baseline power consumtion kernel > 5.3.10

[Guido Riedel <guido.riedel@web.de>]

Hi,

Since Kernel 5.3.11 I got a significant increased baseline Power 
consumption. I tried up to 5.4.1 on arch linux. Powertop shows an 
increase from 3.6W on 5.3.10 to 5.x W on higher Kernels. My laptop fan 
spins a lot more.

I read that a lot of Intel stuff has entered the Kernel in 5.3.11, could 
this cause it? Will it stay like this in the next Versions? Can I maybe 
switch something off etc. to get a lower baseline power?

I hope I write to the right address, otherwise sorry.

Greetings Guido

lscpu:

Architektur:                     x86_64
CPU Operationsmodus:             32-bit, 64-bit
Byte-Reihenfolge:                Little Endian
Adressgrößen:                    39 bits physical, 48 bits virtual
CPU(s):                          8
Liste der Online-CPU(s):         0-7
Thread(s) pro Kern:              2
Kern(e) pro Socket:              4
Sockel:                          1
NUMA-Knoten:                     1
Anbieterkennung:                 GenuineIntel
Prozessorfamilie:                6
Modell:                          142
Modellname:                      Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz
Stepping:                        10
CPU MHz:                         1072.191
Maximale Taktfrequenz der CPU:   4000,0000
Minimale Taktfrequenz der CPU:   400,0000
BogoMIPS:                        4001.60
Virtualisierung:                 VT-x
L1d Cache:                       128 KiB
L1i Cache:                       128 KiB
L2 Cache:                        1 MiB
L3 Cache:                        8 MiB
NUMA-Knoten0 CPU(s):             0-7
Vulnerability L1tf:              Mitigation; PTE Inversion; VMX 
conditional cache flushes, SMT vulnerable
Vulnerability Mds:               Vulnerable: Clear CPU buffers 
attempted, no microcode; 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
Markierungen:                    fpu vme de pse tsc msr pae mce cx8 apic 
sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr s
                                  se sse2 ss ht tm pbe syscall nx 
pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good n
                                  opl xtopology nonstop_tsc cpuid 
aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sd
                                  bg 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 ibpb stibp tpr_shadow
                                   vnmi flexpriority ept vpid ept_ad 
fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rdseed
                                  adx smap clflushopt intel_pt xsaveopt 
xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify
                                  hwp_act_window hwp_epp flush_l1d