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Description of problem: Fresh install of F16 on Macbook Pro (dual boot) only uses on CPU core in a dual core system. Version-Release number of selected component (if applicable): 32 bit Fedora 16 kernel version 3.1.7-1.fc16.i686.PAE Intel(R) Core(TM)2 Duo CPU P8700 @ 2.53GHz How reproducible: Every time. Steps to Reproduce: 1. add unpartitioned space at end of OS X disk 2. install rEFIt in OS X to manage dual-boot 3. install F16 to unpartitioned space 4. allow rEFIt to fix partition tables after install 5. boot system into Fedora Actual results: /proc/cpuinfo only shows a single core available During boot and in dmesg, I can see: [ 0.019998] CPU 1 irqstacks, hard=f1cde000 soft=f1ce8000 [ 0.019998] Booting Node 0, Processors #1 Ok. [ 0.019998] smpboot cpu 1: start_ip = 9b000 [ 5.094766] CPU1: Not responding. [ 5.094877] Brought up 1 CPUs [ 5.094879] Total of 1 processors activated (5041.85 BogoMIPS). which seems to indicate there is a problem with CPU 1. Expected results: Both cores to be functional. Additional info: This worked just fine in F15, and both cores were fully operational.
[mass update] kernel-3.3.0-4.fc16 has been pushed to the Fedora 16 stable repository. Please retest with this update.
Circling back around to this...sorry for the delay. Newer kernels appear to be working better, and I can see both cores again.
Thanks for letting us know.