Interesting. But why do you need to give a MAC address on cmdline.txt on the RPi and in the XO udev script? g_ether should assign an address, and cdc_ether should receive it from USB descriptors.
On Tue, Jul 10, 2018 at 10:50:44AM -0400, Carrol Riddle wrote: > Soliciting info or pointers to resources for disabling mac address > randomization by NetworkManager for USB0 (eth1) on XO's. Wifi mac addresses > are not randomized. > > An XO can share its Wifi over wired ethernet link (USB0) where it can be used > by > a Chromium browser on a linked Raspberry Pi Zero (not W). SSH -X on the link > allows XO keyboard and display to be used for Chromium. > > The several setup steps are simple, but must be repeated with each boot since > NetworkManager (version 0.9.8.* on XO's) supplies a different mac address for > the link on each boot. To provide a simple Sugar wrapper to run Chromium, a > consistent mac address would be needed. > > Methods from web searches have not been successful in disabling > randomization, > largely since they use features added after 0.9.8. Using a udev rule to > "ifconfig > usb0 hw ether address" has come the closest, but breaks after a few boots and > returns to > randomization. > > BACKGROUND > > For those interested, details are below, but are only peripheral to question. > This use of the XO's display, keyboard and wifi by Chromium / Zero provides > a low cost way to access a widely accepted browser. The Zero can be plugged > into XO USB for power and signals. The Zero is > available for < $10, and with SD card and plug, total cost should be $15 - 20 > USD. > > > ______________________________________ > > > MANUAL METHOD - XO (after Pi Zero setup) > > In Sugar, connect to wifi . This needs to be done only the first time and is > persistent between boots. Switch to Gnome and disconnect from the "Wired > connection ?" that just formed. Edit the connection : IPv6 to ignore, IPv4 to > require IPv4 and "shared to other computers" and save. Connect to this > connection. The connection info should show ip address starting with 10: . > This link is not persistent between boots. > > systemctl enable sshd.service > > PI ZERO SETUP (prior) > > Raspberry Pi Zero with Raspbian Desktop installed. To /boot/config.txt on > Pi > SD edit and add dtoverlay=dwc2 . To /boot/cmdline.txt add after "rootwait" > modules-load=dwc2,g_ether host_addr=00:22:82:ff:ff:20 > dev_addr=00:22:82:ff:ff:22 (Substitute local mac addresses.) To > start with SSH, add dummy "ssh" file to /boot directory. On XO, ssh > pi@raspberrypi.local with password raspberry . Configure Zero to boot to > command line (CLI) with raspi-config . To use Raspbian desktop, ssh -X > pi@raspberry.local, and then /etc/X11/Xsession. The Pi Tool Bar partially > overlaps the Gnome Tool Bar, but selecting "medium display size" minimizes > affects. > > UDEV INFO FOR RULES (but not able to make work) > > DRIVERS=="cdc_ether" > > ATTRS{idVendor=1d6b} > > ATTRS{idProduct=0001} > > RUN+="/etc/udev/scripts/rpi" > > > Script rpi: > > ifconfig usb0 down > > ifconfig usb0 hw ether 00:22:82:FF:FF:20 > > ifconfig usb0 up > > _____________________________ > > Carrol Riddle > > ebox...@scishare.com > _______________________________________________ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel -- James Cameron http://quozl.netrek.org/ _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel