If BIOS invokes _OSI(Linux), the kernel response depends on what the ACPI DMI list knows about the system, and that is reflectd in dmesg: 1) System unknown to DMI: ACPI: BIOS _OSI(Linux) query ignored ACPI: DMI System Vendor: LENOVO ACPI: DMI Product Name: 7661W1P ACPI: DMI Product Version: ThinkPad T61 ACPI: DMI Board Name: 7661W1P ACPI: DMI BIOS Vendor: LENOVO ACPI: DMI BIOS Date: 10/18/2007 ACPI: Please send DMI info above to linux-acpi@vger.kernel.org ACPI: If "acpi_osi=Linux" works better, please notify linux-acpi@vger.kernel.org 2) System known to DMI, but effect of OSI(Linux) unknown: ACPI: DMI detected: Lenovo ThinkPad T61 ... ACPI: BIOS _OSI(Linux) query ignored via DMI ACPI: If "acpi_osi=Linux" works better, please notify linux-acpi@vger.kernel.org 3) System known to DMI, which disables _OSI(Linux): ACPI: DMI detected: Lenovo ThinkPad T61 ... ACPI: BIOS _OSI(Linux) query ignored via DMI 4) System known to DMI, which enable _OSI(Linux): ACPI: DMI detected: Lenovo ThinkPad T61 ACPI: Added _OSI(Linux) ... ACPI: BIOS _OSI(Linux) query honored via DMI cmdline overrides take precidence over the built-in default and the DMI prescribed default. cmdline "acpi_osi=Linux" results in: ACPI: BIOS _OSI(Linux) query honored via cmdline
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| @@ -40,6 +40,7 @@ · 39 unmodified lines | ||
| 40 | 40 | #include <acpi/acpi_drivers.h> |
| 41 | 41 | #include <acpi/acpi_numa.h> |
| 42 | 42 | #include <asm/acpi.h> |
| 43 | +#include <linux/dmi.h> | |
| 43 | 44 | |
| 44 | 45 | |
| 45 | 46 | #ifdef CONFIG_ACPI |
| @@ -192,7 +193,9 @@ extern int ec_transaction(u8 command, · 146 unmodified lines | ||
| 192 | 193 | #endif /*CONFIG_ACPI_EC*/ |
| 193 | 194 | |
| 194 | 195 | extern int acpi_blacklisted(void); |
| 195 | −extern void acpi_bios_year(char *s); | |
| 196 | +#ifdef CONFIG_DMI | |
| 197 | +extern void acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d); | |
| 198 | +#endif | |
| 196 | 199 | |
| 197 | 200 | #ifdef CONFIG_ACPI_NUMA |
| 198 | 201 | int acpi_get_pxm(acpi_handle handle); |
| @@ -226,5 +229,5 @@ static inline int acpi_boot_table_init(void) · 27 unmodified lines | ||
| 226 | 229 | return 0; |
| 227 | 230 | } |
| 228 | 231 | |
| 229 | −#endif /* CONFIG_ACPI */ | |
| 232 | +#endif /* !CONFIG_ACPI */ | |
| 230 | 233 | #endif /*_LINUX_ACPI_H*/ |