On Friday 13 November 2009 06:38:38 am Fred Labrosse wrote: > At some point, I discovered that I only had one processor active on my > laptop (A VAIO VGN-SZ2M) wich has a centrino duo in (2 cores). I then > discovered in dmesg the lines that say: > > ACPI: BIOS bug: multiple APIC/MADT found, using 0 > ACPI: If "acpi_apic_instance=2" works better, notify linux- > acpi@xxxxxxxxxxxxxxx > > So I did that (acpi_apic_instance=2) and that did give me 2 processors. > Which is definitely better, hence my email to the suggested address. I think we need a DMI or similar mechanism to do this automatically, so you don't need to use "acpi_apic_instance=2" every time you boot. Can you open a bug report at http://bugzilla.kernel.org, attach the output of dmidecode, and post the bug URL here? > There is one thing that does not quite work however and I don't know if this > is related: ACPI only sees one processor and therefore cpufreq only controls > the frequency of one processor. I think this used to work but I don't know > when that stopped. I assume you mean that with "acpi_apic_instance=2", Linux starts both CPUs, but cpufreq only works with one. If so, can you open another bug report, attach the dmesg log, and post the URL here? Thanks, Bjorn -- 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
