dmesg output: ACPI: Please test with "acpi_osi=!Linux" After adding this setting to kernel parameter demsg shows the following lines during next boot (dmesg|grep acpi) noname:~ # dmesg |grep acpi ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled) ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1]) ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1]) Kernel command line: acpi_osi=!Linux root=/dev/disk/by-id/scsi-SATA_WDC_WD2500BEVS-_WD-WXC308218316-part7 vga=0x314 resume=/dev/sda5 splash=silent ACPI: Please test with "acpi_osi=!Linux" Please send dmidecode to linux-acpi@xxxxxxxxxxxxxxx So here is the dmidecode output: # dmidecode 2.9 SMBIOS 2.4 present. 19 structures occupying 726 bytes. Table at 0x000DF010. Handle 0x0000, DMI type 0, 24 bytes BIOS Information Vendor: Hewlett-Packard Version: F.2F Release Date: 04/23/2008 Address: 0xE69E0 Runtime Size: 103968 bytes ROM Size: 1024 kB Characteristics: ISA is supported 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 Print screen service is supported (int 5h) 8042 keyboard services are supported (int 9h) Serial services are supported (int 14h) Printer services are supported (int 17h) ACPI is supported USB legacy is supported AGP is supported Smart battery is supported Targeted content distribution is supported Handle 0x0001, DMI type 1, 27 bytes System Information Manufacturer: Hewlett-Packard Product Name: HP Pavilion dv6700 Notebook PC Version: Rev 1 Serial Number: CNF8183F12 UUID: 434E4638-3138-3346-3132-001E68667BDD Wake-up Type: Power Switch SKU Number: FF746EA#ABD Family: 103C_5335KV Handle 0x0002, DMI type 2, 8 bytes Base Board Information Manufacturer: Quanta Product Name: 30D0 Version: 85.26 Serial Number: None2 Handle 0x0003, DMI type 3, 17 bytes Chassis Information Manufacturer: Quanta Type: Notebook Lock: Not Present Version: N/A Serial Number: None Asset Tag: Boot-up State: Safe Power Supply State: Safe Thermal State: Safe Security Status: None OEM Information: 0x00000104 Handle 0x0004, DMI type 4, 35 bytes Processor Information Socket Designation: Socket S1 Type: Central Processor Family: Opteron Manufacturer: AMD ID: 82 0F 06 00 FF FB 8B 17 Signature: Family 15, Model 104, Stepping 2 Flags: FPU (Floating-point unit on-chip) VME (Virtual mode extension) DE (Debugging extension) PSE (Page size extension) TSC (Time stamp counter) MSR (Model specific registers) PAE (Physical address extension) MCE (Machine check exception) CX8 (CMPXCHG8 instruction supported) APIC (On-chip APIC hardware supported) SEP (Fast system call) MTRR (Memory type range registers) PGE (Page global enable) MCA (Machine check architecture) CMOV (Conditional move instruction supported) PAT (Page attribute table) PSE-36 (36-bit page size extension) CLFSH (CLFLUSH instruction supported) MMX (MMX technology supported) FXSR (Fast floating-point save and restore) SSE (Streaming SIMD extensions) SSE2 (Streaming SIMD extensions 2) HTT (Hyper-threading technology) Version: AMD Turion(tm) 64 X2 Mobile TL60 Voltage: 1.6 V External Clock: 200 MHz Max Speed: 2000 MHz Current Speed: 2000 MHz Status: Populated, Enabled Upgrade: None L1 Cache Handle: 0x0005 L2 Cache Handle: 0x0006 L3 Cache Handle: Not Provided Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Handle 0x0005, DMI type 7, 19 bytes Cache Information Socket Designation: L1 Cache Configuration: Enabled, Not 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: Asynchronous Speed: Unknown Error Correction Type: Unknown System Type: Unknown Associativity: Unknown Handle 0x0006, DMI type 7, 19 bytes Cache Information Socket Designation: L2 Cache Configuration: Enabled, Not Socketed, Level 2 Operational Mode: Write Through Location: Internal Installed Size: 1024 KB Maximum Size: 1024 KB Supported SRAM Types: Burst Pipeline Burst Synchronous Installed SRAM Type: Synchronous Speed: Unknown Error Correction Type: Unknown System Type: Unified Associativity: Unknown Handle 0x0007, DMI type 9, 13 bytes System Slot Information Designation: PCI Express Slot 1 Type: 64-bit PCI Express Current Usage: Available Length: Short ID: 0 Characteristics: 5.0 V is provided 3.3 V is provided Handle 0x0008, DMI type 9, 13 bytes System Slot Information Designation: PCI Express Slot 2 Type: 64-bit PCI Express Current Usage: Available Length: Short ID: 0 Characteristics: 5.0 V is provided 3.3 V is provided PME signal is supported Hot-plug devices are supported Handle 0x0009, DMI type 10, 6 bytes On Board Device Information Type: Video Status: Enabled Description: Handle 0x000A, DMI type 11, 5 bytes OEM Strings String 1: $HP$ String 2: LOC#ABD String 3: ABS 70/71 6A 6B 6C 6D Handle 0x000B, DMI type 16, 15 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 2 GB Error Information Handle: Not Provided Number Of Devices: 2 Handle 0x000C, DMI type 17, 27 bytes Memory Device Array Handle: 0x000B Error Information Handle: No Error Total Width: 64 bits Data Width: 64 bits Size: 2048 MB Form Factor: DIMM Set: 1 Locator: DIMM 1 Bank Locator: Bank 0,1 Type: DDR2 Type Detail: Synchronous Speed: 667 MHz (1.5 ns) Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Handle 0x000D, DMI type 17, 27 bytes Memory Device Array Handle: 0x000B Error Information Handle: No Error Total Width: 64 bits Data Width: 64 bits Size: 1024 MB Form Factor: DIMM Set: 1 Locator: DIMM 2 Bank Locator: Bank 2,3 Type: DDR2 Type Detail: Unknown Speed: 667 MHz (1.5 ns) Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Handle 0x000E, DMI type 19, 15 bytes Memory Array Mapped Address Starting Address: 0x00000000000 Ending Address: 0x000BFFFFFFF Range Size: 3 GB Physical Array Handle: 0x000B Partition Width: 0 Handle 0x000F, DMI type 20, 19 bytes Memory Device Mapped Address Starting Address: 0x00000000000 Ending Address: 0x0007FFFFFFF Range Size: 2 GB Physical Device Handle: 0x000C Memory Array Mapped Address Handle: 0x000E Partition Row Position: 2 Interleave Position: 2 Interleaved Data Depth: 2 Handle 0x0010, DMI type 20, 19 bytes Memory Device Mapped Address Starting Address: 0x00080000000 Ending Address: 0x000BFFFFFFF Range Size: 1 GB Physical Device Handle: 0x000D Memory Array Mapped Address Handle: 0x000E Partition Row Position: 2 Interleave Position: 2 Interleaved Data Depth: 2 Handle 0x0011, DMI type 32, 20 bytes System Boot Information Status: <OUT OF SPEC> Handle 0x0012, DMI type 127, 4 bytes End Of Table Please let me know in case additional information helps. Best regards, - Dieter Probst -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html