Shadows in xrender backend are not displayed correctly #1352
Description
Platform
Arch linux x86_64
GPU, drivers, and screen setup
Lenovo ideapad 330-14AST,
GPU: AMD Radeon R4 Graphics [Integrated]
Is a laptop with one monitor..
mesa 1:24.2.4-1
xf86-video-amdgpu 23.0.0-2
Kernel: Linux 6.11.2-zen1-1-zen
glxinfo -B:
name of display: :0
display: :0 screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
Vendor: AMD (0x1002)
Device: AMD Radeon R4 Graphics (radeonsi, stoney, LLVM 18.1.8, DRM 3.59, 6.11.2-zen1-1-zen) (0x98e4)
Version: 24.2.4
Accelerated: yes
Video memory: 1024MB
Unified memory: no
Preferred profile: core (0x1)
Max core profile version: 4.5
Max compat profile version: 4.5
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.2
Memory info (GL_ATI_meminfo):
VBO free memory - total: 740 MB, largest block: 740 MB
VBO free aux. memory - total: 3344 MB, largest block: 3344 MB
Texture free memory - total: 740 MB, largest block: 740 MB
Texture free aux. memory - total: 3344 MB, largest block: 3344 MB
Renderbuffer free memory - total: 740 MB, largest block: 740 MB
Renderbuffer free aux. memory - total: 3344 MB, largest block: 3344 MB
Memory info (GL_NVX_gpu_memory_info):
Dedicated video memory: 1024 MB
Total available memory: 4434 MB
Currently available dedicated video memory: 740 MB
OpenGL vendor string: AMD
OpenGL renderer string: AMD Radeon R4 Graphics (radeonsi, stoney, LLVM 18.1.8, DRM 3.59, 6.11.2-zen1-1-zen)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 24.2.4-arch1.1
OpenGL core profile shading language version string: 4.50
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL version string: 4.5 (Compatibility Profile) Mesa 24.2.4-arch1.1
OpenGL shading language version string: 4.50
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile
OpenGL ES profile version string: OpenGL ES 3.2 Mesa 24.2.4-arch1.1
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
Environment
BSPWM.
picom version
v12.2 (/startdir/picom revision f9f6f2c)
Diagnostics
Version: v12.2 (/startdir/picom revision f9f6f2c)
Extensions:
- Shape: Yes
- RandR: Yes
- Present: Present
Misc:
- Use Overlay: No
(Another compositor is already running) - Config file specified: None
- Config file used: /etc/xdg/picom.conf
Drivers (inaccurate):
AMDGPU, Radeon
Backend: glx
- Driver vendors:
- GLX: Mesa Project and SGI
- GL: AMD
- GL renderer: AMD Radeon R4 Graphics (radeonsi, stoney, LLVM 18.1.8, DRM 3.59, 6.11.2-zen1-1-zen)
- Accelerated: 1
[ 10/10/24 11:16:30.643 egl_init WARN ] The egl backend is still experimental, use with care.
Backend: egl
- Driver vendors:
- EGL: Mesa Project
- EGL driver: radeonsi
- GL: AMD
- GL renderer: AMD Radeon R4 Graphics (radeonsi, stoney, LLVM 18.1.8, DRM 3.59, 6.11.2-zen1-1-zen)
Configuration:
Configuration file
## ----- Shadows ----- ##
shadow = true;
shadow-radius = 7;
#shadow-opacity = .6
shadow-offset-x = -8;
shadow-offset-y = -8;
shadow-color = "#000000"
## ----- Fading ----- ##
fading = true;
fade-in-step = 0.03;
fade-out-step = 0.03;
fade-delta = 5
no-fading-openclose = true
no-fading-destroyed-argb = true
## ----- Transparency ----- ##
frame-opacity = 1.0;
# inactive-dim-fixed = true
## ----- Corners ----- ##
corner-radius = 6
#################################
# General Settings #
#################################
# Available backends "xrender" "glx" "egl"
backend = "xrender"
dithered-present = false;
vsync = true;
glx-no-stencil = true;
glx-no-rebind-pixmap = true;
detect-rounded-corners = true;
detect-client-opacity = true;
detect-transient = true;
use-damage = true;
# xrender-sync-fence = false
# transparent-clipping = false
Steps of reproduction
Just enable the xrender backend, and the shadows look cut off. With the glx and egl backend the shadows work well.
- kill picom
- edit config to change to xrender
- restart picom
Expected behavior
show the normal shadows, this image is with glx backend and colored shadows in red to you can see better. This works fine!
Current Behavior
Now in xrender the shadows are cute off.
Stack trace
the compositor doesnt crash :)
OpenGL trace
Other details
simplescreenrecorder-2024-10-10_11.36.10.mp4
Note: I have some other laptops and desktops and I have only tried the new version 12 on this laptop and on a desktop PC with old hardware, with Intel graphics and the problem is the same, with glx it works fine and with xrender the shadows fail . Animations and everything else works fine.