I've got an odd one, I have a couple HP ProCurve 2910s that are blocking ports by STP. The odd thing is that PCs are connected directly to these ports. So, I can't for the life of me figure out why the switch is blocking the ports.
I've verified the cabling and that, in this example, port 26 is connected directly to a PC.
Here's a snippet from the log:
I 05/11/16 13:41:30 00077 ports: port 26 is now off-line I 05/11/16 13:41:32 00435 ports: port 26 is Blocked by STP I 05/11/16 13:41:33 00077 ports: port 26 is now off-line I 05/11/16 13:41:48 00435 ports: port 26 is Blocked by STP I 05/11/16 13:41:59 00077 ports: port 26 is now off-line I 05/11/16 13:42:07 00435 ports: port 26 is Blocked by STP I 05/11/16 13:42:41 00076 ports: port 26 is now on-line I 05/11/16 13:44:54 00077 ports: port 26 is now off-line I 05/11/16 13:48:06 00435 ports: port 26 is Blocked by STP I 05/11/16 13:48:40 00076 ports: port 26 is now on-line
Your logs indicate the connection is flapping for some reason. I'd configure the switchport to 100Mb manually to see if it makes a difference - if it does, then you probably have a cabling issue you need to fix.
