Re: slower Debian 11 after upgrade from 10

[Greg Wooledge <greg@wooledge.org>]

On Tue, Oct 05, 2021 at 03:10:50AM +0000, L Dimov wrote:
> I am having slower performance on Debian 11 [...]

I'm guessing you mean slow video performance.

> dmesg | grep -i firmware
> [    2.072553] i915 0000:00:02.0: firmware: failed to load i915/kbl_dmc_ver1_04.bin (-2)
> [    2.072556] firmware_class: See https://wiki.debian.org/Firmware for information about missing firmware
> [    2.072558] i915 0000:00:02.0: Direct firmware load for i915/kbl_dmc_ver1_04.bin failed with error -2
> [    2.072559] i915 0000:00:02.0: [drm] Failed to load DMC firmware i915/kbl_dmc_ver1_04.bin. Disabling runtime power management.
[...]

> So as far as I can tell, I need i915/kbl_dmc_ver1_04.bin, ar3k/AthrBT_0x31010000.dfu, rtl_nic/rtl8153a-3.fw, and rtl_nic/rtl8153a-3.fw. Is that true? And if yes, how do go about getting them?

In general, you can search for the specific filenames on
http://packages.debian.org/ to see which packages you need, and then
install those packages.

You'll either need to download the packages manually (not recommended),
or add contrib and non-free to your sources.list.  Doing the latter allows
you to receive upgrades to these packages in the future, so it's the
recommended way.

See <https://wiki.debian.org/SourcesList#Example_sources.list> for
specific syntax.

After editing sources.list, "apt update" and then "apt install pkgnames".

Here are two of them:

unicorn:~$ dpkg -S i915/kbl_dmc_ver1_04.bin
firmware-misc-nonfree: /lib/firmware/i915/kbl_dmc_ver1_04.bin
unicorn:~$ dpkg -S rtl_nic/rtl8153a-3.fw
firmware-realtek: /lib/firmware/rtl_nic/rtl8153a-3.fw

You can use packages.debian.org, or apt-file, to get the names of the rest.