Hi! > >The kernel is 4.8.17 EOL, installed almost a month ago. > >Platform ThinkPad x60, Intel(R) Core(TM) Duo CPU T2400 @ 1.83GHz > > > >In dmesg I see that it used to be when 2 CPUs were OK: > >[690409.476107] PM: noirq suspend of devices complete after 79.914 msecs > >[690409.476547] ACPI: Preparing to enter system sleep state S3 > >[690409.780081] ACPI : EC: EC stopped > >[690409.780083] PM: Saving platform NVS memory > >[690409.780284] Disabling non-boot CPUs ... > >[690409.805284] smpboot: CPU 1 is now offline > >[690409.816464] ACPI: Low-level resume complete > >[690409.816464] ACPI : EC: EC started > >[690409.816464] PM: Restoring platform NVS memory > >[690409.816464] Enabling non-boot CPUs ... > >[690409.840574] x86: Booting SMP configuration: > >[690409.840576] smpboot: Booting Node 0 Processor 1 APIC 0x1 > >[690409.805271] Initializing CPU#1 > >[690409.805271] Disabled fast string operations > >[690409.888252] cache: parent cpu1 should not be sleeping > >[690409.920185] CPU1 is up > >[690409.922288] ACPI: Waking up from system sleep state S3 > > > >Then the CPU1 failed to start: > > > >[691329.776108] PM: noirq suspend of devices complete after 79.941 msecs > >[691329.776550] ACPI: Preparing to enter system sleep state S3 > >[691330.080081] ACPI : EC: EC stopped > >[691330.080083] PM: Saving platform NVS memory > >[691330.080284] Disabling non-boot CPUs ... > >[691330.105303] smpboot: CPU 1 is now offline > >[691330.116477] ACPI: Low-level resume complete > >[691330.116477] ACPI : EC: EC started > >[691330.116477] PM: Restoring platform NVS memory > >[691330.116477] Enabling non-boot CPUs ... > >[691330.140570] x86: Booting SMP configuration: > >[691330.140572] smpboot: Booting Node 0 Processor 1 APIC 0x1 > >[691340.140015] smpboot: do_boot_cpu failed(-1) to wakeup CPU#1 > >[691340.164445] Error taking CPU1 up: -5 > >[691340.166309] ACPI: Waking up from system sleep state S3 > > > >And now it is: > >[692517.868523] ACPI: Preparing to enter system sleep state S3 > >[692518.172074] ACPI : EC: EC stopped > >[692518.172076] PM: Saving platform NVS memory > >[692518.172269] Disabling non-boot CPUs ... > >[692518.172269] ACPI: Low-level resume complete > >[692518.172269] ACPI : EC: EC started > >[692518.172269] PM: Restoring platform NVS memory > >[692518.172269] ACPI: Waking up from system sleep state S3 > > > >Is there any test I could do on the CPU wakeup while in that state? > > > Is there a way to kick the offline-CPU into operation from /sys level?
echo 0 > /sys/devices/system/cpu/cpu1/online should work. And... good thinking :-). Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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