I would really like to find out why my cpu's keep reverting back to a cpu powersave mode after I get a kernel update then reboot.
I cleaned my laptops vent but this seems to happen whenever a new kernel is updated and installed.
I type in watch -n1 "cat /proc/cpuinfo | grep MHz" (to see cpu's)
s-tui (s-tui command output below)
rt@sys76:~$ dpkg -l *freq* | grep ii
rt@sys76:~$
rt@sys76:~$ sudo turbostat --Summary --quiet --show Busy%,Bzy_MHz,PkgTmp,PkgWatt,GFXWatt,IRQ --interval 6
Busy% Bzy_MHz IRQ PkgTmp PkgWatt GFXWatt
2.95 800 3347 47 2.16 0.01
2.76 800 3069 49 2.15 0.01
5.85 800 5122 48 2.73 0.01
11.87 800 8008 47 3.41 0.04
8.23 800 5778 47 2.86 0.05
rt@sys76:~$ lscpu
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): 8
On-line CPU(s) list: 0-7
Thread(s) per core: 2
Core(s) per socket: 4
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 60
Model name: Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
Stepping: 3
CPU MHz: 798.103
CPU max MHz: 3400.0000
CPU min MHz: 800.0000
BogoMIPS: 4788.65
Virtualization: VT-x
L1d cache: 128 KiB
L1i cache: 128 KiB
L2 cache: 1 MiB
L3 cache: 6 MiB
NUMA node0 CPU(s): 0-7
Vulnerability Itlb multihit: KVM: Mitigation: Split huge pages
Vulnerability L1tf: Mitigation; PTE Inversion; VMX conditional cache flushes, SMT vulne
rable
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 sanitizatio
n
Vulnerability Spectre v2: Mitigation; Full generic retpoline, IBPB conditional, IBRS_FW, STIB
P conditional, RSB filling
Vulnerability Srbds: Mitigation; Microcode
Vulnerability Tsx async abort: Not affected
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat p
se36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdp
e1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xto
pology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds
_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 m
ovbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ab
m cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shado
w vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 s
mep bmi2 erms invpcid xsaveopt dtherm ida arat pln pts md_clear flu
sh_l1d
rt@sys76:~$
rt@sys76:~$ grep . /sys/devices/system/cpu/intel_pstate/*
/sys/devices/system/cpu/intel_pstate/max_perf_pct:100
/sys/devices/system/cpu/intel_pstate/min_perf_pct:23
/sys/devices/system/cpu/intel_pstate/no_turbo:1
/sys/devices/system/cpu/intel_pstate/num_pstates:27
/sys/devices/system/cpu/intel_pstate/status:active
/sys/devices/system/cpu/intel_pstate/turbo_pct:38
rt@sys76:~$ sensors
BAT0-acpi-0
Adapter: ACPI interface
in0: 0.00 V
curr1: 0.00 A
coretemp-isa-0000
Adapter: ISA adapter
Package id 0: +48.0°C (high = +84.0°C, crit = +100.0°C)
Core 0: +47.0°C (high = +84.0°C, crit = +100.0°C)
Core 1: +45.0°C (high = +84.0°C, crit = +100.0°C)
Core 2: +45.0°C (high = +84.0°C, crit = +100.0°C)
Core 3: +46.0°C (high = +84.0°C, crit = +100.0°C)
acpitz-acpi-0
Adapter: ACPI interface
temp1: +14.0°C (crit = +120.0°C)
rt@sys76:~$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 60
model name : Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
stepping : 3
microcode : 0x28
cpu MHz : 798.079
cache size : 6144 KB
physical id : 0
siblings : 8
core id : 0
cpu cores : 4
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
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 arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 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 xsaveopt dtherm ida arat pln pts md_clear flush_l1d
bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit srbds
bogomips : 4788.65
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 60
model name : Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
stepping : 3
microcode : 0x28
cpu MHz : 798.108
cache size : 6144 KB
physical id : 0
siblings : 8
core id : 1
cpu cores : 4
apicid : 2
initial apicid : 2
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
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 arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 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 xsaveopt dtherm ida arat pln pts md_clear flush_l1d
bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit srbds
bogomips : 4788.65
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:
processor : 2
vendor_id : GenuineIntel
cpu family : 6
model : 60
model name : Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
stepping : 3
microcode : 0x28
cpu MHz : 798.103
cache size : 6144 KB
physical id : 0
siblings : 8
core id : 2
cpu cores : 4
apicid : 4
initial apicid : 4
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
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 arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 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 xsaveopt dtherm ida arat pln pts md_clear flush_l1d
bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit srbds
bogomips : 4788.65
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:
processor : 3
vendor_id : GenuineIntel
cpu family : 6
model : 60
model name : Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
stepping : 3
microcode : 0x28
cpu MHz : 798.114
cache size : 6144 KB
physical id : 0
siblings : 8
core id : 3
cpu cores : 4
apicid : 6
initial apicid : 6
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
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 arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 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 xsaveopt dtherm ida arat pln pts md_clear flush_l1d
bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit srbds
bogomips : 4788.65
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:
processor : 4
vendor_id : GenuineIntel
cpu family : 6
model : 60
model name : Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
stepping : 3
microcode : 0x28
cpu MHz : 798.405
cache size : 6144 KB
physical id : 0
siblings : 8
core id : 0
cpu cores : 4
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
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 arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 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 xsaveopt dtherm ida arat pln pts md_clear flush_l1d
bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit srbds
bogomips : 4788.65
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:
processor : 5
vendor_id : GenuineIntel
cpu family : 6
model : 60
model name : Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
stepping : 3
microcode : 0x28
cpu MHz : 798.234
cache size : 6144 KB
physical id : 0
siblings : 8
core id : 1
cpu cores : 4
apicid : 3
initial apicid : 3
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
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 arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 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 xsaveopt dtherm ida arat pln pts md_clear flush_l1d
bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit srbds
bogomips : 4788.65
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:
processor : 6
vendor_id : GenuineIntel
cpu family : 6
model : 60
model name : Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
stepping : 3
microcode : 0x28
cpu MHz : 798.202
cache size : 6144 KB
physical id : 0
siblings : 8
core id : 2
cpu cores : 4
apicid : 5
initial apicid : 5
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
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 arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 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 xsaveopt dtherm ida arat pln pts md_clear flush_l1d
bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit srbds
bogomips : 4788.65
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:
processor : 7
vendor_id : GenuineIntel
cpu family : 6
model : 60
model name : Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
stepping : 3
microcode : 0x28
cpu MHz : 798.235
cache size : 6144 KB
physical id : 0
siblings : 8
core id : 3
cpu cores : 4
apicid : 7
initial apicid : 7
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
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 arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 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 xsaveopt dtherm ida arat pln pts md_clear flush_l1d
bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit srbds
bogomips : 4788.65
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:
rt@sys76:~$
rt@sys76:~$ grep . cat /sys/devices/system/cpu/cpu0/cpufreq/*
grep: cat: No such file or directory
/sys/devices/system/cpu/cpu0/cpufreq/affected_cpus:0
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq:3400000
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq:800000
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency:0
/sys/devices/system/cpu/cpu0/cpufreq/related_cpus:0
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors:performance powersave
/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq:798109
/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver:intel_pstate
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor:performance
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq:2400000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq:1615686
/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed:<unsupported>
rt@sys76:~$
rt@sys76:~$ echo 85 | sudo tee /sys/devices/system/cpu/intel_pstate/max_perf_pct
[sudo] password for rt:
85
rt@sys76:~$ echo 100 | sudo tee /sys/devices/system/cpu/intel_pstate/max_perf_pct
100
rt@sys76:~$ sudo su
root@sys76:/home/rt# for file in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do echo "powersave" > $file; done
kern.log
Sep 27 16:27:55 sys76 kernel: [ 0.394389] mce: CPU0: Thermal monitoring enabled (TM1)
Sep 27 16:27:55 sys76 kernel: [ 0.608061] pnp: PnP ACPI: found 8 devices
Sep 27 16:27:55 sys76 kernel: [ 0.611443] thermal_sys: Registered thermal governor 'fair_share'
Sep 27 16:27:55 sys76 kernel: [ 0.611445] thermal_sys: Registered thermal governor 'bang_bang'
Sep 27 16:27:55 sys76 kernel: [ 0.611448] thermal_sys: Registered thermal governor 'step_wise'
Sep 27 16:27:55 sys76 kernel: [ 0.611449] thermal_sys: Registered thermal governor 'user_space'
Sep 27 16:27:55 sys76 kernel: [ 0.611451] thermal_sys: Registered thermal governor 'power_allocator'
Sep 27 16:27:55 sys76 kernel: [ 1.006274] thermal LNXTHERM:00: registered as thermal_zone0
syslog
Sep 27 16:27:55 sys76 systemd[1]: Started Thermal Daemon Service.
Sep 27 16:27:55 sys76 thermald[1471]: 13 CPUID levels; family:model:stepping 0x6:3c:3 (6:60:3)
Sep 27 16:27:55 sys76 thermald[1471]: 13 CPUID levels; family:model:stepping 0x6:3c:3 (6:60:3)
Sep 27 16:27:55 sys76 thermald[1471]: Polling mode is enabled: 4
Sep 27 16:27:55 sys76 thermald[1471]: sensor id 5 : No temp sysfs for reading raw temp
Sep 27 16:27:55 sys76 thermald[1471]: message repeated 2 times: [ sensor id 5 : No temp sysfs for reading raw temp]
Sep 27 16:27:55 sys76 kernel: [ 0.611443] thermal_sys: Registered thermal governor 'fair_share'
Sep 27 16:27:55 sys76 kernel: [ 0.611445] thermal_sys: Registered thermal governor 'bang_bang'
Sep 27 16:27:55 sys76 kernel: [ 0.611448] thermal_sys: Registered thermal governor 'step_wise'
Sep 27 16:27:55 sys76 kernel: [ 0.611449] thermal_sys: Registered thermal governor 'user_space'
Sep 27 16:27:55 sys76 kernel: [ 0.611451] thermal_sys: Registered thermal
Requested inormation link (was very large couldn't post here):
https://pastebin.com/px7zci4x
Other links I've found but it didn't solve the problem:
https://community.intel.com/t5/Processors/Intel-CPU-CONSTANTLY-Throttled-to-Lowest-Frequency-Ubuntu-20-04/td-p/1253691
Ubuntu 20.04.1 LTS Significant Throttling of Intel i7 Processor
https://unix.stackexchange.com/questions/632339/intel-cpu-constantly-throttled-to-lowest-frequency-ubuntu-20-04
Intel Core i7-8550U cpu frequency drops on high loads on Ubuntu 20.04
