There is strange message in dmesg log [ 0.063379] CPU0: Intel(R) Core(TM)2 Duo CPU P8700 @ 2.53GHz stepping 0a [ 0.064000] Booting Node 0, Processors #1 Ok. [ 5.074831] CPU1: Not responding. [ 5.074946] Brought up 1 CPUs [ 5.075027] Total of 1 processors activated (5040.94 BogoMIPS).
See CPU1: Not responding On Sat, Apr 30, 2011 at 5:08 PM, Ynk <774...@bugs.launchpad.net> wrote: > -- > You received this bug notification because you are subscribed to linux > in Ubuntu. > https://bugs.launchpad.net/bugs/774037 > > Title: > All CPU cores are not always detected > > Status in “linux” package in Ubuntu: > New > > Bug description: > This bug exists on a 20090 Mac Mini with a Intel Core 2 Duo. This is > CPU with two cores. > > Steps to reproduce: > 1) Reboot. > 2) cat /proc/cpuinfo > 3) If two cores show up, repeat the test. > > When linux only finds one CPU, the problem can be fixed by rebooting > until both cores are found. On average, is seems that both cores are > detected 50% of the time, so usually one reboot will have one core, > then the next will have two, and then repeat. > > This bug did not exist in the kernel found in Ubuntu 9.10. > > ProblemType: Bug > DistroRelease: Ubuntu 10.10 > Package: linux-image-2.6.35-28-generic-pae 2.6.35-28.50 > Regression: Yes > Reproducible: Yes > ProcVersionSignature: Ubuntu 2.6.35-28.50-generic-pae 2.6.35.11 > Uname: Linux 2.6.35-28-generic-pae i686 > NonfreeKernelModules: nvidia wl > AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23. > Architecture: i386 > AudioDevicesInUse: > USER PID ACCESS COMMAND > /dev/snd/controlC0: eae 1962 F.... pulseaudio > eae 2079 F.... foobar2000.exe > /dev/snd/pcmC0D0p: eae 1962 F...m pulseaudio > CRDA: Error: [Errno 2] No such file or directory > Card0.Amixer.info: > Card hw:0 'NVidia'/'HDA NVidia at 0xd3480000 irq 21' > Mixer name : 'Realtek ALC889A' > Components : 'HDA:10ec0885,106b4100,00100103' > Controls : 34 > Simple ctrls : 19 > Date: Sat Apr 30 07:27:03 2011 > InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 > (20101007) > MachineType: Apple Inc. Macmini3,1 > ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-28-generic-pae > root=UUID=345cc220-2160-4611-8c3a-6bd3c000a2e1 ro > ProcEnviron: > LANGUAGE=en_US > LANG=en_US.utf8 > SHELL=/bin/bash > RelatedPackageVersions: linux-firmware 1.38.6 > RfKill: > 0: hci0: Bluetooth > Soft blocked: no > Hard blocked: no > SourcePackage: linux > dmi.bios.date: 07/17/09 > dmi.bios.vendor: Apple Inc. > dmi.bios.version: MM31.88Z.00AD.B00.0907171535 > dmi.board.asset.tag: Base Board Asset Tag# > dmi.board.name: Mac-F22C86C8 > dmi.board.vendor: Apple Inc. > dmi.chassis.asset.tag: Asset Tag# > dmi.chassis.type: 16 > dmi.chassis.vendor: Apple Inc. > dmi.chassis.version: Mac-F22C86C8 > dmi.modalias: > dmi:bvnAppleInc.:bvrMM31.88Z.00AD.B00.0907171535:bd07/17/09:svnAppleInc.:pnMacmini3,1:pvr1.0:rvnAppleInc.:rnMac-F22C86C8:rvr:cvnAppleInc.:ct16:cvrMac-F22C86C8: > dmi.product.name: Macmini3,1 > dmi.product.version: 1.0 > dmi.sys.vendor: Apple Inc. > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774037 Title: All CPU cores are not always detected -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
