Bug#1109900: linux-image-6.16-rc7-amd64: Intel Wi-Fi broken on Linux 6.16-rc7 with firmware 99 causing iwlwifi microcode errors

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From	Salvatore Bonaccorso <carnil@debian.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1109900: linux-image-6.16-rc7-amd64: Intel Wi-Fi broken on Linux 6.16-rc7 with firmware 99 causing iwlwifi microcode errors
Date	Fri, 10 Oct 2025 16:40:01 +0200
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Hi Jennifer,

On Fri, Jul 25, 2025 at 05:34:28PM -0700, Jennifer Riley wrote:
> Package: src:linux
> Version: 6.16~rc7-1~exp1
> Severity: important
> X-Debbugs-Cc: klipo89@gmail.com
> 
> Dear Maintainer,
> 
> What led up to the situation?
> Upgraded from Linux 6.15 to 6.16-rc7 kernel.
> iwlwifi 0000:08:00.0: microcode SW error detected. Restarting 0x2000000.
> iwlwifi 0000:08:00.0: Failed to start RT ucode: -110
> 
> What exactly did you do (or not do) that was effective (or ineffective)?
> Booted into Linux 6.16-rc7, where iwlwifi loads firmware version 99 for the
> Intel BE200 device. This causes microcode software errors and prevents the Wi-
> Fi interface from initializing. Reverting to Linux 6.15 loads firmware version
> 98, which initializes the device properly and Wi-Fi works as expected. Manually
> copying firmware version 98 over the 99 file forces the driver to load the
> older, working firmware on 6.16-rc7, temporarily restoring Wi-Fi functionality.
> This indicates firmware 99 is likely buggy.
> 
> Full firmware 99 dmesg 'iwl|firmware' log here
> https://pastebin.com/raw/9TBdP50w
> 
> dmesg 'iwl|firmware' log with 98 override here
> https://pastebin.com/raw/dDQA0Csd
> 
> What was the outcome of this action?
> Wi-Fi broken on 6.16-rc7; works fine on 6.15.
> 
> What outcome did you expect instead?
> Wi-Fi should work on 6.16-rc7 as it did on 6.15.

While not identical, I suspect the issue might be releated to same
issues as for #1115268.

Could you please explicitly test 6.16.10-1 now and report back if the
issue is gone?

Regards,
Salvatore

Thread

Bug#1109900: linux-image-6.16-rc7-amd64: Intel Wi-Fi broken on Linux 6.16-rc7 with firmware 99 causing iwlwifi microcode errors Jennifer Riley <klipo89@gmail.com> - 2025-07-26 02:40 +0200
  Bug#1109900: linux-image-6.16-rc7-amd64: Intel Wi-Fi broken on Linux 6.16-rc7 with firmware 99 causing iwlwifi microcode errors Salvatore Bonaccorso <carnil@debian.org> - 2025-10-10 16:40 +0200
    Bug#1109900: linux-image-6.16-rc7-amd64: Intel Wi-Fi broken on Linux 6.16-rc7 with firmware 99 causing iwlwifi microcode errors Jennifer Riley <klipo89@gmail.com> - 2025-10-10 19:40 +0200
  Processed: Re: Bug#1109900: linux-image-6.16-rc7-amd64: Intel  Wi-Fi broken on Linux 6.16-rc7 with firmware 99 causing iwlwifi microcode  errors "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-10-10 16:40 +0200
  Bug#1109900: closing 1109900 Salvatore Bonaccorso <carnil@debian.org> - 2025-10-11 10:40 +0200
    Processed: closing 1109900 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-10-11 10:40 +0200

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