As per the kernel message, attached is the output of dmidecode for this machine. Adding acpi_osi=!Linux causes this to be logged: ACPI: Disabled _OSI(Linux) (at least I think it does; I don't remember seeing it before) I'm not sure what other effects, if any, this is supposed to have? The ACPI driver also complains on boot: ACPI: BIOS bug: multiple APIC/MADT found, using 0 ACPI: If "acpi_apic_instance=2" works better, notify linux-acpi@xxxxxxxxxxxxxxx This kernel option doesn't have any perceptible effect on anything other than to say the same thing but to try to use acpi_apic_instance=0 :) (IMO this laptop has more than its fair share of problems in Linux, or Ubuntu at least; no particularly exotic hardware or anything. I don't know how much ACPI-related stuff could be affecting this?) Please don't hesitate to ask for any more information about this laptop! Cheers, and happy holidays! Jesse Burt
# dmidecode 2.9 SMBIOS 2.4 present. 17 structures occupying 644 bytes. Table at 0x000E3810. Handle 0x0000, DMI type 0, 24 bytes BIOS Information Vendor: Hewlett-Packard Version: F.13 Release Date: 01/16/2007 Address: 0xE71D0 Runtime Size: 101936 bytes ROM Size: 1024 kB Characteristics: PCI is supported PC Card (PCMCIA) 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) Printer services are supported (int 17h) 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 Targeted content distribution is supported BIOS Revision: 1.6 Firmware Revision: 1.1 Handle 0x0001, DMI type 1, 27 bytes System Information Manufacturer: Hewlett-Packard Product Name: Presario C500 (RZ342UA#ABA) Version: F.13 Serial Number: CND709290W UUID: 07285F90-C697-11DB-B067-0016D4C0FDDB Wake-up Type: Power Switch SKU Number: RZ342UA#ABA Family: 103C_5335KV Handle 0x0002, DMI type 2, 8 bytes Base Board Information Manufacturer: Hewlett-Packard Product Name: 30C6 Version: 78.10 Serial Number: CND709290W Handle 0x0003, DMI type 3, 17 bytes Chassis Information Manufacturer: Hewlett-Packard 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: 0x00001234 Handle 0x0004, DMI type 4, 35 bytes Processor Information Socket Designation: U1 Type: Central Processor Family: Other Manufacturer: Intel ID: F6 06 00 00 FF FB EB AF Version: Intel(R) Celeron(R) M CPU 520 Voltage: 3.3 V External Clock: Unknown Max Speed: 1600 MHz Current Speed: 1600 MHz Status: Populated, Enabled Upgrade: ZIF Socket L1 Cache Handle: Not Provided L2 Cache Handle: 0x0005 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: L2 Cache Configuration: Enabled, Socketed, Level 2 Operational Mode: Write Back Location: Internal Installed Size: 1024 KB Maximum Size: 2048 KB Supported SRAM Types: Burst Pipeline Burst Installed SRAM Type: Burst Speed: Unknown Error Correction Type: Unknown System Type: Unknown Associativity: Unknown Handle 0x0006, DMI type 9, 13 bytes System Slot Information Designation: PCI Slot J1100 Type: 32-bit PCI Current Usage: In Use Length: Long ID: 0 Characteristics: 5.0 V is provided 3.3 V is provided PME signal is supported Handle 0x0007, DMI type 9, 13 bytes System Slot Information Designation: PCI Slot J1101 Type: 32-bit PCI Current Usage: In Use Length: Long ID: 0 Characteristics: 5.0 V is provided 3.3 V is provided PME signal is supported Handle 0x0008, DMI type 10, 6 bytes On Board Device Information Type: Video Status: Enabled Description: 8 Handle 0x0009, DMI type 11, 5 bytes OEM Strings String 1: $HP$ Handle 0x000A, 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 0x000B, DMI type 17, 27 bytes Memory Device Array Handle: 0x000A Error Information Handle: No Error Total Width: 32 bits Data Width: 32 bits Size: 512 MB Form Factor: SODIMM Set: 1 Locator: M1 Bank Locator: Bank 0 Type: DDR2 Type Detail: Synchronous Speed: Unknown Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Handle 0x000C, DMI type 17, 27 bytes Memory Device Array Handle: 0x000A Error Information Handle: No Error Total Width: Unknown Data Width: Unknown Size: No Module Installed Form Factor: SODIMM Set: 2 Locator: M2 Bank Locator: Bank 1 Type: DDR2 Type Detail: Synchronous Speed: Unknown Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Handle 0x000D, DMI type 19, 15 bytes Memory Array Mapped Address Starting Address: 0x00000000000 Ending Address: 0x0001FFFFFFF Range Size: 512 MB Physical Array Handle: 0x000A Partition Width: 0 Handle 0x000E, DMI type 20, 19 bytes Memory Device Mapped Address Starting Address: 0x00000000000 Ending Address: 0x0001FFFFFFF Range Size: 512 MB Physical Device Handle: 0x000B Memory Array Mapped Address Handle: 0x000D Partition Row Position: 2 Interleave Position: 1 Interleaved Data Depth: 6 Handle 0x000F, DMI type 32, 20 bytes System Boot Information Status: <OUT OF SPEC> Handle 0x0010, DMI type 127, 4 bytes End Of Table
