[BUG][REGRESSION] mangled display since -rc1

[Martin Kepplinger]

so guys,

I can't believe that nobody hits this: Since -rc1 Nautilus' list of 
elements or Firefox' website window or just photos in eog (probably 
among many more things) is mangled. Please have a look at the screenshot 
of nautilus.

This is the same on a i3 laptop with intel graphics and a i7 with nouvau 
graphics. I bisected and the problem is this merge:
first bad commit: [56e520c7a0a490b63b042b047ec9659fc08762a4] Merge tag 
'iommu-updates-v4.9' of 
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Two things I'd ask of you if this isn't already a known problem to you:

* I failed bisecting into this merge but I could easily have tried it 
totally wrong, so I'd appreciate any advice on how to bisect into this.
  Strangely, running joro's 
https://git.kernel.org/cgit/linux/kernel/git/joro/iommu.git/commit/?h=iommu-updates-v4.9&id=13a08259187c5cd3f63d98efa159ab42976d85a4 
(referenced here: 
https://git.kernel.org/cgit/linux/kernel/git/joro/iommu.git/tag/?h=iommu-updates-v4.9) 
is good (?)

* Please add anybody you know is involved to CC.

I'm happy to test patches too, of course.

Anyhow. This is a bad regression that prevents me from running 4.9. Just 
so you know.

so long,
                                martin

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