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FS#73434 - [linux-firmware] 20220119 new format not recognize

Attached to Project: Arch Linux
Opened by Jon L (JonBL) - Thursday, 20 January 2022, 19:32 GMT
Last edited by Andreas Radke (AndyRTR) - Saturday, 05 February 2022, 16:57 GMT
Task Type Support Request
Category Packages: Testing
Status Closed
Assigned To Tobias Powalowski (tpowa)
Andreas Radke (AndyRTR)
Jan Alexander Steffens (heftig)
Laurent Carlier (lordheavy)
Architecture x86_64
Severity Critical
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No


The latest version completely broke my system, if only temporarily.

Last known good: linux-firmware-20220111.13dca28-1
Broken upon: linux-firmware-20220119.0c6a763-2

I'm guessing this also needs to be configured in the kernel in order to recognize the compression, however it's not readily apparent to me where. You'll definitely want to give a heads up to people about this one and maybe implement some sort of feature check if the kernel config is available. It could be something as simple as:
zcat /proc/config.gz | grep -qE 'CONFIG_????=y' || echo "fail"
This task depends upon

Closed by  Andreas Radke (AndyRTR)
Saturday, 05 February 2022, 16:57 GMT
Reason for closing:  Not a bug
Additional comments about closing:  The issue has been fixed, as reported by the author of the issue in the comments
Comment by loqs (loqs) - Thursday, 20 January 2022, 19:51 GMT
Is your custom kernel missing CONFIG_FW_LOADER_COMPRESS=y ?
Comment by Doug Newgard (Scimmia) - Thursday, 20 January 2022, 22:35 GMT
Or are you using a really old kernel?

Edit: Oh, I see they got xz compressed; I would thinking they were zstd. It would have to be REALLY old.
Comment by Tobias Powalowski (tpowa) - Friday, 21 January 2022, 07:00 GMT
You need at least kernel 5.3.
Comment by Andreas Radke (AndyRTR) - Friday, 21 January 2022, 07:05 GMT
xz compression is the only one supported.

check for zcat /proc/config.gz | grep CONFIG_FW_LOADER_COMPRESS to be set to "y" and your kernel needs to be at least 5.3.x
Comment by Jon L (JonBL) - Friday, 21 January 2022, 19:11 GMT
CONFIG_FW_LOADER_COMPRESS fixed it right up, thank you. I also updated the extensions on CONFIG_EXTRA_FIRMWARE and it took them all in without a hitch.

After thinking about it some more /proc/config may not be readily available for security reasons. It may be safer to just leave the GFX firmware uncompressed for a time to allow people the chance to recover.

Edit: Just realized I forgot the kernel version. It's linux-hardened-5.15 with more of a bare-bones config.
Comment by Dominik Rauh (dmrauh) - Tuesday, 25 January 2022, 16:48 GMT
I'm currently on Kernel 5.16.2-arch1-1 and thus "CONFIG_FW_LOADER_COMPRESS" is set to "y".

In spite of this, the Bluetooth module of my Intel AX200 doesn't work anymore. The driver
complains that it can't find the firmware files. As soon as I decompress the firmware files
manually and reboot, it is working again.

Strangely the WiFi part was working fine all along. Could this be a bug on part of the
Bluetooth driver?


This was because the now compressed firmware files were missing from the initramfs.
Adding them by means of "mkinitcpio.conf", made Bluetooth work again as expected.