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Bug#890365: marked as done (linux-image 4.14 messing up with CPU frequency)

Your message dated Sun, 23 May 2021 04:54:50 -0700 (PDT)
with message-id <60aa428a.1c69fb81.71d3d.6432@mx.google.com>
and subject line Closing this bug (BTS maintenance for src:linux bugs)
has caused the Debian Bug report #890365,
regarding linux-image 4.14 messing up with CPU frequency
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
890365: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=890365
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message ---
Package: linux-image-4.14.0-0.bpo.3-amd64
Distro: Debian 9 Stretch

When I try to set CPU frequency to the minimum, it doesn't work. This works perfectly with kernel 4.9.5 (but with 4.9.5 I cannot hibernate).

Steps to reproduce the bug:

Have this in your grub: GRUB_CMDLINE_LINUX_DEFAULT="intel_pstate=disable"

su
cpufreq-set -c 0 -g userspace
cpufreq-set -c 0 -f 400MHz

With kernel 4.9 this resulted in the cpu running cold and silently at 400 MHz (check with cpufreq-info or with mate indicator applet).

After updating to 4.14 (linux-image-4.14.0-0.bpo.3-amd64 and corresponding linux-header) the above mentioned use of cpufreq-set sets a variable frequency policy.

Remark: this is happening too in Ubuntu 16.04 with kernel 4.10 and 4.13, so probably the bug was introduced in 4.10. 

(remark: reportbug is crashing in my system and that is why I send an email. See screen capture at https://unix.stackexchange.com/questions/424037/how-do-i-report-a-bug-to-debian-when-reportbug-crashes-because-it-has-itself-an)

Please send further instructions to provide any kind of log you need.

Thanks.


--
--------------------------------------------------------------------------------
Eduardo Guerras Valera
Homer L. Dodge Department of Physics and Astronomy
440 W. Brooks St. - Norman, OK 73019-0225 - USA
--------------------------------------------------------------------------------

--- End Message ---
--- Begin Message --- 
Hi

This bug was filed for a very old kernel or the bug is old itself
without resolution.

If you can reproduce it with

- the current version in unstable/testing
- the latest kernel from backports

please reopen the bug, see https://www.debian.org/Bugs/server-control
for details.

Regards,
Salvatore

--- End Message ---
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