Re: [Xen-devel] [qemu-upstream-unstable test] 21375: regressions - FAIL

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2013-11-01 at 11:58 +0000, Anthony PERARD wrote:
> On Fri, Nov 01, 2013 at 10:43:16AM +0000, Ian Campbell wrote:
> > On Fri, 2013-11-01 at 10:38 +0000, xen.org wrote:
> > > flight 21375 qemu-upstream-unstable real [real]
> > > http://www.chiark.greenend.org.uk/~xensrcts/logs/21375/
> > > 
> > > Regressions :-(
> > > 
> > > Tests which did not succeed and are blocking,
> > > including tests which could not be run:
> > >  test-amd64-i386-qemuu-rhel6hvm-intel  7 redhat-install    fail REGR. vs. 
> > > 20054
> > 
> > Anythony, have you made any progress on this? It's been failing for ages
> > now...
> 
> Yes, looks like the bug it trigger during a vesa resolution change. I
> have try to use the vgabios blob that we use for qemu-traditionnal and
> it works fine. But with the vgabios blob provided by qemu, it does not
> work... I'm still not sure of what the bug is, but I'm getting closer to
> it.

Yay!

> Also, this happen only on an Intel machine, on an AMD machine,
> everything works like a charm.
> 
> More detail, if anyone want to know:
> It's look like syslinux is doing a int 10h call that never return to set
> video mode:
> Int 0x10, with AX=0x4F02

This looks like it might be handled by SeaBIOS vgasrc/vbe.c:vbe_104f00 ?
There seem to be a few changes in upstream seabios since the version
referenced in xen.git:Config.mk. Many of them are cleanups/code motion
but a few look worth investigating. 

Ian.


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