hello, Referencing this report against kernel-5.3 and xen-4.9.2: https://bugs.launchpad.net/ubuntu/+source/xen/+bug/1851091
I see the same behavior with the hypervisor from xen-4.12.x and xen-4.13.0. Using legacy bios, boot never starts and host resets. Adding more: If I copy into Focal /boot the hypervisor built in Buster or ub19.04, using the same d/rules*, everything works. I've built the xen hypervisor with gcc8 or gcc9, with or without PIE, and behavior is the same. However, I've noticed that all hypervisors have 3 LZ4 blobs. The 2 working versions have the same first blob size at (0F 85 5B 01), slightly smaller than the Focal blob size (0F 85 5C 01). I count Lz4 blobs looking for ( 02 21 4C 18). I cannot test an EFI boot, but the launchpad report says EFI works in ub19.10. cheers, PryMar56 ##xen-packaging on Freenode IRC _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel