Pick a renderer from the GPU and fall back to software rendering

default/sddm/hyprland-greeter.lua

@@ -1,6 +1,31 @@
 -- Hyprland config for the SDDM Wayland greeter. SDDM starts the greeter itself
 -- once the compositor is up, so nothing here launches anything.
+-- The greeter runs as SDDM's own user, with no BLOB_PATH and no read access to
+-- the checkout, so it calls the copy install.sh puts in /usr/local/bin rather
+-- than loading the Lua modules the session uses. A detector that is not there
+-- yet reads as no acceleration, which is the fallback that always draws.
+local function gpu_is_accelerated()
+  local pipe = io.popen("/usr/local/bin/blob-hw-gpu-accelerated >/dev/null 2>&1 && echo OK")
+  if not pipe then
+    return false
+  end
+
+  local output = pipe:read("*a") or ""
+  pipe:close()
+
+  return output:match("OK") ~= nil
+end
+
+if not gpu_is_accelerated() then
+  hl.env("LIBGL_ALWAYS_SOFTWARE", "1")
+  hl.env("WLR_NO_HARDWARE_CURSORS", "1")
+end
+
 hl.config({
+  cursor = {
+    no_hardware_cursors = true,
+  },
+
   misc = {
     disable_hyprland_logo = true,
     disable_splash_rendering = true,