[Bug 224557] [acpi] FreeBSD 12-CURRENT r327038 on Dell Inspiron 7352: Reboot results in blank screen

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224557

            Bug ID: 224557
           Summary: [acpi] FreeBSD 12-CURRENT r327038 on Dell Inspiron
                    7352: Reboot results in blank screen
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: neel at neelc.org

When I boot FreeBSD 12-CURRENT r327038 on a Dell Inspiron 7352 (i7-5500U, 8GB
DDR3) and reboot, the screen lights up but ends up blank and not showing
anything. This bug exists in both UEFI and Legacy mode, and existed as early as
9.1-RELEASE. Keep in mind that I have an aftermarket SSD (SanDisk X400 512GB
2.5") in this laptop. I also have this issue when booting from USB. Shutdowns
work fine.

Another laptop, a HP EliteBook Folio 1040 G1 (which is my primary FreeBSD
machine) also has a SanDisk M.2 SSD (SD6SN1M-256G-1006) although this SanDisk
is a HP OEM part, and the 1040 not have this issue.

My desktop (homebuilt, Asus H87M-E motherboard) also has a SanDisk SSD
(ReadyCache 64GB, don't remember exact model number) used for a ZFS cache, and
the desktop does not have any problems with FreeBSD reboots either.

All 3 systems have UEFI with Secure Boot disabled and CSM enabled (in a hybrid
UEFI/BIOS mode).

Keep in mind that both laptops and the desktop are personal (i.e. owned by me),
the Dell is used for schoolwork and internship and the HP is used for personal
stuff (including Port maintenance). I am hoping that I can use FreeBSD for my
schoolwork as well instead of Linux and don't want to use my EliteBook for
schoolwork.

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