[juneau-lug] Re: losing permissions
- From: Kevin Miller <Kevin_Miller@xxxxxxxxxxxxxxx>
- To: "'juneau-lug@xxxxxxxxxxxxx'" <juneau-lug@xxxxxxxxxxxxx>
- Date: Thu, 27 Feb 2014 11:40:42 -0900
Are you running it through a hub? If so, can you do w/o?
Have you tried swapping USB ports?
...Kevin
--
Kevin Miller
Network/email Administrator, CBJ MIS Dept.
155 South Seward Street
Juneau, Alaska 99801
Phone: (907) 586-0242, Fax: (907) 586-4500
Registered Linux User No: 307357
-----Original Message-----
From: juneau-lug-bounce@xxxxxxxxxxxxx [mailto:juneau-lug-bounce@xxxxxxxxxxxxx]
On Behalf Of Jamie
Sent: Thursday, February 27, 2014 11:28 AM
To: juneau-lug@xxxxxxxxxxxxx
Subject: [juneau-lug] losing permissions
Kevin may be interested to know that his old Shuttle is still in running and
providing support for my remote weather station. This La Crosse
2316 weather station connects via ttyUSB0.
The problem: for unknown reasons the device periodically disconnects (see log
below) and when it re-connects it has lost its elevated permissions and fails
to upload the data. It did it again today. I logged in and did a "sudo chmod
766 /dev/ttyUSB0 " & it's back up and working. It just started doing this a
month or so ago and this is the third time.
1) Why is it doing this?
2) How do I prevent it?
My previous attempt at creating a udev rule to set permissions was
unsuccessful. It has always lost elevated permissions when re-booting.
In my latest attempt just now I added the line:
KERNEL="ttyUSB[0-9]*", GROUP="dialout", MODE="0766", ENV{GENERATED}="1"
to the file:
/etc/udev/rules.d/91-persistent-weather-usb.rules
Does this seem right? Thanks for any help.
-Jamie
Log:
Feb 27 08:44:13 Hig01 kernel: [1448796.824052] hub 2-0:1.0: port 1 disabled by
hub (EMI?), re-enabling...
Feb 27 08:44:13 Hig01 kernel: [1448796.824137] usb 2-1: USB disconnect, device
number 4 Feb 27 08:44:13 Hig01 kernel: [1448796.824367] ftdi_sio ttyUSB0: FTDI
USB Serial Device converter now disconnected from ttyUSB0 Feb 27 08:44:13 Hig01
kernel: [1448796.824395] ftdi_sio 2-1:1.0: device disconnected Feb 27 08:44:13
Hig01 kernel: [1448797.064021] usb 2-1: new full-speed USB device number 5
using uhci_hcd Feb 27 08:44:13 Hig01 kernel: [1448797.242074] usb 2-1: New USB
device found, idVendor=0403, idProduct=6001 Feb 27 08:44:13 Hig01 kernel:
[1448797.242082] usb 2-1: New USB device
strings: Mfr=1, Product=2, SerialNumber=0 Feb 27 08:44:13 Hig01 kernel:
[1448797.242088] usb 2-1: Product: USB <-> Serial Feb 27 08:44:13 Hig01 kernel:
[1448797.242092] usb 2-1: Manufacturer: FTDI Feb 27 08:44:13 Hig01 kernel:
[1448797.248147] ftdi_sio 2-1:1.0: FTDI USB Serial Device converter detected
Feb 27 08:44:13 Hig01 kernel: [1448797.248199] usb 2-1: Detected FT232BM Feb 27
08:44:13 Hig01 kernel: [1448797.248204] usb 2-1: Number of endpoints 2 Feb 27
08:44:13 Hig01 kernel: [1448797.248208] usb 2-1: Endpoint 1 MaxPacketSize 64
Feb 27 08:44:13 Hig01 kernel: [1448797.248212] usb 2-1: Endpoint 2
MaxPacketSize 64 Feb 27 08:44:13 Hig01 kernel: [1448797.248216] usb 2-1:
Setting MaxPacketSize 64 Feb 27 08:44:13 Hig01 kernel: [1448797.250205] usb
2-1: FTDI USB Serial Device converter now attached to ttyUSB0
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