Greetings, I'm running a Raspberry Pi 4, headless, Tumbleweed 20210209 JeOS, booting from USB3. End of December 2020, I was forced to add an lock on the update of kernel-default. At the moment I'm still running 5.9.14-1-default. The thing is I cannot update to kernel 5.10. If I do that, initrd is not able to find the root filesystem anymore. In fact, USB seems to be absent in the initrd stage, although, as far as I can see, all modules are present. The situation can be reproduced with a fresh image: http://download.opensuse.org/ports/aarch64/tumbleweed/appliances/openSUSE-Tu... Booting such an image from the SD card slot works. Booting the same image via USB fails in the initrd stage. More information can be found in a forum thread that I started: https://forums.opensuse.org/showthread.php/549232-RPI4-USB-boot-fails-with-k...) I did find this message (Regression observed on Rasbperry Pi 4 with snapshot 20201214): https://lists.opensuse.org/archives/list/arm@lists.opensuse.org/thread/5BEWN... but that seems to be related to u-boot and GRUB. My problem seems to occur later, in initrd. But then again, who am I? I'd be happy to provide more information and am willing to try to debug the issue that I'm facing, but I will need a little bit of help with that. -- Best regards, Paul.