22.04 802.11 (wifi) firmware failure

I just updated in place (no new harddrive, no new partitions) from 20.04LTS to 22.04LTS. Everything worked except that there is a firmware loading diagnostic (along with a separate failure to compile the VMWare kernel support -- but that may be a VMWare issue, not Ubuntu). Thus, the 802.11 hardware is NOT "seen" by the kernel, etc. (I am using bluetooth to Android phone to our 802.11 network to get to the Internet right now -- not the laptop 802.11). The relevant section of the dmesg log seems to be: [ 30.805966] kernel: iwlwifi 0000:3d:00.0: Failed to load firmware chunk!
[ 30.814167] kernel: iwlwifi 0000:3d:00.0: iwlwifi transaction failed, dumping registers
[ 30.831295] kernel: iwlwifi 0000:3d:00.0: iwlwifi device config registers:
[ 30.841152] kernel: iwlwifi 0000:3d:00.0: 00000000: 08b18086 00100406 0280006b 00000010 d0100004 00000000 00000000 00000000
[ 30.858325] kernel: iwlwifi 0000:3d:00.0: 00000020: 00000000 00000000 00000000 c0708086 00000000 000000c8 00000000 00000100
[ 30.873937] kernel: iwlwifi 0000:3d:00.0: 00000040: 00020010 10008ec0 00130c10 0106ec11 101100ca 00000000 00000000 00000000
[ 30.888621] kernel: iwlwifi 0000:3d:00.0: 00000060: 00000000 00080812 00000405 00000000 00010001 00000000 00000000 00000000
[ 30.903224] kernel: iwlwifi 0000:3d:00.0: 00000080: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 30.918557] kernel: iwlwifi 0000:3d:00.0: 000000a0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 30.934480] kernel: iwlwifi 0000:3d:00.0: 000000c0: 00000000 00000000 c823d001 0d000000 00814005 fee003f8 00000000 00000000
[ 30.951475] kernel: iwlwifi 0000:3d:00.0: 000000e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 30.969958] kernel: iwlwifi 0000:3d:00.0: 00000100: 14010001 00004000 00000000 00462031 00002000 00002000 0000000e 00000000
[ 30.989997] kernel: iwlwifi 0000:3d:00.0: 00000120: 00000000 00000000 0000000

and more. The machine is a HP Zbook G2 that had no issues with Ubuntu 20.04LTS. Any help would be appreciated. Would it work to downgrade the firmware .deb to 20.04LTS or would this be not compatible with the current 22.04LTS production kernel or environment. If downgrading would work, please provide "detailed" instructions (e.g., the apt command invocations to use).