Both problems persist on 20200522.0.0, here is the kernel panic and reboot:
[ 0.883971] VFS: Cannot open root device "PARTUUID=43931bda-01" or unknown-block(0,0): error -6 [ 0.885744] Please append a correct "root=" boot option; here are the available partitions: [ 0.887371] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [ 0.888956] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.4.0-31-generic #35-Ubuntu [ 0.890427] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 0.891863] Call Trace: [ 0.892322] dump_stack+0x6d/0x9a [ 0.892865] panic+0x101/0x2e3 [ 0.893466] mount_block_root+0x23f/0x2e8 [ 0.894322] mount_root+0x38/0x3a [ 0.894984] prepare_namespace+0x13f/0x194 [ 0.895776] kernel_init_freeable+0x231/0x255 [ 0.896743] ? rest_init+0xb0/0xb0 [ 0.897499] kernel_init+0xe/0x100 [ 0.898283] ret_from_fork+0x35/0x40 [ 0.899058] Kernel Offset: 0x32400000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 0.900974] ACPI MEMORY or I/O RESET_REG. [ 0.000000] Linux version 5.4.0-31-generic (buildd@lgw01-amd64-059) (gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)) #35-Ubuntu SMP Thu May 7 20:20:34 UTC 2020 (Ubuntu 5.4.0-31.35-generic 5.4.34) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1874453 Title: ubuntu/focal64 very slow to boot and reboots once To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/1874453/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs