As a shot in the dark, I went through vga.c for QEMU as distributed with
Xen, located each instance of the "full_update" variable, and set it to 1.
After recompiling, instead of a blank screen when the host is waiting for
login, I get a flickering message "Waiting for display 1...".  That doesn't
seem to be the right answer...

On Tue, Apr 7, 2015 at 10:44 PM, mailing lists <theli...@gmail.com> wrote:

> Following the guide for nested virtualization here:
>
> http://wiki.xenproject.org/wiki/Nested_Virtualization_in_Xen
>
> It states that one option for display issues is to force "full update
> mode" in QEMU.  How is that done?  I can't seem to find any documentation
> on it, and in the QEMU source, full_update isn't a config option.
>
> Does it require a code patch, or is there another way?
>
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