@MikeR: Thanks. I downloaded the missing bin files as you explained in #7 and get rid of the errors. However, my wifi was NOT coming back under kernel 5.11.x (still worked fine when booting 5.8.x)
In my case (Broadcom BCM4313 802.11ac), I had to install a different (backported) version of the bcmwl-kernel-source package, see https://askubuntu.com/questions/1356061/bcm4352-802-11ac-wireless-network-adapter-not-working-on-kernel-5-11-and-ubuntu -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to initramfs-tools in Ubuntu. https://bugs.launchpad.net/bugs/1938983 Title: missing modules after 5.11.0-25-generic update Status in initramfs-tools package in Ubuntu: Confirmed Bug description: After updating to kernel 5.11.0-25-generic wireless driver failed to recognize WiFi card. Possible reasons/symptoms: $ sudo update-initramfs -u -k all update-initramfs: Generating /boot/initrd.img-5.11.0-25-generic W: Possible missing firmware /lib/firmware/i915/skl_guc_49.0.1.bin for module i915 W: Possible missing firmware /lib/firmware/i915/bxt_guc_49.0.1.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_guc_49.0.1.bin for module i915 W: Possible missing firmware /lib/firmware/i915/glk_guc_49.0.1.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_guc_49.0.1.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_guc_49.0.1.bin for module i915 W: Possible missing firmware /lib/firmware/i915/cml_guc_49.0.1.bin for module i915 W: Possible missing firmware /lib/firmware/i915/icl_guc_49.0.1.bin for module i915 W: Possible missing firmware /lib/firmware/i915/ehl_guc_49.0.1.bin for module i915 W: Possible missing firmware /lib/firmware/i915/ehl_guc_49.0.1.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_huc_7.5.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_guc_49.0.1.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_huc_7.5.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_guc_49.0.1.bin for module i915 W: Possible missing firmware /lib/firmware/i915/dg1_dmc_ver2_02.bin for module i915 update-initramfs: Generating /boot/initrd.img-5.8.0-63-generic $ lsb_release -a LSB Version: core-11.1.0ubuntu2-noarch:security-11.1.0ubuntu2-noarch Distributor ID: Ubuntu Description: July2021 Release: 20.04 Codename: focal Workaround: connected Ethernet. (Inconvenient) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1938983/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp