Public bug reported:
Just installed hardy on a new machine (which has a recent cpu: Intel
Core 2 Q9550... required a BIOS upgrade for a motherboard which was a
year old). When I look at the /proc/cpuinfo for that machine, it reports
1 core with 4 siblings when the CPU is a quad-core with no
hyperthreading (so should be 4 cores). An identical machine even with an
older CPU (Intel Q6600) returns the correct number of cores in
/proc/cpuinfo.
As said, I just updated the BIOS for the Q9550 machine to the latest
version, so that shouldn't be the problem (but any hints on how to dump
the ACPI data and confirm it is correct would be appreciated).
We're running 8.04.3 LTS, with kernel 2.6.24-24-server
** Affects: ubuntu
Importance: Undecided
Status: New
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Wrong /proc/cpuinfo information with Q9550 Intel Core 2 CPU
https://bugs.launchpad.net/bugs/410043
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