19:10: CPU总是节流

Question

在没有任何事先警告的情况下，我的笔记本电脑(一台宏碁V15硝基)中的CPU现在总是节流到400 the，这当然很烦人。

我玩了一段时间分离电池，启动和重新启动与HDMI电缆连接或未连接，我启动到18.04 (我运行19.10)，同样的事情。

唯一起作用的是进入睡眠模式，然后再唤醒机器。在短时间内，节流消失了，cpu做了它应该做的事情。然而，当我开始一个程序的时候，freq再次下降到400并停留在那里。

我注意到的唯一不同之处是cpu风扇似乎正在发出点击声音。每8-10秒它点击几次。我不知道这是否有关联。

我试着运行pwmconfig，希望找出风扇是否出了问题，但它刚刚返回，没有安装具有pwm功能的传感器模块。(传感器检测也无济于事)

这里是lscpu吐露的内容：

Architecture:                    x86_64
CPU op-mode(s):                  32-bit, 64-bit
Byte Order:                      Little Endian
Address sizes:                   39 bits physical, 48 bits virtual
CPU(s):                          4
On-line CPU(s) list:             0-3
Thread(s) per core:              2
Core(s) per socket:              2
Socket(s):                       1
NUMA node(s):                    1
Vendor ID:                       GenuineIntel
CPU family:                      6
Model:                           78
Model name:                      Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz
Stepping:                        3
CPU MHz:                         400.001
CPU max MHz:                     3100,0000
CPU min MHz:                     400,0000
BogoMIPS:                        5199.98
Virtualization:                  VT-x
L1d cache:                       64 KiB
L1i cache:                       64 KiB
L2 cache:                        512 KiB
L3 cache:                        4 MiB
NUMA node0 CPU(s):               0-3
Vulnerability Itlb multihit:     KVM: Mitigation: Split huge pages
Vulnerability L1tf:              Mitigation; PTE Inversion; VMX conditional cache flushes, SMT vulnerable
Vulnerability Mds:               Mitigation; Clear CPU buffers; SMT vulnerable
Vulnerability Meltdown:          Mitigation; PTI
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl and seccomp
Vulnerability Spectre v1:        Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2:        Mitigation; Full generic retpoline, IBPB conditional, IBRS_FW, STIBP conditional, RSB filling
Vulnerability Tsx async abort:   Not affected
Flags:                           fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe
                                  syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmpe
                                 rf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt
                                  tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ib
                                 pb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rdseed a
                                 dx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_ep
                                 p md_clear flush_l1d

我将非常感谢任何解决这个问题的想法或建议。

编辑:传感器信息。在这些温度下，CPU已经节流了。

pch_skylake-virtual-0
Adapter: Virtual device
temp1:        +47.5°C  

BAT0-acpi-0
Adapter: ACPI interface
in0:         +12.60 V  
curr1:        +1.15 A  

ath10k_hwmon-pci-0300
Adapter: PCI adapter
temp1:        +39.0°C  

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +47.0°C  (high = +100.0°C, crit = +100.0°C)
Core 0:        +47.0°C  (high = +100.0°C, crit = +100.0°C)
Core 1:        +44.0°C  (high = +100.0°C, crit = +100.0°C)

acpitz-acpi-0
Adapter: ACPI interface
temp1:        +47.0°C  (crit = +99.0°C)
temp2:        +41.0°C  (crit = +92.0°C)

Answer 1

结果发现问题确实是CPU风扇的问题。我得到了替换，安装了它，现在即使在沉重的负载下，CPU也没有节流。