Greetings.
Tell me about how your laptop connection makes it back to the mgmt 1Gb port on the FIs (i.e. over VPN, same LAN, etc)
What UCSM version, and what interface (java or HTML5)?
After you have confirmed the UCSM GUI sluggishness is a universal problem from other workstations/guestVMs with local LAN access to the UCSM, lets check CPU utilization on both the FIs:
#connect local-mgmt
#show processes
#connect nxos
nxos#show system resources
nxos#show system resources free
You may need to open a ticket with TAC if both Java/HTML5 interfaces are sluggish, and nothing is pounding the UCSM (i.e. overly aggressive SNMP polling)
Thanks,
Kirk...