Bug 90145

Summary:	[NV94] Corruption on very long (vertical) pages in Firefox
Product:	xorg	Reporter:	Adam Williamson <adamw>
Component:	Driver/nouveau	Assignee:	Nouveau Project <nouveau>
Status:	RESOLVED MOVED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Adam Williamson 2015-04-22 20:28:31 UTC

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.

Comment 1 Ilia Mirkin 2015-04-22 21:07:19 UTC

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.)

Comment 2 Adam Williamson 2015-04-22 21:09:19 UTC

I'm afraid I'd have no idea how to do that, sorry :(

Comment 3 Martin Peres 2019-12-04 08:58:16 UTC

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

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