I randomly picked another ARM server, a Cavium ThunderX system, and it also fails to net boot w/ jammy's GRUB, but works fine w/ the patch in comment #16. So this is looking like possibly an architecture-wide issue. I tested on an x86 VM, but I didn't see any of the LoadFile2 messages. I assume (didn't check the code) that LoadFile2 initramfs is disabled there.
** Changed in: grub2-unsigned (Ubuntu) Importance: Undecided => High ** Changed in: linux (Ubuntu) Assignee: dann frazier (dannf) => (unassigned) -- 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/1967562 Title: jammy beta (220330) arm iso pxe boot kernel panic on Ampere Mt. Jade Status in grub2-unsigned package in Ubuntu: New Status in linux package in Ubuntu: Incomplete Status in subiquity package in Ubuntu: Invalid Bug description: = Description = Platforms: Ampere Mt. Jade Altra (bizzy), Cavium thunderX crb2s (recht) Image: Jammy Beta (220330) I setup my pxe server to provision jammy beta and got the following kernel panic message after grub stage: log from console log [ 1.176614] integrity: Couldn't parse dbx signatures: -74^M [ 1.371630] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)^M [ 1.379891] CPU: 42 PID: 1 Comm: swapper/0 Not tainted 5.15.0-23-generic #23-Ubuntu^M [ 1.387535] Hardware name: WIWYNN Mt.Jade Server System B81.030Z1.0007/Mt.Jade Motherboard, BIOS 1.6.20210526 (SCP: 1.06.20210526) 2021/05/26^M [ 1.400215] Call trace:^M [ 1.402649] dump_backtrace+0x0/0x1ec^M [ 1.406310] show_stack+0x24/0x30^M [ 1.409614] dump_stack_lvl+0x68/0x84^M [ 1.413271] dump_stack+0x18/0x34^M [ 1.416573] panic+0x18c/0x39c^M [ 1.419616] mount_block_root+0x160/0x210^M [ 1.423622] mount_root+0x12c/0x14c^M [ 1.427097] prepare_namespace+0x140/0x1a0^M [ 1.431182] kernel_init_freeable+0x1c8/0x214^M [ 1.435527] kernel_init+0x30/0x160^M [ 1.439006] ret_from_fork+0x10/0x20^M [ 1.442573] SMP: stopping secondary CPUs^M [ 1.447323] Kernel Offset: 0x55263ee90000 from 0xffff800008000000^M [ 1.453404] PHYS_OFFSET: 0x80000000^M [ 1.456879] CPU features: 0x000085c1,a3302e42^M [ 1.461225] Memory Limit: none^M [ 1.464271] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---^M = Steps to Reproduce = 1. Followed this guide to setup the pxe server https://discourse.ubuntu.com/t/netbooting-the-live-server-installer-via-uefi-pxe-on-arm-aarch64-arm64-and-x86-64-amd64/19240 with the jammy beta image (220330) http://cdimage.ubuntu.com/ubuntu-server/daily-live/20220330/jammy-live-server-arm64.iso 1-1. You may use this script to perform the set-up https://github.com/tai271828/ubuntu-autoinstall-pxe-server by invoking: `sudo ./setup-pxe-server.sh --url http://cdimage.ubuntu.com/ubuntu-server/daily-live/20220330/jammy-live-server-arm64.iso` 2. Boot the system via PXE 3. Select Ubuntu at Grub menu = Expected Result = The image is loaded to the system locally via PXE, and subiquity is launched = Actual Result = Console log simply shows nothing for 10 seconds and then the kernel panic shows up. = Additional Information = - If we install via the virtual CD of the server, subiquity could be launched and the installation process completes successfully. - MAAS could deploy Jammy to the Mt. Jade server as well. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2-unsigned/+bug/1967562/+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