Fix Hibernation resume on nvidia computers

default/systemd/system-sleep/force-igpu

@@ -5,14 +5,25 @@
 # will wake after suspend in Hybrid mode, even if the system was in Integrated mode before
 # suspending.
 
-if [[ $1 == "post" ]]; then
-  # small delay so the device is fully re-enumerated
-  sleep 4
+case "$1" in
+  pre)
+    # Before hibernating, switch to Vfio so the nvidia driver is detached from the dGPU.
+    # Without this, hibernate resume fails because the nvidia driver can't freeze a
+    # powered-off dGPU (returns -EIO), which aborts the entire resume.
+    if [[ $2 == "hibernate" ]]; then
+      /usr/bin/supergfxctl -m Vfio
+      sleep 1
+    fi
+    ;;
+  post)
+    # small delay so the device is fully re-enumerated
+    sleep 4
 
-  # force-bind dGPU to vfio (fully detached from nvidia)
-  /usr/bin/supergfxctl -m Vfio
-  sleep 1
+    # force-bind dGPU to vfio (fully detached from nvidia)
+    /usr/bin/supergfxctl -m Vfio
+    sleep 1
 
-  # then go back to Integrated, which powers it off again
-  /usr/bin/supergfxctl -m Integrated
-fi
+    # then go back to Integrated, which powers it off again
+    /usr/bin/supergfxctl -m Integrated
+    ;;
+esac