Cisco 3750 stacking fast Link light issues please help

so i have a two WS-C3750X-48T-L   switches that i have stacked, my issue is i have set up cross switch port channeling on the stack. in my case i have ports gi1/0/1, gi1/0/2, gi2/0/1, gi2/0/2 in a single port-group. this port group is connected to a single 6509 that i have on the other end. all link lights look fine on the 6509 side but on the 3750 side if i connect even one port on the 3750 the link light starts blinking green very fast. every thing iv learns stays that is either a loop or a duplex miss match. note there are no computers besides an APC transfer switch plugged in to the 3750 stack on sw2. is this link light a product of the stacking and is it normal. if it isn't which im thinking its not... how would i troubleshoot something that has a loop in it by design. connectivity to the APC works great but there is not much traffic on the switch yet. i have span the port-channel and don't see any STP traffic in wireshark. only a bit of broadcasts and multicast from servers around the network.  if there is any command or additional info that is needed to help TS this issue let me know ill get it.

xxx-3750-Rack_B#sh switch

Switch/Stack Mac Address : 000f.f75c.e300

                                           H/W   Current

Switch#  Role   Mac Address     Priority Version  State

----------------------------------------------------------

*1       Master 000f.f75c.e300     1      0       Ready

 2       Member 000f.f75d.0e80     1      0       Ready

xxx-3750-Rack_B#sh int gi2/0/1

GigabitEthernet2/0/1 is up, line protocol is up (connected)

  Hardware is Gigabit Ethernet, address is 000f.f75d.0e81 (bia 000f.f75d.0e81)

  Description: portchannel to 6509-Swi#2

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive not set

  Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX SFP

  input flow-control is off, output flow-control is unsupported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:43, output 00:00:38, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 151000 bits/sec, 123 packets/sec

  5 minute output rate 1000 bits/sec, 1 packets/sec

     7317390 packets input, 1127298799 bytes, 0 no buffer

     Received 5103412 broadcasts (3787915 multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 3787915 multicast, 0 pause input

     0 input packets with dribble condition detected

     6863 packets output, 1536552 bytes, 0 underruns

     0 output errors, 0 collisions, 2 interface resets

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier, 0 PAUSE output

     0 output buffer failures, 0 output buffers swapped out

xxxx-IOS-6509-Swi1#sh int gi3/7

GigabitEthernet3/7 is up, line protocol is up (connected)

  Hardware is C6k 1000Mb 802.3, address is 0009.11e6.cafe (bia 0009.11e6.cafe)

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 1000Mb/s, media type is SX

  input flow-control is off, output flow-control is off

  Clock mode is auto

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:08, output 00:00:13, output hang never

  Last clearing of "show interface" counters 2y25w

  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 135000 bits/sec, 133 packets/sec

     6904 packets input, 1545692 bytes, 0 no buffer

     Received 3478 broadcasts (3354 multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 0 multicast, 0 pause input

     0 input packets with dribble condition detected

     7330192 packets output, 1128728395 bytes, 0 underruns

     0 output errors, 0 collisions, 1 interface resets

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier, 0 PAUSE output

     0 output buffer failures, 0 output buffers swapped out

these are the only interfaces int the port channel that are connected. note even if i connect all memebers of the port channel i still get very fast blinking link lights.

Found the answer.... Wow I'm dumb ... WS-C3750X-48T-S   gig ports blink fast to show they are running at gig speeds maybe I will read the documentation next time...