I've got this below. When I hover over the fabric mini graphs I do have populated graphs. Is this what you mean? Below is the crossbar from observium in text format.
6500/7600 Crossbar
Chassis 1 WS-C6506-E DCEF
Fabric 0 ok 20Gbps
Ingress0%
Egress0%
Chassis 1 Physical Slot 1 DCEF
Fabric 0 ok 40Gbps
Ingress0%
Egress0%
Fabric 1 ok 40Gbps
Ingress0%
Egress0%
Chassis 1 Physical Slot 2 DCEF
Fabric 0 ok 40Gbps
Ingress0%
Egress0%
Fabric 1 ok 40Gbps
Ingress0%
Egress0%
Chassis 1 Physical Slot 4 DCEF
Fabric 0 ok 20Gbps
Ingress0%
Egress0%
Fabric 1 ok 20Gbps
Ingress0%
Egress0%