@gerald: right, there is no way to protect you from turning the device into a brick if this step goes wrong (unlike kernel or rootfs we can not roll back the bootloader)
note that the gadget snap from edge will not have a working dtb for the old kernel which will likely make you end up with an unbootable device. sadly on the pi the dtb gets loaded by the binary blob which is why we can not just use it from the kernel snap (which would fix this problem). -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1647936 Title: Raspberry Pi 3: a small rainbow square on the top right of screen Status in Snappy: Fix Committed Status in linux package in Ubuntu: Invalid Bug description: I'm working on the WD/nextcloud project, and found this issue Download the UC16 for Raspberry Pi 3 from http://releases.ubuntu.com/ubuntu-core/16/ubuntu-core-16-pi3.img.xz unxz , dd the image to sd card and boot up the system. There is a small rainbow square on top right of HDMI monitor. From RPI forum: https://www.raspberrypi.org/forums/viewtopic.php?t=82373 If the voltage is under 4.65V, firmware displays a rainbow square on top right of screen and power LED goes off. But for UC16 the rainbow square is always there even the voltage is sufficient, but the power LED works properly. So I also check 1. Ubuntu server for RPI3 from here: https://wiki.ubuntu.com/ARM/RaspberryPi This RPI3 image works properly (if the voltage is not sufficient, rainbow square shows on the top right of screen, if it's sufficient, no rainbow square shows up) 2. Rasbian (jessie lite): https://downloads.raspberrypi.org/raspbian_lite_latest This works properly too, and the official Rasbian was released with the latest firmware, so the rainbow square changes to a lighting icon It looks the firmware might be old in UC16? so the under-voltage warning doesn't display correctly. To manage notifications about this bug go to: https://bugs.launchpad.net/snappy/+bug/1647936/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
