Hi, It doesn't matter if i boot with acpi_osi=!Linux I still get the message: ACPI: System BIOS is requesting _OSI(Linux) ACPI: Please test with "acpi_osi=!Linux" Below is the output of dmidecode for this laptop # dmidecode 2.9 SMBIOS 2.4 present. 17 structures occupying 710 bytes. Table at 0x000DC010. Handle 0x0000, DMI type 0, 24 bytes BIOS Information Vendor: Phoenix Technologies LTD Version: R0050J7 Release Date: 04/18/2007 Address: 0xE62C0 Runtime Size: 105792 bytes ROM Size: 1024 kB Characteristics: PCI is supported PNP is supported BIOS is upgradeable BIOS shadowing is allowed ESCD support is available Boot from CD is supported Selectable boot is supported EDD is supported 8042 keyboard services are supported (int 9h) CGA/mono video services are supported (int 10h) ACPI is supported USB legacy is supported AGP is supported Smart battery is supported BIOS boot specification is supported Function key-initiated network boot is supported Targeted content distribution is supported BIOS Revision: 5.0 Firmware Revision: 5.0 Handle 0x0001, DMI type 1, 27 bytes System Information Manufacturer: Sony Corporation Product Name: VGN-FZ11M Version: C3LP8MZ3 Serial Number: 28201150-5000954 UUID: 25BBA8A0-08D1-11DC-874E-0013A9C09B3B Wake-up Type: Power Switch SKU Number: N/A Family: N/A Handle 0x0002, DMI type 2, 10 bytes Base Board Information Manufacturer: Sony Corporation Product Name: VAIO Version: N/A Serial Number: N/A Handle 0x0003, DMI type 3, 17 bytes Chassis Information Manufacturer: Sony Corporation Type: Notebook Lock: Not Present Version: N/A Serial Number: N/A Asset Tag: N/A Boot-up State: Safe Power Supply State: Safe Thermal State: Safe Security Status: None OEM Information: 0x00000000 Handle 0x0004, DMI type 4, 35 bytes Processor Information Socket Designation: N/A Type: Central Processor Family: Other Manufacturer: GenuineIntel ID: FD 06 00 00 FF FB EB BF Version: Intel(R) Core(TM)2 Duo CPU T7100 @ 1.80GHz Voltage: 1.2 V External Clock: 200 MHz Max Speed: 1800 MHz Current Speed: 1800 MHz Status: Populated, Enabled Upgrade: None L1 Cache Handle: 0x0005 L2 Cache Handle: 0x0006 L3 Cache Handle: 0x0007 Serial Number: N/A Asset Tag: N/A Part Number: N/A Handle 0x0005, DMI type 7, 19 bytes Cache Information Socket Designation: L1 Cache Configuration: Enabled, Socketed, Level 1 Operational Mode: Write Back Location: Internal Installed Size: 64 KB Maximum Size: 64 KB Supported SRAM Types: Burst Pipeline Burst Asynchronous Installed SRAM Type: Other Speed: Unknown Error Correction Type: Single-bit ECC System Type: Data Associativity: 8-way Set-associative Handle 0x0006, DMI type 7, 19 bytes Cache Information Socket Designation: L2 Cache Configuration: Enabled, Socketed, Level 2 Operational Mode: Write Back Location: Internal Installed Size: 2048 KB Maximum Size: 2048 KB Supported SRAM Types: Burst Pipeline Burst Asynchronous Installed SRAM Type: Burst Speed: Unknown Error Correction Type: Single-bit ECC System Type: Unified Associativity: 8-way Set-associative Handle 0x0007, DMI type 7, 19 bytes Cache Information Socket Designation: L3 Cache Configuration: Disabled, Not Socketed, Level 3 Operational Mode: Unknown Location: Unknown Installed Size: 0 KB Maximum Size: 0 KB Supported SRAM Types: Burst Pipeline Burst Asynchronous Installed SRAM Type: Unknown Speed: Unknown Error Correction Type: Unknown System Type: Unknown Associativity: Unknown Handle 0x0008, DMI type 11, 5 bytes OEM Strings String 1: JPBL-003584 String 2: FNC-CCIA0sodEXTB String 3: 381M0000000075257818136C5D53 String 4: Reserved String 5: Reserved Handle 0x0009, DMI type 16, 15 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 2048 GB Error Information Handle: Not Provided Number Of Devices: 2 Handle 0x000A, DMI type 17, 21 bytes Memory Device Array Handle: 0x0009 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 1024 MB Form Factor: SODIMM Set: None Locator: SODIMM1 Bank Locator: Bank 0 Type: DDR2 Type Detail: Unknown Handle 0x000B, DMI type 17, 21 bytes Memory Device Array Handle: 0x0009 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 1024 MB Form Factor: SODIMM Set: None Locator: SODIMM2 Bank Locator: Bank 1 Type: DDR2 Type Detail: Unknown Handle 0x000C, DMI type 19, 15 bytes Memory Array Mapped Address Starting Address: 0x00000000000 Ending Address: 0x0007FFFFFFF Range Size: 2 GB Physical Array Handle: 0x0009 Partition Width: 0 Handle 0x000D, DMI type 20, 19 bytes Memory Device Mapped Address Starting Address: 0x00000000000 Ending Address: 0x0003FFFFFFF Range Size: 1 GB Physical Device Handle: 0x000A Memory Array Mapped Address Handle: 0x000C Partition Row Position: Unknown Interleave Position: Unknown Interleaved Data Depth: Unknown Handle 0x000E, DMI type 20, 19 bytes Memory Device Mapped Address Starting Address: 0x00040000000 Ending Address: 0x0007FFFFFFF Range Size: 1 GB Physical Device Handle: 0x000B Memory Array Mapped Address Handle: 0x000C Partition Row Position: Unknown Interleave Position: Unknown Interleaved Data Depth: Unknown Handle 0x000F, DMI type 32, 20 bytes System Boot Information Status: No errors detected Handle 0x0010, DMI type 127, 4 bytes End Of Table - 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