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pages/Configuring/Environmental-variables.md
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@ -11,56 +11,56 @@ Linux distros.
## XDG Specifications
- XDG_CURRENT_DESKTOP=Hyprland
- XDG_SESSION_TYPE=wayland
- XDG_SESSION_DESKTOP=Hyprland
- `XDG_CURRENT_DESKTOP=Hyprland`
- `XDG_SESSION_TYPE=wayland`
- `XDG_SESSION_DESKTOP=Hyprland`
XDG specific environmental variables are often detected through portals and applications that may
set those for you, however it is a good idea to provide them in your wrapper script as a fail-safe.
## QT Variables
- QT_AUTO_SCREEN_SCALE_FACTOR=1 - [(From the QT documentation)](https://doc.qt.io/qt-5/highdpi.html)
- `QT_AUTO_SCREEN_SCALE_FACTOR=1` - [(From the QT documentation)](https://doc.qt.io/qt-5/highdpi.html)
enables automatic scaling, based on the monitor's pixel density
- QT_QPA_PLATFORM="wayland;xcb" - Tell QT applications to use the Wayland backend, and fall back to x11 if Wayland is unavailable
- QT_WAYLAND_DISABLE_WINDOWDECORATION=1 - Disables window decorations on QT applications
- QT_QPA_PLATFORMTHEME=qt5ct - Tells QT based applications to pick your theme from qt5ct, use with Kvantum.
- `QT_QPA_PLATFORM="wayland;xcb"` - Tell QT applications to use the Wayland backend, and fall back to x11 if Wayland is unavailable
- `QT_WAYLAND_DISABLE_WINDOWDECORATION=1` - Disables window decorations on QT applications
- `QT_QPA_PLATFORMTHEME=qt5ct` - Tells QT based applications to pick your theme from qt5ct, use with Kvantum.
## NVIDIA Specific
To force GBM as a backend, set the following environment variables:
- GBM_BACKEND=nvidia-drm
- \_\_GLX_VENDOR_LIBRARY_NAME=nvidia
- `GBM_BACKEND=nvidia-drm`
- `__GLX_VENDOR_LIBRARY_NAME=nvidia`
> See [Archwiki Wayland Page](https://wiki.archlinux.org/title/Wayland#Requirements) for more details on those variables.
- LIBVA_DRIVER_NAME=nvidia - Hardware acceleration on NVIDIA GPUs
- `LIBVA_DRIVER_NAME=nvidia` - Hardware acceleration on NVIDIA GPUs
> See [Archwiki Hardware Acecleration Page](https://wiki.archlinux.org/title/Hardware_video_acceleration)
> for details and necessary values before setting this variable.
- \_\_GLX_GSYNC_ALLOWED - Controls if G-Sync capable monitors should use Variable Refresh Rate (VRR)
- `__GLX_GSYNC_ALLOWED` - Controls if G-Sync capable monitors should use Variable Refresh Rate (VRR)
> See [Nvidia Documentation](https://download.nvidia.com/XFree86/Linux-32bit-ARM/375.26/README/openglenvvariables.html) for details.
- \_\_GL_VRR_ALLOWED - Controls if Adaptive Sync should be used. Recommended to set as "0" to avoid having problems on some games.
- `__GL_VRR_ALLOWED` - Controls if Adaptive Sync should be used. Recommended to set as "0" to avoid having problems on some games.
- WLR_DRM_NO_ATOMIC=1 - use legacy DRM interface instead of atomic mode setting. Might fix flickering issues.
- `WLR_DRM_NO_ATOMIC=1` - use legacy DRM interface instead of atomic mode setting. Might fix flickering issues.
## Toolkit Backend Variables
- SDL_VIDEODRIVER=wayland - Run SDL2 applications on Wayland. Remove or set to x11 if games that provide older versions of SDL cause
- `SDL_VIDEODRIVER=wayland` - Run SDL2 applications on Wayland. Remove or set to x11 if games that provide older versions of SDL cause
compatibility issues
- \_JAVA_AWT_WM_NONEREPARENTING=1 - Fix possibly broken Java applications. Set to 1 until Wakefield is available.
- CLUTTER_BACKEND="wayland" - Clutter package already has wayland enabled, this variable will force Clutter applications
- `_JAVA_AWT_WM_NONEREPARENTING=1` - Fix possibly broken Java applications. Set to 1 until Wakefield is available.
- `CLUTTER_BACKEND="wayland"` - Clutter package already has wayland enabled, this variable will force Clutter applications
to try and use the Wayland backend
- GDK_BACKEND - Force backend for wayland-enabled GTK3 and GTK4 backends. Available options are "wayland" or "x11". If GTK XWayland
- `GDK_BACKEND` - Force backend for wayland-enabled GTK3 and GTK4 backends. Available options are "wayland" or "x11". If GTK XWayland
applications cause issues when set to "wayland", try "wayland,x11"
## Theming Related Variables
- GTK_THEME - Set a GTK theme manually, for those who want to avoid appearance tools lxappearance or nwg-look
- XCURSOR_THEME - Set your cursor theme. The theme needs to be installed and readable by your user.
- XCURSOR_SIZE - Set cursor size. See [here](../FAQ/) for why you might want this variable set.
- `GTK_THEME` - Set a GTK theme manually, for those who want to avoid appearance tools lxappearance or nwg-look
- `XCURSOR_THEME` - Set your cursor theme. The theme needs to be installed and readable by your user.
- `XCURSOR_SIZE` - Set cursor size. See [here](../FAQ/) for why you might want this variable set.