[SOLVED] Firmware loading failure & microcode

bayou self · 01-08-2022, 08:08 AM

Booting my new LFS 11.0, I get this error message:

Code:

Failed to load DMC firmware i915/skl_dmc_ver1_27.bin. Disabling runtime power management.

I went to the firmware homepage that was given, and downloaded the file.
Using make menuconfig,
-> Device Drivers
--> Generic Driver Options
---> Firmware loader
----> Build named firmware blobs into the kernel binary

I typed skl_dmc_ver1_27.bin where it asks for a string value.

The
----> Firmware blobs root directory
is /lib/firmware.

Now, when I recompile the kernel, I get

Code:

***No rule to make target '/lib/firmware/skl_dmc_ver1_27.bin/skl_dmc_ver1_27.bin',needed by 'drivers/base/firmware_loader/builtin/skl_dmc_ver_27.bin.gen.o'. Stop.

and several Error 2 messages.

I followed the BLFS About Firmware instructions for "Intel Microcode for the CPU", and got as far as adding a line to /boot/grub/grub.cfg. My grub.cfg on the debian host system said not to edit that file, so I tried adding the line to /etc/grub.d/40_custom.

No change.

arch-linq · 01-08-2022, 04:41 PM

add i915 to /lib/firmware and use that in kernel module path i915/skl_dmc_ver1_27.bin then recompile kernel. Gotta use the right dirs for firmware.

Archetech

bayou self · 01-08-2022, 05:16 PM

Hi Archetech and thanks for your help!
Just want to make sure I understand...you are saying to add a subdirectory named i915 and place the file in it, so that I have

Code:

/lib/firmware/i915/skl_dmc_ver1_27.bin

, correct?
Then update the menuconfig and recompile?

bayou self · 01-08-2022, 06:43 PM

I did this, and I'm still getting the "No rule to make target..." message.

bayou self · 01-09-2022, 04:26 PM

I fixed a mistake in the "Firmware blobs root directory", which got rid of the "No rule..." error.
Still getting original error.
I ran make mrproper.
I'm going to create a /boot partition, and re-install Grub.