On Tue, Jul 23, 2019 at 10:50 AM Andrew Cooper wrote: > > On 23/07/2019 18:48, Roman Shaposhnik wrote: > > On Tue, Jul 23, 2019 at 10:35 AM Andrew Cooper > > wrote: > >> On 23/07/2019 18:32, Roman Shaposhnik wrote: > >>> Hi Roger! > >>> > >>> I applied your patch, removed no-igfx and I still see the original > >>> problem. Please let me know what other logs/debugs would you need at > >>> this point. > >> Please can you collect a full boot log with iommu=debug > > How long of an output should I expect when iommu=debug is enabled? > > I've just enabled it and I'm looking at what appears to be an endless > > scroll of debug info. > > > > This is all I see for the good 5 minutes at this point. Culminating with: > > (XEN) (XEN) APIC error on CPU0: 40(00) > > > > and a failure to boot. > > > > Note that this is still without no-igfx > > > > I'm attaching the tail end of this log. > > Sadly, what is useful is the head of the log, before it starts > complaining loudly about every DMA fault. No worries. Take a look at the head of the log attached. Btw, I'm kind of curious why iommu=debug would actually make it crash Thanks, Roman.