On Wednesday 19 December 2007 12:11, Jesse Burt wrote: > 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? it may be a NOP -- I'll be able to confirm w/ your acpidump output. > 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 i can double check this in your acpidump output too. The duplicate may be identical, or Linux may be immune to the differences (depends what they are) not sign of high quality BIOS, this... > 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! 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 Please send me the output from acpidump. If you don't have acpidump, you can get it from pmtools here: http://www.lesswatts.org/projects/acpi/utilities.php thanks, -Len - 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