Hello world :-) I just switched my 14-2 RELEASE AMD64 to Intel Ultra9 285K CPU (Arrow Lake) with ASUS TUF Z890 PRO WIFI motherboard, I am using NVME Samsung 9100PRO disk at PCI-E Gen5 nvme lane/slot (there is room for 3 other disks at Gen4 slots), not using onboard GPU but NVIDIA GTX1060 on main PCI-Ex16.Gen5, I have one additional PCI-Ex1 USB 3.0 controller (uPD720200) and additional 6 port SATA controller for old HDD/BD drives at PCI-Ex4. https://bsd-hardware.info/?probe=d20947a825 I have noticed some performance issues (audio and video glitches / hangs / clicks) and stability issues (i.e. all onboard USB controllers hangs randomly). Installed windoze for comparison to exclude hardware problems and the issues are not there. The partial quick-fix for this is to set PCI-Ex16 lane to 8x/8x mode and disable CPU C-States (at least below C2) in BIOS then machine is kinda usable. This is new hardware, but I realized other people have similar problems with Intel ArrowLake and a bit older AlderLake based devices, so I am opening a dedicated bug report for this issue. After some talk on mailing lists (i.e. multimedia) it turns out the audio and video glitches cause may be somewhere below and only gets hit by the problem, it is highly correlated with computer IO activity, tuning all sorts of sysctls for kern ipc vfs snd does not help. https://lists.freebsd.org/archives/freebsd-multimedia/2025-June/003107.html Some related bug reports: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263385 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237666 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285156 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=277534 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274814 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=277437 dmesg shows some problems but not sure if this is related: smbus0: <System Management Bus> on ichsmb0 acpi_wmi0: <ACPI-WMI mapping> on acpi0 acpi_wmi0: Embedded MOF found ACPI: \134AWW0.WQMO: 1 arguments were passed to a non-method ACPI object (Buffer) (20221020/nsarguments-361) acpi_wmi1: <ACPI-WMI mapping> on acpi0 acpi_wmi1: Embedded MOF found ACPI: \134ALCW.WQMO: 1 arguments were passed to a non-method ACPI object (Buffer) (20221020/nsarguments-361) acpi_wmi2: <ACPI-WMI mapping> on acpi0 acpi_wmi2: Embedded MOF found ACPI: \134RMTW.WQMO: 1 arguments were passed to a non-method ACPI object (Buffer) (20221020/nsarguments-361) acpi_wmi3: <ACPI-WMI mapping> on acpi0 acpi_wmi3: Embedded MOF found ACPI: \134ABAW.WQMO: 1 arguments were passed to a non-method ACPI object (Buffer) (20221020/nsarguments-361) acpi_wmi4: <ACPI-WMI mapping> on acpi0 acpi_wmi4: Embedded MOF found ACPI: \134AMZW.WQMO: 1 arguments were passed to a non-method ACPI object (Buffer) (20221020/nsarguments-361) acpi_wmi5: <ACPI-WMI mapping> on acpi0 acpi_wmi5: Embedded MOF found ACPI: \134_SB.WFDE.WQCC: 1 arguments were passed to a non-method ACPI object (Buffer) (20221020/nsarguments-361) acpi_wmi6: <ACPI-WMI mapping> on acpi0 acpi_wmi6: Embedded MOF found ACPI: \134_SB.WFTE.WQCC: 1 arguments were passed to a non-method ACPI object (Buffer) (20221020/nsarguments-361) ACPI Warning: \134_SB.PC00.RP01.PXSX._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20221020/nsarguments-212) Firmware Error (ACPI): Failure creating named object [\134_SB.PC00.RP01.PXSX._DSM.USRG], AE_ALREADY_EXISTS (20221020/dsfield-352) ACPI Error: AE_ALREADY_EXISTS, CreateBufferField failure (20221020/dswload2-639) ACPI Error: Aborting method \134_SB.PC00.RP01.PXSX._DSM due to previous error (AE_ALREADY_EXISTS) (20221020/psparse-689) Firmware Error (ACPI): Failure creating named object [\134_SB.PC00.RP01.PXSX._DSM.USRG], AE_ALREADY_EXISTS (20221020/dsfield-352) ACPI Error: AE_ALREADY_EXISTS, CreateBufferField failure (20221020/dswload2-639) ACPI Error: Aborting method \134_SB.PC00.RP01.PXSX._DSM due to previous error (AE_ALREADY_EXISTS) (20221020/psparse-689)