Bug ID: 198877
           Summary: Lot of ACPI Errors (AE_NOT_FOUND) on Dell XPS 15 9550
                    with newer BIOS
           Product: ACPI
           Version: 2.5
    Kernel Version: 4.15.3
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: ACPICA-Core
        Regression: No

Created attachment 274343
kernel 4.15.3 dmesg output on Dell XPS 15 9550 with BIOS 1.6.1

Lots of ACPI errors started happening after I updated the BIOS on my Dell XPS
15. I skipped quite a few updates so am not sure which one started the issue.
For the same reason I'm not sure if there was a working kernel and an update
started showing the issue. However I'm 100% this started showing after a BIOS
update as I can see the errors printed during boot. Now I updated to BIOS 1.6.1
which contains the fixes for Spectre and Meltdown (so quite an important one)
and the issue is still present. Since downgrade is not an option anymore due to
the security issues (including also the Intel ME one from few months ago), I'm
reporting it here.

OS is Fedora 27

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