here is the reason why ARM64 U-boot isn't effected by this issue, and why APM Mustang with UEFI will be effected. I'm not sure MAAS install this kind of machine will start from cloud-img with existing kernel and initrd.img or not.
Here is the curtin process in installation ISO right now. 1. Determine U-boot/UEFI in arm/arm64 environment. 1.a. If need, install flash-kernel in this stage. 2. Omit something 3. Disable `update-initramfs`. 3.a. This will also disable flash-kernel in /target with ARM64 4. Omit something 5. Install kernel 5.a. this will install kernel with recommended package 5.b. in arm64, this will install flash-kernel So in arm64 UEFI, 1. Determine U-boot/UEFI in arm/arm64 environment. 1.a. Install flash-kernel because system is under U-boot [correct] 2. Omit something 3. Disable `update-initramfs`. 3.a. Disable flash-kernel because moonshot is under U-boot [correct] 4. Omit something 5. Install kernel 5.a. this will install kernel with recommended package 5.b. in arm64, this will install flash-kernel 5.c. System already installed flash-kernel and disable it in previous stage, so this system will not be effected by this issue. [correct] In APM Mustang with UEFI, 1. Determine U-boot/UEFI in arm/arm64 environment. 1.a. Will not install flash-kernel because mustang is under UEFI [correct] 2. Omit something 3. Disable `update-initramfs`. 3.a. Will not disable flash-kernel because mustang is under UEFI and flash-kernel isn't installed. [correct] 4. Omit something 5. Install kernel 5.a. this will install kernel with recommended package 5.b. in arm64, this will install flash-kernel [Unexpected] 5.c. System will install flash-kernel. and flash-kernel isn't disabled in previous stage. APM mustang is in flash-kernel supported list. FATAL error here. [Unexpected, fatal] In Other ARM64 UEFI platform, 1. Determine U-boot/UEFI in arm/arm64 environment. 1.a. Will not install flash-kernel because system is under UEFI [correct] 2. Omit something 3. Disable `update-initramfs`. 3.a. Will not disable flash-kernel because system is under UEFI and flash-kernel isn't installed. [correct] 4. Omit something 5. Install kernel 5.a. this will install kernel with recommended package 5.b. in arm64, this will install flash-kernel [Unexpected] 5.c. System will install flash-kernel. and flash-kernel isn't disabled in previous stage. But flash-kernel will skip because those platforms aren't in supported list. So NO FATAL error here. [Unexpected, no fatal] Because of these, dpkg-divert doesn't always work as expected. This bug might occurs again when someone add new platform into flash-kernel and that platform support UEFI and U-Boot both in the future. By the way, I patch curtin during starting installation ISO with Patch-1, it will never install flash-kernel and install system as expected. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1918427 Title: curtin: install flash-kernel in arm64 UEFI unexpected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/curtin/+bug/1918427/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
