[Libguestfs] [PATCH] lib: direct: Remove use of sga

Daniel P. Berrangé berrange at redhat.com
Thu Sep 9 11:22:50 UTC 2021

On Wed, Sep 08, 2021 at 04:42:05PM +0100, Richard W.M. Jones wrote:
> sga (or "sgabios" or "Serial Graphics Adapter") is an option ROM for
> seabios which directs output to the serial adapter.  This is very
> useful for debugging BIOS problems during boot.
> RHEL wants to deprecate this feature (in fact, they just deprecated it
> without telling us).  However there is an equivalent feature now in
> seabios which can be enabled using either -nographic or
> -machine graphics=off

FWIW, this is available since SeaBIOS 1.11, bundled with
QEMU 2.11.0 which is the minimum libvirt supports these
days. I presume libguestfs min version exceeds that ?

> This commit removes sga and enables -machine graphics=off in the
> direct backend.
> (We cannot do the same for the libvirt backend because libvirt has no
> feature to implement this yet).

You likely won't need any changes to libvirt side. Once I fully confirm
that it has no impact on live migration, we'll transparentely update
libvirt to use the new syntax.

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