在没有任何事先警告的情况下,我的笔记本电脑的 CPU(宏碁 V15 Nitro) 现在总是被限制在 400MHZ,这当然非常烦人。
我尝试过一段时间卸下电池,在连接或未连接 HDMI 电缆的情况下启动和重新启动,我启动到 18.04(我运行 19.10),还是同样的事情。
唯一有影响的是进入睡眠模式,然后再次唤醒机器。短暂的片刻,节流消失,CPU 正常工作。然而,当我启动程序时,频率再次降至 400 并保持在那里。
我注意到的唯一区别是 CPU 风扇似乎发出咔嗒声。每隔 8-10 秒它就会咔嗒几声。我不确定这是否有关联。
我尝试运行 pwmconfig,希望找出风扇是否有问题,但它只是返回没有安装支持 pwm 的传感器模块。(传感器检测也没有帮助)
以下是 lscpu 输出的内容:
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
如果您能提供任何解决此问题的想法或建议,我将不胜感激。
编辑:传感器信息。在这些温度下,CPU 已经受到限制。
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)
答案1
所以问题确实出在 CPU 风扇上。我买了一个替换风扇,安装好后,现在即使在高负载下 CPU 也不会节流。