How to recover when monitor goes blank.

[Ram Ramesh <rramesh2400@gmail.com>]

    Hi,
    
      I have my monitor, keyboard and mouse shared through a KVM switch.
    One host is Linux Debian bookworm 12.5 and another is laptop running
    Windows 11. When I leave KVM on the laptop side for extended period
    I have issues switching back to Debian side. When I switch, the
    screen is blank and KB does not respond as if Debian is running
    headless. I had to remote login and reboot Debian side with KVM
    locked on this side to get back the monitor/KB. This happens
    regardless of whether I am in Xorg or VT.  I do not know how to
    force Debian/Linux to check for monitor/KB again after extended
    period of disconnect when it has assumed it is running headless. Any
    solutions?
    
    Regards
    Ramesh