Sharp Shadow Corner When Blur Enabled (Rounded Corners)

thezuggler · 6 November 2025 15:18

I migrated to Garuda Mokka by following this guide: Release Notes and Migration | Garuda Linux wiki

I love the aesthetic and the rounded corners. However, I noticed that when I enable both the blur and rounded corners, there is a sharp shadow corner behind the rounded corners.

So far, I have tried:

Setting corner radius in Better Blur > Rounded corners
Switching between Blur and Better blur

I have read these posts:

I didn’t have much luck with either.

gabriel@gabriel-garuda in ~
󰛓 ❯ garuda-inxi
System:
Kernel: 6.17.7-zen1-1-zen arch: x86_64 bits: 64 compiler: gcc v: 15.2.1
clocksource: tsc avail: hpet,acpi_pm
parameters: BOOT_IMAGE=/@/boot/vmlinuz-linux-zen
root=UUID=a6030ee9-7d5e-4ec7-a112-83aae9f3397d rw rootflags=subvol=@
vt.default_red=30,243,166,249,137,245,148,186,88,243,166,249,137,245,148,166
vt.default_grn=30,139,227,226,180,194,226,194,91,139,227,226,180,194,226,173
vt.default_blu=46,168,161,175,250,231,213,222,112,168,161,175,250,231,213,200
quiet resume=UUID=493cd425-f238-43b3-aade-988537fc3195 loglevel=3
mem_sleep_default=deep nvidia.NVreg_PreserveVideoMemoryAllocations=1
video=HDMI-A-1:2560x1440x32 video=DP-2:1920x1080x32
Desktop: KDE Plasma v: 6.5.1 tk: Qt v: N/A info: frameworks v: 6.19.0
wm: kwin_wayland vt: 2 dm: SDDM Distro: Garuda base: Arch Linux
Machine:
Type: Desktop Mobo: ASUSTeK model: ROG STRIX X570-E GAMING v: Rev X.0x
serial: <superuser required> part-nu: SKU uuid: <superuser required>
UEFI: American Megatrends v: 2602 date: 08/04/2020
Battery:
ID-1: hidpp_battery_0 charge: 100% condition: N/A volts: 4.23 min: N/A
model: Logitech G Pro Wireless Gaming Mouse type: N/A serial: <filter>
charging: status: full cycles: N/A
CPU:
Info: model: AMD Ryzen 7 3700X bits: 64 type: MT MCP arch: Zen 2 gen: 2
level: v3 note: check built: 2020-22 process: TSMC n7 (7nm)
family: 0x17 (23) model-id: 0x71 (113) stepping: 0 microcode: 0x8701034
Topology: cpus: 1x dies: 1 clusters: 1 cores: 8 threads: 16 tpc: 2
smt: enabled cache: L1: 512 KiB desc: d-8x32 KiB; i-8x32 KiB L2: 4 MiB
desc: 8x512 KiB L3: 32 MiB desc: 2x16 MiB
Speed (MHz): avg: 4100 min/max: 2200/5041 boost: disabled scaling:
driver: acpi-cpufreq governor: schedutil cores: 1: 4100 2: 4100 3: 4100
4: 4100 5: 4100 6: 4100 7: 4100 8: 4100 9: 4100 10: 4100 11: 4100 12: 4100
13: 4100 14: 4100 15: 4100 16: 4100 bogomips: 131199
Flags-basic: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a
ssse3 svm
Vulnerabilities: <filter>
Graphics:
Device-1: NVIDIA AD104 [GeForce RTX 4070] vendor: ASUSTeK driver: nvidia
v: 580.95.05 alternate: nouveau,nvidia_drm non-free: 550-580.xx+
status: current (as of 2025-08) arch: Lovelace code: AD1xx
process: TSMC n4 (5nm) built: 2022+ pcie: gen: 4 speed: 16 GT/s lanes: 16
ports: active: DP-2,HDMI-A-1 empty: DP-1,DP-3 bus-ID: 0b:00.0
chip-ID: 10de:2786 class-ID: 0300
Device-2: Logitech Logitech Webcam C925e driver: snd-usb-audio,uvcvideo
type: USB rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 5-1.1:4
chip-ID: 046d:085b class-ID: 0102 serial: <filter>
Display: wayland server: X.org v: 1.21.1.20 with: Xwayland v: 24.1.9
compositor: kwin_wayland driver: X: loaded: nvidia
unloaded: modesetting,nouveau alternate: fbdev,nv,vesa
gpu: nv_platform,nvidia,nvidia-nvswitch d-rect: 4480x2520 display-ID: 0
Monitor-1: DP-2 pos: bottom-r model: Dell P2419H serial: <filter>
built: 2019 res: mode: 1920x1080 hz: 60 scale: 100% (1) dpi: 93 gamma: 1.2
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Monitor-2: HDMI-A-1 pos: primary,top-left model: Dell S2719DGF
serial: <filter> built: 2019 res: mode: 2560x1440 hz: 144 scale: 100% (1)
dpi: 109 gamma: 1.2 size: 597x336mm (23.5x13.23") diag: 685mm (27")
ratio: 16:9 modes: max: 2560x1440 min: 640x480
API: EGL v: 1.5 hw: drv: nvidia platforms: device: 0 drv: nvidia device: 2
drv: swrast gbm: drv: nvidia surfaceless: drv: nvidia wayland: drv: nvidia
x11: drv: nvidia inactive: device-1
API: OpenGL v: 4.6.0 compat-v: 4.5 vendor: nvidia mesa v: 580.95.05
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memory: 11.71 GiB display-ID: :0.0
API: Vulkan v: 1.4.328 layers: 11 device: 0 type: discrete-gpu
name: NVIDIA GeForce RTX 4070 driver: nvidia v: 580.95.05
device-ID: 10de:2786 surfaces: N/A device: 1 type: cpu name: llvmpipe
(LLVM 21.1.4 256 bits) driver: mesa llvmpipe v: 25.2.6-arch1.1 (LLVM
21.1.4) device-ID: 10005:0000 surfaces: N/A
Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
de: kscreen-console,kscreen-doctor gpu: nvidia-settings,nvidia-smi
wl: wayland-info x11: xdpyinfo, xprop, xrandr
Audio:
Device-1: NVIDIA AD104 High Definition Audio vendor: ASUSTeK
driver: snd_hda_intel v: kernel pcie: gen: 4 speed: 16 GT/s lanes: 16
bus-ID: 0b:00.1 chip-ID: 10de:22bc class-ID: 0403
Device-2: Advanced Micro Devices [AMD] Starship/Matisse HD Audio
vendor: ASUSTeK driver: snd_hda_intel v: kernel pcie: gen: 4 speed: 16 GT/s
lanes: 16 bus-ID: 0d:00.4 chip-ID: 1022:1487 class-ID: 0403
Device-3: Logitech Logitech Webcam C925e driver: snd-usb-audio,uvcvideo
type: USB rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 5-1.1:4
chip-ID: 046d:085b class-ID: 0102 serial: <filter>
Device-4: HP HyperX Cloud Alpha Wireless
driver: cdc_acm,hid-generic,snd-usb-audio,usbhid type: USB rev: 2.0
speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 5-4:3 chip-ID: 03f0:098d
class-ID: 0a00 serial: <filter>
API: ALSA v: k6.17.7-zen1-1-zen status: kernel-api tools: N/A
Server-1: sndiod v: N/A status: off tools: aucat,midicat,sndioctl
Server-2: PipeWire v: 1.4.9 status: active with: 1: pipewire-pulse
status: active 2: wireplumber status: active 3: pipewire-alsa type: plugin
4: pw-jack type: plugin tools: pactl,pw-cat,pw-cli,wpctl
Network:
Device-1: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel pcie: gen: 2
speed: 5 GT/s lanes: 1 bus-ID: 05:00.0 chip-ID: 8086:2723 class-ID: 0280
IF: wlp5s0 state: down mac: <filter>
Device-2: Realtek RTL8125 2.5GbE vendor: ASUSTeK driver: r8169 v: kernel
pcie: gen: 2 speed: 5 GT/s lanes: 1 port: e000 bus-ID: 06:00.0
chip-ID: 10ec:8125 class-ID: 0200
IF: enp6s0 state: down mac: <filter>
Device-3: Intel I211 Gigabit Network vendor: ASUSTeK driver: igb v: kernel
pcie: gen: 1 speed: 2.5 GT/s lanes: 1 port: d000 bus-ID: 07:00.0
chip-ID: 8086:1539 class-ID: 0200
IF: enp7s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Info: services: NetworkManager, smbd, sshd, systemd-timesyncd,
wpa_supplicant
Bluetooth:
Device-1: Intel AX200 Bluetooth driver: btusb v: 0.8 type: USB rev: 2.0
speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 1-6:4 chip-ID: 8087:0029
class-ID: e001
Report: btmgmt ID: hci0 rfk-id: 0 state: up address: <filter> bt-v: 5.2
lmp-v: 11 status: discoverable: no pairing: no class-ID: 6c0104
Drives:
Local Storage: total: 9.55 TiB used: 3.77 TiB (39.4%)
SMART Message: Unable to run smartctl. Root privileges required.
ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Samsung
model: SSD 970 EVO Plus 500GB size: 465.76 GiB block-size: physical: 512 B
logical: 512 B speed: 31.6 Gb/s lanes: 4 tech: SSD serial: <filter>
fw-rev: 2B2QEXM7 temp: 38.9 C scheme: GPT
ID-2: /dev/nvme1n1 maj-min: 259:1 vendor: Western Digital
model: WD BLACK SN850X 2000GB size: 1.82 TiB block-size: physical: 512 B
logical: 512 B speed: 63.2 Gb/s lanes: 4 tech: SSD serial: <filter>
fw-rev: 620361WD temp: 48.9 C scheme: GPT
ID-3: /dev/sda maj-min: 8:0 vendor: Seagate model: ST8000VN0022-2EL112
size: 7.28 TiB block-size: physical: 4096 B logical: 512 B speed: 6.0 Gb/s
tech: HDD rpm: 7200 serial: <filter> fw-rev: SC61 scheme: GPT
Partition:
ID-1: / raw-size: 379.16 GiB size: 379.16 GiB (100.00%)
used: 198.33 GiB (52.3%) fs: btrfs dev: /dev/nvme0n1p2 maj-min: 259:9
ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
used: 476 KiB (0.2%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:8
ID-3: /home raw-size: 379.16 GiB size: 379.16 GiB (100.00%)
used: 198.33 GiB (52.3%) fs: btrfs dev: /dev/nvme0n1p2 maj-min: 259:9
ID-4: /var/log raw-size: 379.16 GiB size: 379.16 GiB (100.00%)
used: 198.33 GiB (52.3%) fs: btrfs dev: /dev/nvme0n1p2 maj-min: 259:9
ID-5: /var/tmp raw-size: 379.16 GiB size: 379.16 GiB (100.00%)
used: 198.33 GiB (52.3%) fs: btrfs dev: /dev/nvme0n1p2 maj-min: 259:9
Swap:
Kernel: swappiness: 133 (default 60) cache-pressure: 100 (default) zswap: no
ID-1: swap-1 type: zram size: 78.45 GiB used: 0 KiB (0.0%) priority: 100
comp: zstd avail: lzo-rle,lzo,lz4,lz4hc,deflate,842 dev: /dev/zram0
ID-2: swap-2 type: partition size: 86.3 GiB used: 0 KiB (0.0%)
priority: -2 dev: /dev/nvme0n1p3 maj-min: 259:10
Sensors:
System Temperatures: cpu: 44.0 C mobo: 39.0 C
Fan Speeds (rpm): N/A
Info:
Memory: total: 80 GiB note: est. available: 78.45 GiB used: 3.83 GiB (4.9%)
Processes: 456 Power: uptime: 0m states: freeze,mem,disk suspend: deep
avail: s2idle wakeups: 0 hibernate: platform avail: shutdown, reboot,
suspend, test_resume image: 31.33 GiB services: org_kde_powerdevil,
power-profiles-daemon, upowerd Init: systemd v: 258 default: graphical
tool: systemctl
Packages: pm: nix-default pkgs: 0 pm: nix-sys pkgs: 0 pm: nix-usr pkgs: 0
pm: pacman pkgs: 1733 libs: 475 tools: octopi,paru Compilers: gcc: 15.2.1
Shell: Bash v: 5.3.3 default: fish v: 4.1.2 running-in: konsole
inxi: 3.3.39
Garuda (2.11.1-1):
System install date:     2024-09-09
Garuda release:          240428
Last full system update: 2025-11-06
Is partially upgraded:   No
Relevant software:       snapper NetworkManager dracut nvidia-utils nvidia-open-dkms garuda-hardware-profile-nvidia garuda-hardware-profile-standard garuda-hardware-profile-standard-x11
Windows dual boot:       Probably (Run as root to verify)
Failed units:
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FGD · 6 November 2025 15:36

Yeah that is the famous very very old Plasma issue with the Border Shadows. The best we could find to prevent this as much as possible what using Rounded-Corners.

However it does not prevent it 100% of the time, but very close. That being said, you should not have the issue consistently.

As of now I cannot reproduce this.

Rounded-Corners is the one to play with to change this behavior, however since we are using this I have seen the issue appear maybe once or twice and that is in a year+.

Better-Blur and Blur should not have any effect on those shadows.

Make sure you are using default Rounded-Corners settings.
And make sure you are using the correct Window Decorations (Catppuccin-Mocha-Classic).

It is possible Wayland vs X11 makes a difference, but I have no proof on that.
Nvidia might come at play, but again no proof.

thezuggler · 6 November 2025 15:47

Thank you so much for taking the time to reply!

I think it’s possible Nvidia is the culprit here. Although Better Blur should not play a role, I notice that the sharp corners only appear for me with blur enabled. Any thoughts why it disappears when blur is disabled?

Yep! Confirmed I have that window decoration set. I used the rounded corner settings suggested by the migration guide and since then have only changed the corner radius, but the issue occurs even for a corner radius of 10.

thezuggler · 6 November 2025 17:02

Ok, it’s not Nvidia I don’t think. I installed on an external disk and running on the same hardware and the issue is not occuring there.

thezuggler · 6 November 2025 17:22

I don’t even know how I got into this state, but I needed to set my anti-aliasing parameter in Better Blur settings to 1.

FGD · 6 November 2025 17:49

Oh that’s interesting, I have to add this to the wiki!
Thanks

system · 8 November 2025 17:49

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