ça ne change rien avec le LiveCD F10 x86_64... Je ne sais pas si le problème vient du noyau 64 bits. Je ne trouve rien de particulier sur internet pour l'instant. J'ai essayé cette commande et effectivement le noyau ne voit qu'un coeur au lieu de 2
# dmesg | grep cpu -i
Initializing cgroup subsys cpuset
Initializing cgroup subsys cpu
KERNEL supported cpus:
x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
SMP: Allowing 1 CPUs, 0 hotplug CPUs
NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:1 nr_node_ids:1
PERCPU: Embedded 27 pages at ffff880001010000, static data 79584 bytes
Initializing CPU#0
SLUB: Genslabs=14, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
Initializing cgroup subsys cpuacct
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 512K (64 bytes/line)
CPU 0/0x0 -> Node 0
CPU0: AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ stepping 02
Brought up 1 CPUs
CPU0 attaching NULL sched-domain.
alloc irq_desc for 27 on cpu 0 node 0
alloc kstat_irqs on cpu 0 node 0
...
processor ACPI_CPU:00: registered as cooling_device1
alloc irq_desc for 21 on cpu 0 node 0
alloc kstat_irqs on cpu 0 node 0
cpuidle: using governor ladder
cpuidle: using governor menu
Switched to high resolution mode on CPU 0
alloc irq_desc for 24 on cpu 0 node 0
alloc kstat_irqs on cpu 0 node 0
...
powernow-k8: Found 1 AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ processors (1 cpu cores) (version 2.20.00)
Marking TSC unstable due to cpufreq changes
Au lieu d'un truc du genre (pris sur internet, pour l'exemple)
...
Brought up 2 CPUs
CPU0 attaching sched-domain:
CPU1 attaching sched-domain:
Switched to high resolution mode on CPU 0
Switched to high resolution mode on CPU 1
cpuidle: using governor ladder
cpuidle: using governor menu
processor ACPI_CPU:00: registered as cooling_device0
processor ACPI_CPU:01: registered as cooling_device1
powernow-k8: Found 1 AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ processors (2 cpu cores) (version 2.20.00)
Je vais encore essayé avec une Fedora 32 bits pour voir.