Re: Linux 7.1-rc2

[Luna Jernberg]

https://gitlab.freedesktop.org/drm/i915/kernel/-/work_items/16015

Den mån 4 maj 2026 kl 13:00 skrev Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>:
>
> On Mon, 04 May 2026, Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
> > On Mon, May 04, 2026 at 06:52:02AM +0200, Luna Jernberg wrote:
> >> Hey!
> >>
> >> Having the same backlight problem as in rc1
> >
> > I think you can try to find a time and bisect [1] to the problematic commit.
> > Note, using `ccache` (your distro should have that) may speed up a lot the
> > build process, hence drastically decrease the time needed to find the culprit.
> > Taking into account the amount of changes in the kernel it usually takes less
> > than 14 steps (basically amount of how many times you need to build a kernel).
>
> The bisect is likely the quickest way to root cause this.
>
> But if that's too much to ask, please file a bug as described at [1],
> with the full dmesg attached, with the proper drm.debugs enabled.
>
> I've seen [2] but it's not the full dmesg, and it doesn't have the
> appropriate drm.debugs enabled (it's a bit mask).
>
> The replies to Linus' -rc mails give an air of urgency, but there's just
> not enough actionable information here. There's not going to be a fix in
> -rc3 either if we don't know what the problem is!
>
>
> BR,
> Jani.
>
>
> [1] https://drm.pages.freedesktop.org/intel-docs/how-to-file-i915-bugs.html
> [2] https://lore.kernel.org/r/CADo9pHiFE6fX_XxYWL+0UEqDLsXQYGzfvnFF5NK_NWbvMsz25Q@xxxxxxxxxxxxxx
>
> >
> >> Den sön 3 maj 2026 kl 23:41 skrev Linus Torvalds
> >> <torvalds@xxxxxxxxxxxxxxxxxxxx>:
> >> >
> >> > I bring you tidings of another regular rc release - 7.1-rc2 is out,
> >> > and looks fairly normal.
> >> >
> >> > Now, the raw diffstat doesn't _look_ normal, with half of the diff
> >> > being to the kvm selftests, but that's pretty much entirely due to
> >> > just renaming in the selftests to have the same naming conventions as
> >> > the kernel code has (wrt both variable and type names), so it all
> >> > looks big and strange, but you should just ignore that oddity.
> >> >
> >> > And when that part is masked out, the rest looks very normal - about
> >> > half various driver fixes (gpu and networking dominating as usual),
> >> > with the rest being spread all over the place.
> >> >
> >> > It's not small, and while it's a bit early to say for sure, I do
> >> > suspect we're seeing the same continued pattern of more patches than
> >> > usual - probably due to AI tooling - that we saw in 7.0.
> >> >
> >> > Let's keep testing,
> >
> > [1]:
> > https://docs.kernel.org/admin-guide/bug-bisect.html
> > https://wiki.ubuntu.com/Kernel/KernelBisection
> > https://wiki.gentoo.org/wiki/Kernel_git-bisect
>
> --
> Jani Nikula, Intel