https://bugzilla.kernel.org/show_bug.cgi?id=203513
Bug ID: 203513
Summary: Turbo Boost can't be disabled with no_turbo
Product: ACPI
Version: 2.5
Kernel Version: 5.0.0-13-generic
Hardware: Intel
OS: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: Power-Processor
Assignee: acpi_power-proces...@kernel-bugs.osdl.org
Reporter: ertaner...@gmail.com
Regression: No
Hi All,
no_turbo can not work exacly at Linux Kernel 5.0.0-13 version on Kubuntu 19.04,
here is my leptop info, This leptop get correct result with kernel 4.** via
no_turbo and when I was disable turbo mode my cpu MHz never up to more than
2600 MHz at Linux kernel 4.*
https://ark.intel.com/content/www/us/en/ark/products/64891/intel-core-i7-3720qm-processor-6m-cache-up-to-3-60-ghz.html
*-cpu
description: CPU
product: Intel(R) Core(TM) i7-3720QM CPU @ 2.60GHz
vendor: Intel Corp.
physical id: 41
bus info: cpu@0
version: Intel(R) Core(TM) i7-3720QM CPU @ 2.60GHz
slot: SOCKET 0
size: 2346MHz
capacity: 3800MHz
width: 64 bits
clock: 100MHz
capabilities: x86-64 fpu fpu_exception wp 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 rdtscp constant_tsc arch_perfmon pebs bts rep_good nopl
xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx
smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt
tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm cpuid_fault epb pti ssbd
ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms
xsaveopt dtherm ida arat pln pts flush_l1d cpufreq
configuration: cores=4 enabledcores=4 threads=8
root@homless:/# cat /sys/devices/system/cpu/intel_pstate/no_turbo
1
root@homless:/# cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_max_freq
2600000
2600000
2600000
2600000
2600000
2600000
2600000
2600000
root@homless:/# cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_max_freq
3600000
3600000
3600000
3600000
3600000
3600000
3600000
3600000
root@homless:/# cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_min_freq
1200000
1200000
1200000
1200000
1200000
1200000
1200000
1200000
root@homless:/# cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
powersave
powersave
powersave
powersave
powersave
powersave
powersave
powersave
Test Result;
vlc vlc://nop --repeat #result @3200Mhz
while true; do true; done # result #2600MHZ
stress -c 4 # result #2600MHZ
from past, " https://bugzilla.kernel.org/show_bug.cgi?id=97261 " I think
similar situation
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