bitdepth,10,vrr,1,cm,hdr
   

Either sdrbrightness or sdrsaturation being non-1.0 is sufficient to reproduce on its own. Both must be 1.0 (or absent) for borders to render.

Expected behavior

Border colors should render regardless of SDR brightness/saturation values.

Observed behavior

Border space is allocated (window position is offset by border_size), but no color is drawn. This affects all border configurations: gradients, solid colors, rgb(), rgba(), any border_size, active and inactive borders. The border area appears as empty/transparent space.

Additional context

• Discovered by comparing against a second machine running the same Hyprland config on an SDR-only display, where borders rendered correctly. This led to investigating HDR-related settings on the affected machine, which narrowed the cause to the sdrBrightness/sdrSaturation values.
• May be related to Fix decoration colors with linear FP16 #14361 which moved decoration color math to linear FP16. The SDR brightness/saturation adjustment in the CM pipeline may be breaking border decoration color rendering specifically.
• Shadows, gaps, rounding, blur, and all other decorations render correctly -- only border color fill is affected.
• Tested and ruled out: FP16 toggle (render:use_fp16), damage tracking, window opacity, rounding, floating/tiled, window rules, plugins, animations, glow, shadow interaction, border_part_of_window, rgb() vs rgba() format, config errors (none reported).

System Info

Hyprland 0.55.0, commit af923e30d1d24f1f4a4f5cb8308065173c1d9539

GPU: NVIDIA RTX 4090 (AD102), driver 595.71.05 (open kernel module)
Monitor: ASUS PG32UCDM, 3840x2160@240Hz, HDR, XBGR2101010
OS: Arch Linux, kernel 7.0.6-1-cachyos

[Aciz]

For me, sdrbrightness/saturation are not what trigger this, it's simply enabling HDR at all that causes the borders to not render. Setting both to 1.0 does not bring back borders, only disabling HDR does.

[rrobe53]

Commenting out HDR fixes mine too because it takes out sdrbrightness and sdrsaturation from the equation. Yours doesn't fix when you comment those two lines out of your config?

sdrbrightness = 1.25,
	sdrsaturation = 1.05,

Here's my hyprctl monitors

Monitor HDMI-A-1 (ID 0):
	3840x2160@240.01601 at 0x0
	description: ASUSTek COMPUTER INC PG32UCDM S7LMQS125482
	make: ASUSTek COMPUTER INC
	model: PG32UCDM
	physical size (mm): 700x400
	serial: S7LMQS125482
	active workspace: 1 (1)
	special workspace: 0 ()
	reserved: 0 30 0 0
	scale: 1.00
	transform: 0
	focused: yes
	dpmsStatus: 1
	vrr: true
	solitary: 0
	solitaryBlockedBy: windowed mode,missing candidate
	activelyTearing: false
	tearingBlockedBy: next frame is not torn,user settings,missing candidate
	directScanoutTo: 0
	directScanoutBlockedBy: user settings,missing candidate
	disabled: false
	currentFormat: XBGR2101010
	mirrorOf: none
	availableModes: 3840x2160@60.00Hz 3840x2160@240.02Hz 3840x2160@119.88Hz 3840x2160@100.00Hz 3840x2160@100.00Hz 3840x2160@59.94Hz 3840x2160@50.00Hz 3840x2160@29.97Hz 3840x2160@25.00Hz 3840x2160@23.98Hz 2560x1440@239.97Hz 2560x1440@120.00Hz 2560x1440@59.95Hz 1920x1080@240.00Hz 1920x1080@119.88Hz 1920x1080@100.00Hz 1920x1080@60.00Hz 1920x1080@59.94Hz 1920x1080@50.00Hz 1920x1080@29.97Hz 1920x1080@25.00Hz 1920x1080@23.98Hz 1600x1200@60.00Hz 1280x1024@60.02Hz 1280x960@60.00Hz 1280x720@60.00Hz 1280x720@59.94Hz 1280x720@50.00Hz 1024x768@75.03Hz 1024x768@60.00Hz 800x600@75.00Hz 800x600@60.32Hz 720x576@50.00Hz 720x480@59.94Hz 640x480@75.00Hz 640x480@59.94Hz 640x480@59.93Hz 
	colorManagementPreset: hdredid
	sdrBrightness: 1.20
	sdrSaturation: 1.00
	sdrMinLuminance: 0.20
	sdrMaxLuminance: 80
	hardwareCursorsInUse: false

[Aciz]

Nope, commenting them out with HDR enabled:

❯ hyprctl monitors
Monitor DP-1 (ID 0):
	2560x1440@240.00101 at 0x0
	description: AOC Q27G4ZDR RK2RCJA009472
	make: AOC
	model: Q27G4ZDR
	physical size (mm): 590x330
	serial: RK2RCJA009472
	active workspace: 4 (4)
	special workspace: 0 ()
	reserved: 0 30 0 0
	scale: 1.00
	transform: 0
	focused: yes
	dpmsStatus: 1
	vrr: false
	solitary: 0
	solitaryBlockedBy: windowed mode,missing candidate
	activelyTearing: false
	tearingBlockedBy: next frame is not torn,missing candidate
	directScanoutTo: 0
	directScanoutBlockedBy: windowed mode,missing candidate
	disabled: false
	currentFormat: XBGR2101010
	mirrorOf: none
	availableModes: 2560x1440@60.00Hz 2560x1440@240.00Hz 2560x1440@200.00Hz 2560x1440@165.00Hz 2560x1440@144.00Hz 2560x1440@120.00Hz 2560x1440@100.00Hz 1920x1080@119.88Hz 1920x1080@60.00Hz 1920x1080@59.94Hz 1920x1080@50.00Hz 1280x1024@75.03Hz 1280x1024@60.02Hz 1280x720@59.94Hz 1280x720@50.00Hz 1024x768@75.03Hz 1024x768@70.07Hz 1024x768@60.00Hz 800x600@119.97Hz 800x600@99.66Hz 800x600@75.00Hz 800x600@72.19Hz 800x600@60.32Hz 800x600@56.25Hz 720x576@50.00Hz 720x480@59.94Hz 640x480@119.52Hz 640x480@99.77Hz 640x480@75.00Hz 640x480@72.81Hz 640x480@59.94Hz 640x480@59.93Hz 
	colorManagementPreset: hdr
	sdrBrightness: 1.00
	sdrSaturation: 1.00
	sdrMinLuminance: 0.00
	sdrMaxLuminance: 200
	hardwareCursorsInUse: true

Still no borders are drawn.

[rrobe53]

Apparently sdr min and max luminance does it too. I didn't have those in my config but tested just now and any of those not being default flips it too.

[Aciz]

Ah, you're right, commenting those out brings the borders back for me too.

[L4D15]

I'm having this bug too. sdrbrightness and sdrsaturation can appear in the config, but as soon as they have something different than 1.0, border rendering and blur break for me. The same goes for sdr_min_luminance and sdr_max_luminance with any value I set for them.

I've commented those parameters for now, but some apps (like Discord) are very dim and hard to read right now.

hl.monitor({
    output = "HDMI-A-1",
    mode = "3840x2160@239.99",
    position = "auto",
    scale = "1.5",
    bitdepth = 10,
    --sdrbrightness = 1.0,
    --sdrsaturation = 1.0,
    vrr = 1,
    cm = "hdr",
    supports_hdr = 1,
    --sdr_min_luminance = 0.0,
    --sdr_max_luminance = 150,
    min_luminance = 0.0,
    max_luminance = 650,
    max_avg_luminance = 250,
})

[Woofson]

I am experiencing the same, blur and border are gone until I remove from config sdrbrightness, sdrsaturation, sdr_min_luminance and sdr_max_luminance. CM is hdr, if I set it to wide or auto the border colors and blur are rendered. I live without borders and blur for now.

[nulliousp]

I am having the same issues aswell, with blur, border and shadow not working with hdr enabled, however my background also goes black after a few seconds of being out of focus.

[Zennwah]

For me it's sdr_max_luminance that causes it.
Edit: sdrbrightness and sdrsaturation also just break colors now.

[atesbalci]

I managed to fix the blur by adding render:use_shader_blur_blend = 1 to my config. The border colors still do not work with HDR though

[Zennwah]

I sadly had to downgrade to the previous version. Colors with HDR enabled are really all over the place on 0.55. For example my cursor should be just blue from the catppuccin pallette, instead it's either oversaturated into deep sky blue or completely white depending on sdr values.

[michaelaguiar]

Same issue here with an almost identical setup, except a different monitor (LG C3 42"). Borders / blur not working with cm = "hdr", but if I comment out sdr_max_luminance and sdr_min_luminance the border and blur are back, but the screen is super faded and looks dark and dirty.

Here is my monitor config:

hl.monitor({
    output = "HDMI-A-1",
    mode = "3840x2160@119.88",
    position = "auto",
    scale = 1.0,
    bitdepth = 10,
    cm = "hdr",

    -- SDR Content
    sdr_max_luminance = 250,
    sdr_min_luminance = 0.0,

    -- HDR Hardware Limits
    max_luminance = 800,
    min_luminance = 0.0,
})

and render block:

hl.config({
    render = {
        direct_scanout = 2,
    }
})

I assume we may have to just wait for a patch (or submit a PR with the patch). Also if anyone notices any improvements I can make to my monitor config (or a decent way to capture screenshots in HDR), let me know!

[DannyKriv]

I have noticed that if I disable, sdrbrightness, sdrsaturation, sdr_min_luminance, and sdr_max_luminance I get the borders to display color, but the display looks wrong if I don't have all these configurations enabled.

Example config for Samsung Odyssey G60SD:

hl.monitor({
output = "DP-1",
mode = "2560x1440@360",
position = "0x0",
scale = 1,
vrr = 1,
bitdepth = 10,
cm = "hdr",
--sdrbrightness = 1.5,
--sdrsaturation = 1.2,
sdr_eotf = "srgb",
--sdr_min_luminance = 0.005,
--sdr_max_luminance = 250,
min_luminance = 0,
max_luminance = 500,
max_avg_luminance = 200
})

[fxzzi]

fade out also seems to be missing the second I add sdr_max_luminance = 203, to my config

[fxzzi]

@vaxerski 21 upvotes, HDR is royally cooked right now

[UjinT34]

Try #14574

[fxzzi]

blur is also borked, so is window/layer fade out (snapshot)
are these not related?

[DannyKriv]

I don't know if this is just isolated to me, but I've noticed that HDR in 0.55 is just fundamentally broken in comparison to the last version of 0.54. Not only do the borders not show up, but after rolling back I noticed color rendering in general was significantly better on 0.54. Also I've noticed on 0.55 that I experience my monitor flickering on and off, and artifacting in certain applications such as chrome or any gnome app that has led to me rolling back with none of the issues showing up again.

[fxzzi]

In terms of colour rendering in HDR, can you elaborate more into what you're seeing? By any chance is HDR stuff being slightly tinted blue / green for you?

The artifacting in apps, is that only when they're in fullscreen, or overall?

[DannyKriv]

I'll attach a photo from my phone camera from the two versions of hyprland to try to show a difference with a photo I've taken and am super familiar with. It's not super obvious in the photos, but to my eye it seems to be a lack of magenta or reds. The 0.54 version has a purple border what the latest at the time of me taking of the picture does not for reasons relevant to the thread. Another thing that I noticed was that there a radical level of difference in terms of how bright the monitor is with it being significantly dimmer in 0.55 if values from the 0.54 config are moved over. This does not really show in the photo unfortunately but trust me its there.

The artifacting happens regardless.

0.54 config:
monitorv2 {
output = DP-1
mode = 2560x1440@360
position = 0x0
scale = 1
vrr = 1
bitdepth = 10
cm = hdr
sdrbrightness = 1.2
sdrsaturation = 1.0
sdr_eotf = srgb
sdr_min_luminance = 0.0005
sdr_max_luminance = 100
}

0.55 config:
hl.monitor({
output = "DP-1",
mode = "2560x1440@360",
position = "0x0",
scale = 1,
vrr = 1,
bitdepth = 10,
cm = "hdr",
sdrbrightness = 1.2,
sdrsaturation = 1.0,
sdr_eotf = "srgb",
sdr_min_luminance = 0.0005,
sdr_max_luminance = 100,
})

[DannyKriv]

Seems with the latest release most of the issues were fixed besides brightness, but that can be fixed with setting sdr_min_luminance, sdr_max_luminance, min_luminance, max_luminance, and max_avg_luminance till it looks proper. Further testing will be needed for the flickering issue.

[fxzzi]

border colours are fixed in #14574
blur and fade out anims are fixed in #14584

[atesbalci]

As I already mentioned above, render:use_shader_blur_blend = 1 fixes the blur

[michaelaguiar]

use_shader_blur_blend is better, but not perfect. For example, If I have blur applied to my special workspace, it doesn't work even with the use_shader_blur_blend.

It does appear to properly blur my application windows though.

hl.config({
    decoration = {
        blur = {
            special = true
        }    
    }
})

[atesbalci]

Yeah, the opacity set by the config files is also quite wonky. It only seems to fix the application based blur, apologies for the confusion

[MarcusKulik]

blur is not entirely fixed for me.
use_shader_blur_blend fixes blur on my main HDR monitor, but breaks blur on my side non HDR monitors. The main monitor is in landscape and the sides are in portrait. The blured bg on the side monitors is stretched and smeared. The fix also causes waybar flickering on the side monitors.
blur results:

without a window over it:

[atesbalci]

Nice catch, just checked and my non-hdr secondary monitor looks the same with a window using blur. Luckily for me, I don't really use my secondary with blurred windows

[Manix80]

The borders and blur effects are back with: use_shader_blur_blend = true, but I no longer see any animations when I exit an application.

hdr_capture.mp4

[fxzzi]

... #14437 (comment)

[GOLD875379]

My window borders do not full being transparent or without color but are flickering with and without color. Interacting with the screen make they appear and/or dissapear. My screen become black too but less frequent.
(I am not native english, sorry if bad explained)

Edit: (add my config)
hl.monitor({
output = "DP-2",
mode = "2560x1440@165",
position = "0x0",
scale = 1.0,
transform = 1,
bitdepth = 10,
cm = "hdredid",
sdr_eotf = "gamma22",
sdrbrightness = 1.15,
sdrsaturation = 1.20,
supports_wide_color = 1,
supports_hdr = 1,
sdr_min_luminance = 0.002,
sdr_max_luminance = 220,
min_luminance = -1,
max_luminance = -1,
max_avg_luminance = -1,
-- icc = "AW2724DM",
})

hl.config({
render = {
send_content_type = true,
cm_enabled = true,
cm_sdr_eotf = "gamma22",
cm_auto_hdr = 0,
direct_scanout = 0,
non_shader_cm = 0,
use_fp16 = 0,
keep_unmodified_copy = 2,
},
})