Comment 21 for bug 1804577

The same bug affects me as well.
MainBoard: Gigabyte AB350-Gaming-CF
CPU: Amd Ryzen 5 2400G
Kernel: 5.1.15-050115-generic (updated via UKUU).
lshw attached.

[Fri Aug 2 09:44:25 2019] ACPI: Added _OSI(Processor Aggregator Device)
[Fri Aug 2 09:44:25 2019] ACPI: Added _OSI(Linux-Dell-Video)
[Fri Aug 2 09:44:25 2019] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[Fri Aug 2 09:44:25 2019] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)
[Fri Aug 2 09:44:25 2019] ACPI BIOS Error (bug): Failure creating named object [\_SB.SMIC], AE_ALREADY_EXISTS (20190215/dswload2-324)
[Fri Aug 2 09:44:25 2019] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20190215/psobject-221)
[Fri Aug 2 09:44:25 2019] ACPI BIOS Error (bug): Failure creating named object [\_SB.SMIB], AE_ALREADY_EXISTS (20190215/dsfield-633)
[Fri Aug 2 09:44:25 2019] ACPI: 8 ACPI AML tables successfully acquired and loaded
[Fri Aug 2 09:44:25 2019] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[Fri Aug 2 09:44:25 2019] ACPI: Interpreter enabled
[Fri Aug 2 09:44:25 2019] ACPI: (supports S0 S3 S4 S5)
[Fri Aug 2 09:44:25 2019] ACPI: Using IOAPIC for interrupt routing
[Fri Aug 2 09:44:25 2019] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[Fri Aug 2 09:44:25 2019] ACPI: Enabled 2 GPEs in block 00 to 1F
[Fri Aug 2 09:44:25 2019] ACPI: Power Resource [P0ST] (on)
[Fri Aug 2 09:44:25 2019] ACPI: Power Resource [P3ST] (on)
[Fri Aug 2 09:44:25 2019] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[Fri Aug 2 09:44:25 2019] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI]
[Fri Aug 2 09:44:25 2019] acpi PNP0A08:00: _OSC: platform does not support [SHPCHotplug LTR]
[Fri Aug 2 09:44:25 2019] acpi PNP0A08:00: _OSC: OS now controls [PCIeHotplug PME AER PCIeCapability]
[Fri Aug 2 09:44:25 2019] acpi PNP0A08:00: [Firmware Info]: MMCONFIG for domain 0000 [bus 00-3f] only partially covers this bridge
[Fri Aug 2 09:44:25 2019] PCI host bridge to bus 0000:00