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
Created attachment 282607 [details] hardware information
*** Bug 203511 has been marked as a duplicate of this bug. ***
please attach the output of "grep . /sys/devices/system/cpu/cpu0/cpufreq/*"
Bug closed as there is no response from the bug reporter. Please feel free to reopen it if you can reproduce the problem with the latest upstream kernel.