[Bug 90145] New: [NV94] Corruption on very long (vertical) pages in Firefox

[Bug 90145] New: [NV94] Corruption on very long (vertical) pages in Firefox

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https://bugs.freedesktop.org/show_bug.cgi?id=90145

            Bug ID: 90145
           Summary: [NV94] Corruption on very long (vertical) pages in
                    Firefox
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: adamw-cfjF3rc+CpsYNetmKr+vY16hYfS7NtTn@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

Bug seen in current Fedora 22 - kernel 4.0.0-1.fc22.x86_64 ,
xorg-x11-drv-nouveau-1.0.11-2.fc22.x86_64 ,
xorg-x11-server-common-1.17.1-9.fc22.x86_64 ,
mesa-dri-drivers-10.5.1-1.20150314.fc22.x86_64 , libdrm-2.4.59-4.fc22.x86_64 .

If I view a page with a lot of vertical scroll in Firefox - say, a long
article, or just a page with a lot of Disqus comments - after I scroll through
quite a long way, the display of the page starts corrupting.

http://www.avclub.com/article/surely-you-cant-be-serious-oral-history-airplane-218043
is a good example: it starts corrupting around the "Into The Cockpit" section.

I can scroll up to any point above the 'corruption cut off' and it will display
just fine...but if I scroll down below it, no matter how I do it (mouse wheel,
scrollbar, keys, whatever), the rendering is corrupted.

https://www.happyassassin.net/temp/nouveau_scroll_corrupt.webm is a video
demonstrating the corruption.

The video adapter is a 01:00.0 VGA compatible controller [0300]: NVIDIA
Corporation G94 [GeForce 9600 GT] [10de:0622] (rev a1) ; Ben Skeggs has one of
the same model.

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[Bug 90145] [NV94] Corruption on very long (vertical) pages in Firefox

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https://bugs.freedesktop.org/show_bug.cgi?id=90145

--- Comment #1 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Probably an issue with an X pixmap that is larger than the largest allowable
texture size. X pixmaps go up to 32Kx32K, while nv50-family goes up to 4K (and
nvc0 goes up to 8K).

If you're proficient with X tools, can you double-check that that's the case.
(Not sure how you'd do it... xwininfo gives you info on windows, not pixmaps...
you could look at an xtrace of it I suppose.)

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[Bug 90145] [NV94] Corruption on very long (vertical) pages in Firefox

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https://bugs.freedesktop.org/show_bug.cgi?id=90145

--- Comment #2 from Adam Williamson <adamw-cfjF3rc+CpsYNetmKr+vY16hYfS7NtTn@public.gmane.org> ---
I'm afraid I'd have no idea how to do that, sorry :(

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[Bug 90145] [NV94] Corruption on very long (vertical) pages in Firefox

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https://bugs.freedesktop.org/show_bug.cgi?id=90145

Martin Peres <martin.peres-GANU6spQydw@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |MOVED

--- Comment #3 from Martin Peres <martin.peres-GANU6spQydw@public.gmane.org> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance:
https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/183.

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