Messages in this thread |  | | | Date | Thu, 05 Feb 2009 18:33:11 -0600 | | From | Robert Hancock <> | | Subject | Re: Regression on VIA C3 motherboard, commit: 66f2173e2 |
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Ben Greear wrote: > I have a via motherboard with C3 processor and some real-tek NICs. I > noticed > when using the top-of-tree that performance on it sucked (30Mbps v/s 54Mbps > network throughput in one pertinent test). > > After several hours of bisecting, I see this as the culprit: > > 7b37b5fd9ba32c0c5afc3537eed7e7466f2173e2 is first bad commit > commit 7b37b5fd9ba32c0c5afc3537eed7e7466f2173e2 > Author: Len Brown <len.brown@intel.com> > Date: Tue Dec 23 01:47:42 2008 -0500 > > ACPI: disable MPS when NO APIC-table found > When ACPI is asked to find an MADT (APIC table) > and fails, then ACPI expects to run in PIC mode. > However, if an MP Table is was found, IRQs will be > registered as if an IOAPIC is being used, even > though ACPI is configuring interrupt links links for PIC mode. > In this scenario, disable MPS so that IRQs > are registered in PIC mode, consistent with ACPI. > http://bugzilla.kernel.org/show_bug.cgi?id=12257 > Signed-off-by: Len Brown <len.brown@intel.com> > > :040000 040000 86ce74daee3a9fe6ff21ef7f8fb364af23ec0c1e > 364933dfec0df34e63b1aeff6aff4092d421886b M arch > > > In addition, I see this warning in my logs, which is likely the symptom: > > ACPI Exception (tbxface-0627): AE_NO_ACPI_TABLES, While loading > namespace from ACPI tables ] > ACPI: Unable to load the System Description Tables
You're getting this on boot:
ACPI Error (tbxfroot-0218): A valid RSDP was not found [20080926]
That essentially means ACPI isn't working at all, I think. Did previous kernels produce this error? Do you have ACPI disabled in the BIOS or something?
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