On Wed, Dec 19, 2018 at 07:11:34PM +0100, BALATON Zoltan wrote: > On Wed, 19 Dec 2018, Daniel P. Berrangé wrote: > > On Tue, Dec 18, 2018 at 08:05:59PM +0100, BALATON Zoltan wrote: > > > On Tue, 18 Dec 2018, Daniel P. Berrangé wrote: > > > > I don't see any difference depending on whether I use Ctrl-Alt-3 before > > > > or after the yellow screen - both work as expected. The fact that you > > > > see a difference though does suggest that there's something odd being > > > > done in the ppc emulation that is in turn doing something bad to SDLs > > > > rendering with your graphics setup. I don't know what it could be > > > > though. > > > > > > OK thanks for checking this, at least it seems this is something that not > > > reproduces elsewhere so it's probably something specific to my setup. I > > > may > > > try to debug this further when I'll have time. > > > > I think there's a good chance that this is still a bug in QEMU, so > > definitely still worth trying to debug what in your setup triggers > > it. > > Looks like Howard (cc'd) also has similar issue on Fedora 29 with NVidia > vendor driver although newer version than mine so the proprietary NVidia > driver seems to be a common point here. The difference is that for him the > monitor window seems to hijack the guest screen not the serial screen like > for me but this could be the same bug. I can't easily test with nouveau > driver now so that's all we could find out so far. Also having some output > on serial window seems to be relevant as this works before client starts if > I start with qemu-system-ppc -S but breaks after continue in monitor window. > qemu-system-x86_64 also does not show the problem but maybe because there's > no content in serial window there?
qemu-system-x86_64 -machine graphics=off will make seabios print stuff to the serial line. cheers, Gerd