Your system information

• Steam client version: 1773426488
• Distribution: openSUSE Tumbleweed 20260317
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes
• GPU: Intel Iris Xe (ADL GT2), Mesa 26.0.2

Please describe your issue in as much detail as possible:

Native Steam UI repaints correctly; only CEF-rendered web surfaces (store, library) go black when switching workspaces. Switching back to the Steam workspace and doing a maximize/minimize forces a repaint.

Findings:

• steamui.so constructs and passes webhelper flags internally — STEAM_CEF_ARGS is not implemented in steam.sh on this build and is silently ignored
• The only injection point is ubuntu12_64/steamwebhelper_sniper_wrap.sh, but Steam checksums its own files and self-repairs on next launch (BVerifyInstalledFiles: steamwebhelper_sniper_wrap.sh is 655 bytes, expected 623)
• With GPU acceleration enabled, webhelper is launched with no --disable-gpu flags, confirming this is not a GPU path issue
• GDK_BACKEND=x11 does not resolve it, ruling out a pure Wayland compositor (Mutter) repaint signaling issue
• gamescope nested mode (-e) falls back to headless backend under GNOME and never presents a window, so that path is also blocked
• Root cause appears to be CEF not receiving damage/expose events for its render surfaces when the window loses visibility across workspace switches, and not repainting on reactivation — independent of GPU acceleration state and display backend

Workaround: https://github.com/kodefabrik/steam-cef-repaint

Steps for reproducing this issue:

1. Open Steam on one workspace
2. Switch to a different workspace
3. Switch back to the Steam workspace
4. CEF web surfaces (store, library) are black until a minimize/maximize cycle is performed