Re: [REGRESSION] The iwl4965 driver broke somewhere between 6.10.10 and 6.11.5 (probably 6.11rc)

[Kalle Valo <kvalo@kernel.org>]

(dropping stable, adding linux-wireless)

"Alf Marius" <post@alfmarius.net> writes:

> Hi,
> I recently installed Arch Linux on an old laptop (Fujitsu-Siemens AMILO Xi 2550) and noticed that:
>
> - when booting Linux from the Arch ISO (kernel version 6.10.10) WIFI is working fine
> - after installing Arch Linux from the ISO and booting (kernel version 6.11.5) WIFI was not working properly
>
> By "not working properly" I mean: 
> downloading small files or installing a few small packages was working
> ok, but when downloading larger files or installing larger packages
> with lots of dependencies, the connection would gradually slow down
> and eventually die.
>
> I reported this on the Arch Linux forum (https://bbs.archlinux.org/viewtopic.php?pid=2206757)
> and some helpful memeber suggested that this might be the commit that broke things:
> https://github.com/torvalds/linux/commit/02b682d54598f61cbb7dbb14d98ec1801112b878
>
> An Arch Linux packet manager (gromit) helped me debug this issue by building a couple of kernels that I tested.
>
> - https://pkgbuild.com/\~gromit/linux-bisection-kernels/linux-mainline-6.12rc5-1-x86_64.pkg.tar.zst
> - https://pkgbuild.com/\~gromit/linux-bisection-kernels/linux-mainline-6.12rc5-1.1-x86_64.pkg.tar.zst
>
> The first one didn't work, but the second (in which he reverted the commit linked above) did fix my problem.
> So, I guess this commit should be investigated by those in the know.
> Thats why I also added Andrii and Kalle to CC as they are listed in the commit message.
>
> My network controller: Intel corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61)
> Kernel driver in use: iwl4965
>
> This is my first kernel bug report, hope I did everything right :)

Perfect report, thanks.

> I'm ofc willing to help provide more info and debug locally here to help solve this issue.

Andrii, any ideas? Unless we can fix this quickly I think we need to
revert commit 02b682d5459.

#regzbot introduced: 02b682d54598f61cbb7dbb14d98ec1801112b878 ^

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