diff --git a/frontend/device/kobo/device.lua b/frontend/device/kobo/device.lua
index 39aa1b424..c677227e8 100644
--- a/frontend/device/kobo/device.lua
+++ b/frontend/device/kobo/device.lua
@@ -143,6 +143,7 @@ end
 
 function Kobo:resume()
     os.execute("echo 0 > /sys/power/state-extended")
+    -- HACK: wait a bit for the kernel to catch up
     os.execute("sleep 0.1")
     -- cf. #1862, I can reliably break IR touch input on resume...
     if os.getenv("FROM_NICKEL") == "true" then