Suggest you to close look at the dmsg or log for debugging. Hope that helps and cheers.
Jerry,Refer to console=hvc0 from (https://wiki.xen.org/wiki/Xen_FAQ_Console)which is dedicated for domO after Xen kernel loaded, so if it hangs it means somewhere the booting process with xen is not right.
On Wed, May 17, 2017 at 11:26 AM, Jerry <jerryubi@xxxxxxxxx> wrote:
Howdy,I recently went through a frustrating experience trying to get Xen 4 running on a CentOS 7 system. After a fresh install, fully updating the system, rebooting, then trying to install Xen4CentOS it would fail to boot into the 4.9 kernel, sitting there with a blinking cursor indefinitely.I thought it was a failure with grub, but it turns out this was set in the grub config:GRUB_CMDLINE_LINUX_XEN_
REPLACE_DEFAULT="console=hvc0 ..."So the kernel was loading successfully, but it was failing boot properly (hanging because it couldn't find the / file system, but that's a different story). Boot messages were not being displayed on my console because of the console=hvc0 setting, hampering the troubleshooting process.What is the purpose of setting console=hvc0? I removed it so I could trouble shoot this problem, but I didn't re-add it and the system booted fine, Xen is working. Is there something that depends on this?I always disable "rhgb quiet" on a fresh install because I don't like boot messages being hidden from me, and now this other thing does it. I like details, I need the details, don't hide them from me.Thanks,Jerry
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