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Title: Trezor Electrum Connection Problem on Ubuntu -- solved Post by: tl121 on December 24, 2014, 10:18:13 PM I have been using a Trezor with Electrum 2.0 on Ubuntu 14.04 LTS. Yesterday after a system update it stopped working. Electrum wouldn't talk to Trezor. I wasted a lot of time tracking down the root cause of the problem, USB device security had been "upgraded". What I discovered was that Electrum talked to Trezor, but only if I ran it as root. The following command will show the connection problem as an O/S configuration problem. Run this both as a normal user and as root and you will see the connection problem. This is a convenient way to see if your problem is with the O/S and not the Electrum setup.
lsusb -v -d 0x534c:0x0001 I fixed the protection problem by creating a file in /etc/udev/rules.d. The file name is 60-trezor.rules The file contents are # # SUBSYSTEM=="usb_device", SYSFS{idVendor}=="534c", MODE="0666" SUBSYSTEM=="usb", ATTRS{idVendor}=="534c", MODE="0666" |