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Subject: bug#40590:
Date: Sat, 18 Apr 2020 13:47:11 -0400
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To: Mathieu Othacehe <m.othacehe@gmail.com>
Cc: 40590@debbugs.gnu.org

Sorry for the late reply on this.

> Could you try adding the following kernel parameters (via Grub 
> by
> pressing 'e', then appending the option at the end of the 
> cmdline):
>
> * nomodeset
>
> and if it doesn't work:
>
> * amd_iommu=pt ivrs_ioapic[32]=00:14.0 iommu=soft

The amd option didn't work, but nomodeset allowed me to get to a 
shell,
at which point I could start experimenting with various settings 
to see
if I could get a graphical environment. I finally did by switching 
over
to the proprietary kernel (which points to a graphical driver 
issue with
AMD Navi cards in the libre kernel), but that's obviously less 
than ideal.

Still, it means I can finally start using the system in 
earnest. Thanks
for all your help!