corrupted desktop background when root background is a pixmap with RetainTemporary #1081
Description
Environment
icewm window manager version 3.something on Linux.
picom version
vgit-dd85c
Diagnostics
**Version:** vgit-dd85cExtensions:
- Shape: Yes
- RandR: Yes
- Present: Present
Misc:
- Use Overlay: No
(Another compositor is already running) - Config file used: None
Drivers (inaccurate):
modesetting
Backend: glx
- Driver vendors:
- GLX: Mesa Project and SGI
- GL: Intel Open Source Technology Center
- GL renderer: Mesa DRI Intel(R) HD Graphics 4000 (IVB GT2)
- Accelerated: 1
Backend: egl
[ 06/19/23 10:59:29.155 egl_init ERROR ] EGL version too old, need at least 1.5.
Cannot initialize this backend
Configuration:
picom -f -I 0.09 -O 0.09
Steps of reproduction
- ~/.icewm/prefoverride contains:
DesktopBackgroundImage="/path/to/same/background.jpg" - ~/.icewm/preferences contains:
Alpha=1 - Have several workspaces with application windows, like terminals, browsers, etc.
- start icewm and picom
- restart icewm
- go to other workspaces and restart icewm again.
Expected behavior
The desktop background should be identical to the background.jpg image.
Current Behavior
The desktop background is corrupted with partial areas of application windows. They disappear by moving a window over the corrupted areas.
When picom is not running this problem doesn't occur.
By setting a single background image, the icewmbg process install a root pixmap with the background image using XSetCloseDownMode(display(), RetainTemporary); and exits.