@ghosty999 - of course if you're logged out, the login manager's (probably lightdm) default resolution will apply. But after re-logging in your user settings should be (re-)applied. Does this happen as one would expect?
(the answer may depend on the answer to @wizardfromoz ' question. if it was...
@Brickwizard Mobile phones running android - when connected to a computer's USB port - are usually not recognized as a mass storage device but as a device using / presenting their files via MTP (media transfer protocol) device.
(edit: only early android phones presented themselves as mass...