···179179180180 See also Documentation/power/runtime_pm.txt, pci=noacpi181181182182- acpi_rsdp= [ACPI,EFI,KEXEC]183183- Pass the RSDP address to the kernel, mostly used184184- on machines running EFI runtime service to boot the185185- second kernel for kdump.186186-187182 acpi_apic_instance= [ACPI, IOAPIC]188183 Format: <int>189184 2: use 2nd APIC table, if available···191196 If set to vendor, prefer vendor specific driver192197 (e.g. thinkpad_acpi, sony_acpi, etc.) instead193198 of the ACPI video.ko driver.199199+200200+ acpica_no_return_repair [HW, ACPI]201201+ Disable AML predefined validation mechanism202202+ This mechanism can repair the evaluation result to make203203+ the return objects more ACPI specification compliant.204204+ This option is useful for developers to identify the205205+ root cause of an AML interpreter issue when the issue206206+ has something to do with the repair mechanism.194207195208 acpi.debug_layer= [HW,ACPI,ACPI_DEBUG]196209 acpi.debug_level= [HW,ACPI,ACPI_DEBUG]···228225 unusable. The "log_buf_len" parameter may be useful229226 if you need to capture more output.230227228228+ acpi_enforce_resources= [ACPI]229229+ { strict | lax | no }230230+ Check for resource conflicts between native drivers231231+ and ACPI OperationRegions (SystemIO and SystemMemory232232+ only). IO ports and memory declared in ACPI might be233233+ used by the ACPI subsystem in arbitrary AML code and234234+ can interfere with legacy drivers.235235+ strict (default): access to resources claimed by ACPI236236+ is denied; legacy drivers trying to access reserved237237+ resources will fail to bind to device using them.238238+ lax: access to resources claimed by ACPI is allowed;239239+ legacy drivers trying to access reserved resources240240+ will bind successfully but a warning message is logged.241241+ no: ACPI OperationRegions are not marked as reserved,242242+ no further checks are performed.243243+231244 acpi_force_table_verification [HW,ACPI]232245 Enable table checksum verification during early stage.233246 By default, this is disabled due to x86 early mapping···272253 This feature is enabled by default.273254 This option allows to turn off the feature.274255256256+ acpi_no_memhotplug [ACPI] Disable memory hotplug. Useful for kdump257257+ kernels.258258+275259 acpi_no_static_ssdt [HW,ACPI]276260 Disable installation of static SSDTs at early boot time277261 By default, SSDTs contained in the RSDT/XSDT will be···285263 dynamic table installation which will install SSDT286264 tables to /sys/firmware/acpi/tables/dynamic.287265288288- acpica_no_return_repair [HW, ACPI]289289- Disable AML predefined validation mechanism290290- This mechanism can repair the evaluation result to make291291- the return objects more ACPI specification compliant.292292- This option is useful for developers to identify the293293- root cause of an AML interpreter issue when the issue294294- has something to do with the repair mechanism.266266+ acpi_rsdp= [ACPI,EFI,KEXEC]267267+ Pass the RSDP address to the kernel, mostly used268268+ on machines running EFI runtime service to boot the269269+ second kernel for kdump.295270296271 acpi_os_name= [HW,ACPI] Tell ACPI BIOS the name of the OS297272 Format: To spoof as Windows 98: ="Microsoft Windows"···383364 acpi_use_timer_override [HW,ACPI]384365 Use timer override. For some broken Nvidia NF5 boards385366 that require a timer override, but don't have HPET386386-387387- acpi_enforce_resources= [ACPI]388388- { strict | lax | no }389389- Check for resource conflicts between native drivers390390- and ACPI OperationRegions (SystemIO and SystemMemory391391- only). IO ports and memory declared in ACPI might be392392- used by the ACPI subsystem in arbitrary AML code and393393- can interfere with legacy drivers.394394- strict (default): access to resources claimed by ACPI395395- is denied; legacy drivers trying to access reserved396396- resources will fail to bind to device using them.397397- lax: access to resources claimed by ACPI is allowed;398398- legacy drivers trying to access reserved resources399399- will bind successfully but a warning message is logged.400400- no: ACPI OperationRegions are not marked as reserved,401401- no further checks are performed.402402-403403- acpi_no_memhotplug [ACPI] Disable memory hotplug. Useful for kdump404404- kernels.405367406368 add_efi_memmap [EFI; X86] Include EFI memory map in407369 kernel's map of available physical RAM.