Sarah Messer wrote:
> My base problem is that I can access a USB device (Tektronix TDS
> 2014B oscilloscope) only as root.
...
> the device & endpoints are added to GID=1000 w/ permissions 664
> (illustrated below), but this still does not allow non-root users to
> actually control the device. (I get an "Operation not permitted"
> error
How are you trying to control the device? What software and what
interface is it using? If (for example) you're using an older version
of libusb that uses /proc/bus/usb, you'll have problems because udev
only sets permissions on /dev/bus/usb. You could use a rule similar
to this to set it in both places ($ENV{DEVICE} points to
/proc/bus/usb):
ATTRS{idVendor}=="04d8", MODE="0664", GROUP="plugdev"
ATTRS{idVendor}=="04d8", RUN+="/bin/chmod 664 $ENV{DEVICE}"
ATTRS{idVendor}=="04d8", RUN+="/bin/chgrp plugdev $ENV{DEVICE}"
-jim
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