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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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The firmware worked normally once it was moved into the stable kernel
branch, there was a bug with that specific iwlwifi firmware update that was
retracted. I have not encountered this again.

On Fri, Oct 10, 2025 at 7:33 AM Salvatore Bonaccorso <carnil@debian.org>
wrote:

> Control: tags -1 + moreinfo
>
> 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
>

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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

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