I am affected by this bug as well with a different device. I experience
identical behavior when I connect the serial console on a Gumstix Tobi
board to my Ubuntu Karmic installation. The problem was not present in
the previous version so this is a regression. I also have multiple
FTDI devices where some are detected as the Watt's Up and some are not.
A bit of digging turned up the following file:
/lib/udev/rules.d/95-devkit-power-wup.rules
which contains:
SUBSYSTEM=="tty", SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403",
ATTRS{idProduct}=="6001", ATTRS{serial}=="A80?????",
ENV{DKP_VENDOR}="Watts Up, Inc.", ENV{DKP_PRODUCT}="Watts Up? Pro",
ENV{DKP_MONITOR_TYPE}="wup"
Thus, the FTDI driver is identified as a Watt's Up if idVendor is 0403,
idProduct is 6001 and serial is A80??????.
To view the serial number of a device, use:
% udevadm info -a -p $(udevadm info -q path -n /dev/ttyUSB0)
Replacing /dev/ttyUSB0 with your serial port.
For the FTDI device that is misidentified, the serial is A80093Q1. For
the FTDI device that is not misidentified, the serial is 0000:00:1a.7.
It appears the line in 95-devkit-power-wup.rules is a bit too aggressive
in identifying the Watt's Up device.
A temporary workaround is to comment the line in 95-devkit-power-
wup.rules and restart udev.
--
devkit-power keeps /dev/ttyUSB0 open, misdetecting Watts-Up power monitor
https://bugs.launchpad.net/bugs/507247
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