Try DFP-0
Also, you are missing this last lines in your conf
You only need to add to the modules if you enable early KMS, and is already explained
Now, with the latest mkinitcpio
the entries are all between ( ) and not " " but still is not a big issue, because will work with both …
Well, if the LG is initiating slower than the Benq and your Samsung, then that might be an explanation, but i’m not 100% sure.