After fresh installation of Debian on my new HP EliteBook 850 G5, wireless was not working and I found in journal iwlwifi firmware failure errors, so I installed firmware-iwlwifi and firmware-misc-nonfree packages. Network Manager started to show nearby wifi networks, but during boot journal still reported errors like below:
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kernel: Intel(R) Wireless WiFi driver for Linux
kernel: Copyright(c) 2003- 2015 Intel Corporation
kernel: iwlwifi 0000:01:00.0: enabling device (0000 -> 0002)
kernel: iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-8265-36.ucode (-2)
kernel: firmware_class: See https://wiki.debian.org/Firmware for information about missing firmware
kernel: iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-8265-36.ucode failed with error -2
kernel: iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-8265-35.ucode (-2)
kernel: iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-8265-35.ucode failed with error -2
kernel: iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-8265-34.ucode (-2)
kernel: iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-8265-34.ucode failed with error -2
kernel: iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-8265-33.ucode (-2)
kernel: iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-8265-33.ucode failed with error -2
kernel: iwlwifi 0000:01:00.0: firmware: failed to load iwlwifi-8265-32.ucode (-2)
kernel: iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-8265-32.ucode failed with error -2
kernel: iwlwifi 0000:01:00.0: firmware: direct-loading firmware iwlwifi-8265-31.ucode
kernel: iwlwifi 0000:01:00.0: loaded firmware version 31.532993.0 op_mode iwlmvm
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$ ls /lib/firmware/iwlwifi-8265-*
/lib/firmware/iwlwifi-8265-21.ucode /lib/firmware/iwlwifi-8265-27.ucode
/lib/firmware/iwlwifi-8265-22.ucode /lib/firmware/iwlwifi-8265-31.ucode
I wonder why the driver was missing? Is it correct way to fix this problem? Should I fear that something will get messed after upgrade?
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$ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux testing (buster)
Release: testing
Codename: buster
$ uname -a
Linux hp 4.16.0-2-amd64 #1 SMP Debian 4.16.12-1 (2018-05-27) x86_64 GNU/Linux