Fixing DRIVER_POWER_STATE_FAILURE (0x9F) on resume from sleep — ASMedia ASM4242 USB4 on ASUS PRIME X870-P WIFI (Windows 11 Home)
Keywords for search: 0x9F_3_ACPI_IMAGE_pci.sys · Usb4HostRouter.sys · _SB.PCI0.GPP8.U4UP · ASM4242 · ASMx4242_FWUpdateV40014 · read hardware IO fail · load IO driver fail · asmfilter64 · \\.\ASMFITER · ASUS 4242 and PD-GX Firmware Windows Update Tool · PD_UPDATE_TOOL_V0206 · X870 · AM5 · USB4 · sleep · S3 · Windows 11 Home · pnputil /remove-device not supported
Written 2026‑08‑23. Outcome: firmware flashed; monitoring. Will update if the crash recurs.