greetings all; Since updating to stretch, udev has been randomly swapping ttyUSB0 and ttyUSB1 and sometimes ttyUSB2 around, confusing the hell out of heyu, a trs-80-coco3, and occasionally even nut. Nut (apc ups) is not on a usb-serial adapter, it just a usb cable but the other 2 are on individually unique FTDI adaptors.
What udev persistent file, and where is it, do I edit and chattr +i to effect a permanent cure for this apparently random device renaming? And whats the command to restart udev from a clean slate without rebooting? These are the ttyUSB ports that need persistent names: root@coyote:rules.d$ usb-devices|grep -C4 SERIAL T: Bus=01 Lev=01 Prnt=01 Port=09 Cnt=01 Dev#= 2 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=0403 ProdID=6001 Rev=04.00 S: Manufacturer=FTDI S: Product=USB HS SERIAL CONVERTER S: SerialNumber=FTDHG45D C: #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=44mA I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=ftdi_sio -- T: Bus=01 Lev=02 Prnt=04 Port=02 Cnt=02 Dev#= 7 Spd=12 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=0403 ProdID=6001 Rev=06.00 S: Manufacturer=FTDI S: Product=USB FAST SERIAL ADAPTER S: SerialNumber=FTOOS09N C: #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=ftdi_sio Thanks. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene>