so this is indeed not an issue with the modules but with the kernel itself and the support for sas, uas or the enclosure services.
i test-built all tags from https://git.launchpad.net/~ubuntu- kernel/ubuntu/+source/linux-raspi/+git/focal/refs/tags from 1023.26 going backwards and found that it reliably works until Ubuntu- raspi-5.4.0-1013.13 and reliably hangs with Ubuntu-raspi-5.4.0-1014.14 so somewhere between these two tags the breakage was introduced ... i have now also tried to boot either of the 20.10 images (desktop, server, UC18) and they all expose the same behavior -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-raspi2 in Ubuntu. https://bugs.launchpad.net/bugs/1881623 Title: USB support missing in initrd makes booting core with writable on USB impossible Status in linux-raspi package in Ubuntu: New Status in linux-raspi2 package in Ubuntu: Confirmed Status in linux-raspi2 source package in Xenial: New Status in linux-raspi2 source package in Bionic: Invalid Status in linux-raspi source package in Focal: New Bug description: when using a gadget.yaml like: volumes: pi4-system-boot: schema: mbr bootloader: u-boot structure: - type: 0C filesystem: vfat filesystem-label: system-boot size: 512M content: - source: boot-assets/ target: / pi4-usb-writable: schema: mbr structure: - name: writable type: 83 filesystem: ext4 filesystem-label: writable size: 650M role: system-data this creates two separate img files for a Pi image ... one for SD to hold the boot files, one for USB that carries the rootfs ... sadly our kernel will then not find the writable partition because it lacks support for usb disks (usb-storage seems to be there but not sufficient) adding the following to a re-built kernel snap makes everything work (verified with USB 3.1 SSD on a pi4 as well as various USB 3.0 keys) - CONFIG_ENCLOSURE_SERVICES=y - CONFIG_SCSI_SAS_ATTRS=y - CONFIG_USB_STORAGE=y - CONFIG_USB_UAS=y can we please have these either built into the kernel or added to the core initrd as modules ? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1881623/+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
