On Tue, May 17, 2016 at 8:14 PM, Augusto Mecking Caringi <augustocaringi@xxxxxxxxx> wrote: > Hi, > > After I've upgraded to the latest kernel (4.6), I'm getting some > ACPI related warnings during startup like that: > > [ 5897.966583] WARNING: CPU: 0 PID: 8240 at > drivers/cpufreq/cpufreq.c:2173 cpufreq_update_policy+0xcf/0xf0 > [ 5897.966586] Modules linked in: iptable_nat nf_nat_ipv4 nf_nat > x86_pkg_temp_thermal apple_gmux > [ 5897.966589] CPU: 0 PID: 8240 Comm: kworker/0:1 Not tainted > 4.6.0-00442-gcf6ed9a #13 > [ 5897.966589] Hardware name: Apple Inc. > MacBookPro8,1/Mac-94245B3640C91C81, BIOS > MBP81.88Z.0047.B27.1201241646 01/24 > /12 > [ 5897.966593] Workqueue: kacpi_notify acpi_os_execute_deferred > [ 5897.966595] 0000000000000000 ffff8800347b3ba8 ffffffff8153d118 > 0000000000000000 > [ 5897.966596] 0000000000000000 ffff8800347b3be8 ffffffff810a9b06 > 0000087d810e4eb2 > [ 5897.966598] ffff880169384a00 00000000fffffffb ffff880169384b10 > 0000000000000000 > [ 5897.966598] Call Trace: > [ 5897.966602] [<ffffffff8153d118>] dump_stack+0x4d/0x65 > [ 5897.966604] [<ffffffff810a9b06>] __warn+0xc6/0xe0 > [ 5897.966606] [<ffffffff810a9bd8>] warn_slowpath_null+0x18/0x20 > [ 5897.966607] [<ffffffff8189ba3f>] cpufreq_update_policy+0xcf/0xf0 > [ 5897.966608] [<ffffffff8189ba60>] ? cpufreq_update_policy+0xf0/0xf0 > [ 5897.966611] [<ffffffff815d28a6>] acpi_processor_ppc_has_changed+0x6f/0x77 > [ 5897.966614] [<ffffffff815cf96f>] acpi_processor_notify+0x51/0xdc > [ 5897.966616] [<ffffffff815b5468>] acpi_ev_notify_dispatch+0x3f/0x57 > [ 5897.966617] [<ffffffff815a0b32>] acpi_os_execute_deferred+0xf/0x1b > [ 5897.966620] [<ffffffff810c0d98>] process_one_work+0x158/0x470 > [ 5897.966621] [<ffffffff810c10f3>] worker_thread+0x43/0x4d0 > [ 5897.966623] [<ffffffff810c10b0>] ? process_one_work+0x470/0x470 > [ 5897.966625] [<ffffffff810c6404>] kthread+0xc4/0xe0 > [ 5897.966628] [<ffffffff81b47412>] ret_from_fork+0x22/0x40 > [ 5897.966630] [<ffffffff810c6340>] ? kthread_worker_fn+0x160/0x160 > [ 5897.966631] ---[ end trace f45cd8737fc1698b ]--- > > This message appears 6 times at each boot. > > Are they normal? Maybe wrong ACPI kernel options configured? They should not appear, but the problem may not be too serious. It looks like the cpufreq driver's ->get() callback returns 0 when asked for the current frequency. Please check what's in the /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver file. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
