Looking for advise about optional i915 DMC firmware

From	"Thomas Schmitt" <scdbackup@gmx.net>
Newsgroups	linux.debian.user
Subject	Looking for advise about optional i915 DMC firmware
Date	2020-07-24 21:20 +0200
Message-ID	<AwboB-2JD-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hi,

my new computer reports at boot time that some graphics firmware is
missing:

[    1.158505] i915 0000:00:02.0: firmware: failed to load i915/kbl_dmc_ver1_04.bin (-2)
[    1.158507] firmware_class: See https://wiki.debian.org/Firmware for information about missing firmware
[    1.158508] i915 0000:00:02.0: Direct firmware load for i915/kbl_dmc_ver1_04.bin failed with error -2
[    1.158509] i915 0000:00:02.0: Failed to load DMC firmware i915/kbl_dmc_ver1_04.bin. Disabling runtime power management.
[    1.158510] i915 0000:00:02.0: DMC firmware homepage: https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/i915

LXDE works despite these messages.
The web says that DMC is about power saving in Intel graphics.
  https://01.org/linuxgraphics/downloads/firmware
  "DMC provides additional graphics low-power idle states. It provides
   capability to save and restore display registers across these
   low-power states independently from the OS/Kernel."

The desired firmware file seems to be indeed available at
  https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/i915/kbl_dmc_ver1_04.bin
but the given Debian wiki page is refering to Debian 8 as newest and
also i cannot find a tangible hint how to install such firmware after the
initial installation was already done (from netinst).

My questions:
- How desirable or undesirable is to install this particular firmware ?
- If i decide to do it: how to proceed ?


Have a nice day :)

Thomas

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Thread

Looking for advise about optional i915 DMC firmware "Thomas Schmitt" <scdbackup@gmx.net> - 2020-07-24 21:20 +0200
  Re: Looking for advise about optional i915 DMC firmware Dan Ritter <dsr@randomstring.org> - 2020-07-24 21:30 +0200
    [SOLVED] Re: Looking for advise about optional i915 DMC firmware "Thomas Schmitt" <scdbackup@gmx.net> - 2020-07-25 17:00 +0200

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