On Thu, 2022-11-10 at 14:58 +0100, daggs wrote:
> > On Thu, 2022-11-10 at 18:48 +0500, Roman Mamedov wrote:
> > > On Thu, 10 Nov 2022 13:43:56 +0000
> > > Patrick O'Callaghan <p...@usb.ve> wrote:
> > > 
> > > > I've just replaced an old Nvidia card with a newer AMD RX580
> > > > and am
> > > > attempting to reconfigure my Windows VM. However I don't see
> > > > the
> > > > new
> > > > card getting its own IOMMU group:
> > > > 
> > > > $ ls /sys/kernel/iommu_groups
> > > > $
> > > 
> > > Looks like you don't have any IOMMU groups at all. Was GPU
> > > passthrough working
> > > before, on this exact system? Without OS reinstalls, kernel
> > > upgrades
> > > and
> > > without resetting the BIOS settings to defaults?
> > > 
> > 
> > Passthrough was working with the Nvidia card, which did have its
> > own
> > IOMMU group. However it's been some time (months) since I last used
> > it,
> > so it's possible that something else has changed as I do update my
> > system frequently (using Fedora dnf from standard repos).
> > 
> > Other than the GPU, all the hardware is identical, and I haven't
> > touched any BIOS settings.
> > 
> > poc
> > 
> 
> maybe the GPU swap caused the bios to revert to default settings, I
> suggest verifying it

I haven't changed the default settings.

poc

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