XPS 13 (Core i5-10210U) with performance governor idles (0.2% usage) at
4 GHz instead of 900 MHz.
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Title:
intel_pstate not working.
Personally I've disabled pstate driver from kernel command line. Events
like suspend, lid close and restart completely changes the behavior.
While working on battery I sometimes will close the lid and when I open
back CPU is at 4Ghz and battery gets drained in 30mins. Not to mention
the heating.
Thinkpad T460 with Intel(R) Core(TM) i7-6600U CPU @ 2.60GHz
Recently went Ubuntu 16.04 -> 18.04.
Using intel_pstate in default configuration.
HWE low latency kernel:
Linux machine 5.3.0-62-lowlatency #56~18.04.1-Ubuntu SMP PREEMPT Wed Jun
24 16:57:19 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
and again. it got stuck. even with the intel_pstate=no_hwp kernel
parameter.Damn!
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Title:
intel_pstate not working. CPU frequency
After a few days of Testing two Ubuntu Installations on the same laptop,
one with the intel_pstate=no_hwp and one without, this seems like a
valid solution for me. Until now the Frequency never got stuck again
@800MHz with the kernel parameter intel_pstate=no_hwp set.
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After disabling the Speed Step in BIOS everythig seems to work fine...
Until i Suspended my Notebook. After That the Frequency was stuck again
@800MHz.
I'm now testing the Kernel Parameter intel_pstate=no_hwp
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux (Ubuntu Bionic)
Status: New => Confirmed
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I had the same Problem with the CPU in my Lenovo T470s. Intel(R)
Core(TM) i5-6300U CPU @ 2.40GHz
i tried intel_pstate=disable which did fix the stuck @ 800 MHz Problem.
But Managing CPU govenors ans frequencies was still kind of broken with
Kernel 5.3.0-40.
So I deleted the intel_pstate kernel
Hello there,
I'd like to just note, that I had the same problem with 18.04 LTS HWE
(5.0.0-23-generic) and an i5-8350U, but mine was clocking around 3.6GHz on each
core.
Upgrade to 5.0.0-31-generic has resolved this issue with intel_pstate driver,
but using the kernel parameter
** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Released
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
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I upgraded to Ubuntu 19.04, and the issue didn't reproduce with default
installed kernel 5.0.0-27-generic. Issue still reproduces with Ubuntu
18.04.
Should I close this issue?
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If v4.17 works and (presumably) v4.18-rc1 doesn't work, perform a
bisection between theses two version to find the regression point.
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** Description changed:
intel_pstate not working. CPU frequency fixed at 800MHz.
I've tried to modify frequency using "cpufreq-set" and also by directly
writing to files in "/sys/devices/system/cpu/cpu0/cpufreq/*" to no
success.
I tried different versions of kernel, it started
@kaihengfeng I'm unable to boot with v5.3-rc2
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Title:
intel_pstate not working. CPU frequency fixed at 800MHz. No cpu
frequency
@kaihengfeng I'll test and post the results soon.
@anthonywong If I disable pstate with "intel_pstate=disable", frequency
goes up to 1000Mhz max, also laptop runs very hot and battery lasts
30-60mins without pstate.
On Windows 10 CPU goes all the way to 4.1GHz so it's not a hardware
issue. Linux
Does the problem go away if "intel_pstate=disable" is provided in kernel
cmdline?
There were many accounts of CPU being stuck at 800MHz, and they were not caused
by OS at all:
https://forums.bit-tech.net/index.php?threads/solved-laptop-stuck-at-800mhz.338423/
Please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.3-rc2/
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Title:
intel_pstate not working. CPU
CPU frequency does not increase under heavy load.
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Title:
intel_pstate not working. CPU frequency fixed at 800MHz. No cpu
Setting specific CPU frequencies via cpufreq-set is incompatible with the
intel_pstate driver.
Is your problem about unable to fix the CPU to specific frequencies, or the CPU
frequencies do not increase even you are under heavy workload?
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