June 29, 20179 yr Firstly, I apologize if this is the wrong section to post. Perhaps the post belongs in the rc6 release thread. Someone please let me know if that's the case. When I upgraded to 6.4 rc6 from 6.3.5, the first thing I did was enable UEFI booting, and returned my server to UEFI booting. I also enabled https with the config/go hack. Both of these appear to be working just fine. The problems I'm having are with my VMs, specifically my Linux (Ubuntu 17.04) VMs. I also have 2 Windows VMs that do not exhibit any issues. Issue #1) Network adapter names for all VMs changed. This caused obvious connectivity loss to VMs. Windows picked up on the change and adjusted automatically, Ubuntu did not. Needed to get interface name with sudo ifconfig -a, then edit /etc/network/interfaces with the new name. Now works fine. Did I miss something in the change notes that this would need to be done? Issue #2) I can no longer boot my Ubuntu VMs using disk type "VirtIO" after changing to Qemu 2.9. I installed them as VirtIO, and ran them fine, until I messed with the Qemu version. At that point, even returning it to the original value of 2.7 still didn't work. What happens is it drops me into the EFI shell, with the error "no maps found", which prevents me from manually booting from the efi file. Swapping to SATA disk type seems to have resolved the problem. My Windows VMs were updated from i440fx 2.7 to i440fx 2.9, and did not exhibit this issue (they are also VirtIO). Booted and working fine? Anyone have any ideas on this one? Edited June 29, 20179 yr by Aerowinder
July 7, 20178 yr Confirmed #2. Updated QEMU to 2.9 in a couple of my Ubuntu VMs and they gave me the same "no maps found" error. I haven't been able to recover them by switching to SATA however. Something happens when you edit the VM in the GUI. I recreated by creating a new VM then replacing everything except the UUID in XML editor with a working VM's XML (Working VM has no custom edits). VM booted normally. Entered the GUI edit page and just saved without making changes. Afterwards I would get the UEFI boot menu with error "no maps found"
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