SMP kernel only brings up one CPU/core
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
This has worked with this particular kernel, and previous kernels, but lately my quad-core system has only been bringing up one CPU/core. I've attached debugging.txt, which contains the output of uname -a, cat /proc/cpuinfo, and dmesg. I figure there's about a 15% chance that all four cores will be brought up when I reboot, but I haven't been able to figure out how to force it to bring up all cores. Downgrading to previous kernels doesn't work. And booting into WinXP definitely shows all four cores, so I doubt it's a problem with the hardware (but I may be wrong about this).
ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 8.10
NonfreeKernelMo
Package: linux-image-
ProcCmdLine: root=UUID=
ProcEnviron:
PATH=/
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSign
SourcePackage: linux
I rebooted, and all four cores were brought up. I'm attaching the output of uname, cpuinfo, and dmesg again (not sure what ubuntu-bug is going to post here, so it may be superfluous).