Help to configure automatic fan speed and cpu frequency on ThinkPad X260

[Joel Carnat]

I noticed that the ISO I used was a bit old. So I upgraded the system 
from source. I now run v5.8.3.33. But that doesn't solve the problem.

But I noticed the problem only occurs since I start Xorg. And I could 
notice the following message:
error: [drm:pid-1:csr_load_work_fn] *ERROR* Failed to load DMC firmware 
[https://01.org/linuxgraphics/intel-linux-graphics-firmwares], disabling 
runtime power management.

I've search for solutions but couldn't find any. I have the following 
modules loaded:
$ kldstat
Id Refs Address            Size     Name
  1   37 0xffffffff80200000 1eb45f0  kernel
  2    1 0xffffffff820b5000 73f88    ehci.ko
  3    1 0xffffffff82129000 81680    xhci.ko
  4    2 0xffffffff821ab000 107850   dm.ko
  5    1 0xffffffff822b3000 4be38    dm_target_crypt.ko
  6    1 0xffffffff82fff000 34708    acpi_thinkpad.ko
  7    2 0xffffffff83034000 1adc8    led.ko
  8    1 0xffffffff8304f000 2b128    acpi_video.ko
  9    1 0xffffffff8307b000 18280    corepower.ko
10    2 0xffffffff83094000 ed18a8   drm.ko
11    2 0xffffffff83f66000 2f248    iicbus.ko
12    1 0xffffffff83f96000 1e0d008  i915.ko
13    1 0xffffffff85da4000 215a28   iwm8000Cfw.ko
14    1 0xffffffff85fba000 2fa0     i915fw_skl_dmc_ver1.ko
15    1 0xffffffff85fbd000 2d80     i915fw_bxt_dmc_ver1.ko
16    1 0xffffffff85fc0000 2f60     i915fw_kbl_dmc_ver1.ko
17    1 0xffffffff85fc3000 1b920    i915fw_skl_guc_ver1.ko
18    1 0xffffffff85fdf000 20200    i915fw_skl_guc_ver4.ko
19    1 0xffffffff86000000 204c0    i915fw_skl_guc_ver6.ko
20    1 0xffffffff86a00000 150000   if_iwm.ko

Any idea how to solve that drm error?

Thanks,
Joel

On 24/04/2021 18:38, Joel Carnat wrote:
> Hello,
> 
> I am discovering DragonflyBSD v5.8.3 on a ThinkPad X260.
> 
> I have read and configure the system according to the documentation I 
> found on the website and various man pages I read. But the fan keeps 
> blowing, even when the system is IDLE. And as far as I can tell, the CPU 
> frequency doesn't seem to go to its minimum value ; which probably leads 
> to the fan issue.
> 
> Here's what I have configured:
> 
> $ /boot/loader.conf
> acpi_thinkpad_load="YES"
> acpi_video_load="YES"
> drm_load="YES"
> 
> $ /etc/rc.conf
> powerd_enable="YES"
> #powerd_flags="-u 7 -r 0.2 -T 60"
> 
> $ /etc/sysctl.conf
> hw.acpi.cpu.cx_lowest=C3
> machdep.mwait.CX.idle=AUTODEEP
> 
> The CPU is "Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz".
> 
> I have attached extracts from sysctl.
> 
> I already ran OpenBSD 6.x and FreeBSD 13 on that particular machine and 
> when idling, then fan becomes silent. So there must be something I do 
> wrong with my dfly configuration.
> 
> Any advices?
> 
> Thank you,
> Joel
>