I checked and secure boot is turned off.
Jonathan brings it exactly to the point: we have to face UEFI because
legacy mode is fading out, if I enable legacy mode I can't even boot
anymore through the network (PXE) as these newer network cards can
only boot PXE with UEFI.
In the mean time I have installed Ubuntu 17.10 with Xen and I was
lucky to see that this combination works with UEFI even Xen.
On Wed, Jan 31, 2018 at 2:12 PM, Johnny Hughes <johnny@xxxxxxxxxx> wrote:
> On 01/30/2018 04:23 PM, John Naggets wrote:
>> Hi,
>>
>> I installed CentOS 7.4 on a modern Lenovo ThinkSystem SR630 server
>> which uses UEFI. So far so good CentOS 7.4 works fine so then I went
>> on to install the Xen hypervisor by following the instructions from
>> the wiki (https://wiki.centos.org/HowTos/Xen/Xen4QuickStart).
>>
>> Unfortunately when I reboot after having installed the xen package the
>> system does not boot into "CentOS Linux, with Xen hypervisor" from the
>> grub menu prompt. I get the following error:
>>
>> Loading Xen 4.6.6-8.el7 ...
>> error: can't find command `multiboot'.
>> Loading Linux 4.9.75-29.el7.x86_64 ...
>> error: can't find command `module'.
>> Loading initial ramdisk ...
>> error: can't find command `module'.
>>
>> Press any key to continue...
>>
>> The problem which I encounter here is exactly the same issue as
>> described for Fedora in the RedHat bugs:
>> https://bugzilla.redhat.com/show_bug.cgi?id=1286317 with the exception
>> that for me it's CentOS 7.4 and that the workarounds as described in
>> that bug do not work.
>>
>> Does anyone know how I can make my CentOS boot with the Xen hypervisor
>> using UEFI?
>>
>> Thank you very much for your help.
>>
>
> Usually not an issue with UEFI .. but with Secure Boot
>
> You need to make sure Secure Boot is off. It is sometimes called Legacy
> Booting turned on, etc.
>
>
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