[13:47] Hi all, I have a board based on Rockchip RK3399 64-bit SOC based on ARMv8A.The board can boot from the following devices:Micro SD, emmc, USB, NVMe SSD.I have installed ubuntu focal fossa with LXDE Display manager.(I have downloadedfocal-base-arm64.tar.gz and installed all the necessary packages). The board boots fine with ubuntu focal fossa [13:47] installed on Micro SD, emmc, USB.I am using Linux kernel 5.5.10 from kernel.org.When the board is booted via NVMe SSD(this NVMe SSD is connected via PCIe on to the main board), the board looses power(powered off) automatically during the bootprocess. This happens and once kernel loads and systemd trying to fully load ubuntuuser space.In the process [13:47] of identifying what is causing the problem, found out that systemd-udevd is the one.when loading rules from udev/rules.d, some of them are creating a problem.so removed all the rules apart from:50-udev-default.rules, 60-drm.rules, 90-console-setup.rules, 60-block.rules60-serial.rules, 99-systemd.rules.By doing the above change, i am able to get a [13:47] basic command prompt. It says LXDE displaymanager is started but I couldnt get display.Can any one please comment on this issue. Thanks