I am not even sure if I am posting this in the correct place as I have no idea what actually is the problem.

I got my Antminer U2's out of storage to sell a few to a friend who was wanting to collect old asic miners. Out of the 11 I have only 4 show up as show up as ANU. The other 9 show up as AU3, which of course just throws errors. I am running cgminer 4.11.1 on Raspberry Pi 4.

I have changed usb hubs, deleted cgminer.conf, rebuilt cgminer and they still show up as AU3.
I remember using --usb ICA:0 in the past to disable block erupters in the past. It has been so long since I have used these. I remember using --usb ICA:0 to run two instances of cgminer, one for Blue Furry and one with the antminers.

I know --usb AU3 does not work. Anyone know how I can keep them from being detected as U3?

Is it possible to set each AntMiner U2 at different clock. I purchased some used ones. Two of the used U2 show there age and do not want to run at 2.0 but will run at 1.8 same with two older U1 they will only run at 1.6.  If I try to set them anything else x0881 and x0781 respectively they hit about 30% hardware errors.  I have tried the following config file but it seems to read and use the last antminer:clock=.

Code:

{
"pools" : [
	{
		"url" : "stratum.bitcoin.cz:3333",
		"user" : "XXXXX",
		"pass" : "XXXXX",
		"pool-priority" : "0"
	},
	{
	"url" : "stratum.btcguild.com:3333",
		"user" : "XXXXX",
		"pass" : "XXXXX",
		"pool-priority" : "1"
	}
]
,
"api-listen" : true,
"api-mcast-port" : "4028",
"api-port" : "4028",
"expiry" : "120",
"expiry-lp" : "3600",
"failover-switch-delay" : "300",
"log" : "20",
"no-pool-disable" : true,
"no-client-reconnect" : true,
"no-show-processors" : true,
"no-show-procs" : true,
"no-unicode" : true,
"queue" : "1",
"quiet-work-updates" : true,
"quiet-work-update" : true,
"scan-time" : "60",
"skip-security-checks" : "0",
"submit-stale" : true,
"temp-hysteresis" : "3",
"shares" : 0,
"kernel-path" : "C:\\Program Files\\BFGMiner\\/share/bfgminer",
"scan" : [
	"bigpic:COM6",
	"antminer:COM7",
	"antminer:COM8",
	"antminer:COM9",
	"antminer:COM10",
	"antminer:COM11",
	"antminer:COM12",
	"antminer:COM13",
	"antminer:COM14",
	"antminer:COM15",
	"antminer:COM16",
	"antminer:COM17",
	"antminer:COM18",
	"antminer:COM21",
	"erupter:COM19",
	"erupter:COM20"
],
"set-device" : [
	"antminer@COM7:clock=x0981",
	"antminer@COM8:clock=x0981",
	"antminer@COM9:clock=x0981",
	"antminer@COM10:clock=x0981",
	"antminer@COM11:clock=x0981",
	"antminer@COM12:clock=x0981",
	"antminer@COM13:clock=x0981",
	"antminer@COM14:clock=x0981",
	"antminer@COM15:clock=x0901",
	"antminer@COM16:clock=x0901",
	"antminer@COM17:clock=x0781",
	"antminer@COM18:clock=x0781",
	"antminer@COM21:clock=x0981"
],
"api-allow" : "W:127.0.0.1"
}

What is the size of heatsinks for chips on Antminer U2? I know thermal taped small heatsinks won't do much, but better than nothing (with good thermal tape). I am just having trouble searching for the size of chips and I can't find any sets for sale atm. Search Fail

Is there a way to continue OpenCL GPU mining while using remote desktop.  I am using BFGMiner.  Windows changes display adapter when in remote desktop causing my mining to stop.  Is there a way to force it to use the GPU hardware even tough Windows changes display adapters? Other mining software that will allow me to do so?