Pontius - what Avalon/Bitburner devices are you mining with? What command line arguments are you using?
Bitburner XX
cgminer -n
[2013-10-26 11:06:02] USB all: found 9 devices - listing known devices
.USB dev 0: Bus 4 Device 32 ID: 0403:6001
Manufacturer: 'Burnin Electronics'
Product: 'BitBurner'
[2013-10-26 11:06:02] 1 known USB devices
No command line options, everything is inside the ~/.cgminer/cgminer.conf:
{
"api-listen" : true,
"api-allow" : "W:127.0.0.1,172.16.8.0/23",
"avalon-options" : "115200:4:10:d:372",
"avalon-temp" : "40",
"bitburner-voltage" : "1170",
"queue" : "4",
"usb" : ":1",
"load-balance" : true,
"pools" : [
[...]
]
}