I found a solution to this problem. Before, I needed to boot with options noapic nolapic which caused the machine to bring up one core only. Replacing the boot options as follows noapic nolapic --> pci=assign-busses apicmaintimer idle=poll reboot=cold,hard fixed the problem on my machine. Since I got both cores running quite recently only, I think I will stay with the working configuration for a while before upgrading to the Ubuntu version 9.10
On Fri, Dec 18, 2009 at 1:48 AM, malev <marcosvane...@gmail.com> wrote: > Thank you for taking the time to report this bug and helping to make > Ubuntu better. You reported this bug a while ago and there hasn't been > any activity in it recently. We were wondering if this is still an issue > for you. Can you try with the latest Ubuntu release? Thanks in advance. > > ** Changed in: ubuntu > Status: Confirmed => Incomplete > > -- > After upgrade to version 9.04, Ubuntu uses only one processor. > https://bugs.launchpad.net/bugs/371210 > You received this bug notification because you are a direct subscriber > of the bug. > > Status in Ubuntu: Incomplete > > Bug description: > I have run Ubuntu 8.10 on my Packard Bell EasyNote MH-35 laptop without > problems. After upgrading to Ubuntu version 9.04, lap-top is slow and uses > only one core. The processor is Intel Core Duo T8100. I have to use noapic > nolapic boot options to get Ubuntu booting (also in the 8.10 version). I > have tried to disable the USB mouse and keyboard support in BIOS (this was > suggested as a solution on another lap-top) but in this case the system > refuses to boot. > Below some more info. > > # cat /proc/cpuinfo > processor : 0 > vendor_id : GenuineIntel > cpu family : 6 > model : 23 > model name : Intel(R) Core(TM)2 Duo CPU T8100 @ 2.10GHz > stepping : 6 > cpu MHz : 1200.000 > cache size : 3072 KB > physical id : 0 > siblings : 1 > core id : 0 > cpu cores : 1 > apicid : 0 > initial apicid : 0 > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 10 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov > pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc > arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr > pdcm sse4_1 lahf_lm ida tpr_shadow vnmi flexpriority > bogomips : 4200.11 > clflush size : 64 > power management: > > # dmesg | grep -i cpu > [ 0.000000] Initializing cgroup subsys cpuset > [ 0.000000] Initializing cgroup subsys cpu > [ 0.000000] KERNEL supported cpus: > [ 0.000000] Transmeta TransmetaCPU > [ 0.000000] ACPI: SSDT B7D9924D, 025F (r1 PmRef Cpu0Tst 3000 INTL > 20050228) > [ 0.000000] ACPI: SSDT B7D991A7, 00A6 (r1 PmRef Cpu7Tst 3000 INTL > 20050228) > [ 0.000000] ACPI: SSDT B7D99101, 00A6 (r1 PmRef Cpu6Tst 3000 INTL > 20050228) > [ 0.000000] ACPI: SSDT B7D9905B, 00A6 (r1 PmRef Cpu5Tst 3000 INTL > 20050228) > [ 0.000000] ACPI: SSDT B7D98FB5, 00A6 (r1 PmRef Cpu4Tst 3000 INTL > 20050228) > [ 0.000000] ACPI: SSDT B7D98F0F, 00A6 (r1 PmRef Cpu3Tst 3000 INTL > 20050228) > [ 0.000000] ACPI: SSDT B7D98E69, 00A6 (r1 PmRef Cpu2Tst 3000 INTL > 20050228) > [ 0.000000] ACPI: SSDT B7D98DC3, 00A6 (r1 PmRef Cpu1Tst 3000 INTL > 20050228) > [ 0.000000] ACPI: SSDT B7D979A9, 141A (r1 PmRef CpuPm 3000 INTL > 20050228) > [ 0.000000] Processor #0 (Bootup-CPU) > [ 0.000000] SMP: Allowing 2 CPUs, 0 hotplug CPUs > [ 0.000000] PERCPU: Allocating 45056 bytes of per cpu data > [ 0.000000] NR_CPUS: 64, nr_cpu_ids: 2, nr_node_ids 1 > [ 0.000000] Initializing CPU#0 > [ 0.004000] SLUB: Genslabs=12, HWalign=64, Order=0-3, MinObjects=0, > CPUs=2, Nodes=1 > [ 0.004000] HPET: 3 timers in total, 0 timers will be used for per-cpu > timer > [ 0.004000] Initializing cgroup subsys cpuacct > [ 0.004000] CPU: L1 I cache: 32K, L1 D cache: 32K > [ 0.004000] CPU: L2 cache: 3072K > [ 0.004000] CPU: Physical Processor ID: 0 > [ 0.004000] CPU: Processor Core ID: 0 > [ 0.532470] Brought up 1 CPUs > [ 0.532488] CPU0 attaching NULL sched-domain. > [ 0.568016] Switched to high resolution mode on CPU 0 > [ 1.643118] cpufreq: No nForce2 chipset. > [ 1.664851] ACPI: SSDT B7D99D67, 0261 (r1 PmRef Cpu0Ist 3000 INTL > 20050228) > [ 1.668409] ACPI: SSDT B7D994AC, 0518 (r1 PmRef Cpu0Cst 3001 INTL > 20050228) > [ 1.671438] ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3]) > [ 1.671480] processor ACPI_CPU:00: registered as cooling_device1 > [ 1.671488] ACPI: Processor [CPU0] (supports 8 throttling states) > [ 2.796475] cpuidle: using governor ladder > [ 2.796566] cpuidle: using governor menu > [ 43.694069] CPU0 attaching NULL sched-domain. > [ 43.694140] CPU0 attaching NULL sched-domain. > > To unsubscribe from this bug, go to: > https://bugs.launchpad.net/ubuntu/+bug/371210/+subscribe > -- After upgrade to version 9.04, Ubuntu uses only one processor. https://bugs.launchpad.net/bugs/371210 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
