I'm having issues with win10 though: every time I add the Sandy Bridge "HD Graphics" driver, it crashes. But maybe this machine does not have enough physical memory.
A quick boot of an Ubuntu 20.04 ISO worked flawlessly :)
Update: I re-configured my kernel, recompiled it, and now I've got access to /dev/mem
Here is my output, doing this in real time:
root@immortality-d01b5b:~# setpci -s 0000:00:02.0 fc.l
78d0d018
Ok, that's the OpRegion i guess
Now let's check it:
root@immortality-d01b5b:~# dd bs=1...
I see, the kernel is configured, as most new kernels do, as
cat /boot/config-lts | grep CONFIG_STRICT_DEVMEM
CONFIG_STRICT_DEVMEM=y
That prevents access to /dev/mem .....seems I have to recompile it :(
I am trying your solution, but it seems I ran into another problem:
root@immortality-d01b5b:~# setpci -s 0000:00:02.0 fc.l
78d0d018
"78d0d018" is in the ACPI region:
cat /proc/iomem
00000000-00000fff : Reserved
00001000-0009ffff : System RAM
000a0000-000bffff : PCI Bus 0000:00...
I am experiencing this problem too: there's obviously some kind of quirk in HP firmware: ALL HP workstations/machines with Sandy Bridge have this problem, and I've tried three of those:
Elite 8200 usff pc
Z210 sff workstation
hp 8100
All same error in VFIO "Failed to setup Intel IGD regions"...
After a BIG struggle with this issue, I've found that sometimes, for obscure reasons, the installer of the guest agent spews out an error like:
Error: 8004E00F when trying to access COM+ Applications in Component Services
I solved this obscure issue as per Microsoft reccomendation...
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