Some Dell (OptiPlex/Pro Micro 7020) and HP (EliteDesk 800 G4) UEFIs
can't handle Mass Storage + HID on a single USB port, causing a black
screen, boot loop, or lost BIOS settings.
Document the recommended workaround `otg/devices/msd/start: false`,
which keeps MSD configured but unstarted at boot (re-enable on demand
via kvmd-otgconf), alongside the existing full-disable method. Note the
affected hardware and warn against confusing the `msd` and `drives`
config sections.
Co-authored-by: Mohammed Awad <mawad10101@gmail.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
