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"

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

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


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

Reply via email to