Bug 709870

I should also mention I haven't seen this behaviour in other programs such as nautilus. The behaviour is specific to firefox.

I see this with nVidia GeForce 6150SE nForce 430, using akmod-nvidia from Rpmfusion. Haven't tested with nouveau yet.

Smolt URL: http://www.smolts.org/client/show/pub_bed58531-672c-4452-b3ee-392a3ff73a2d

Thanks for the report. We are sorry that we cannot help you with your problem, but we are not able to support probems realted to binary-only drivers. If you would be able to reproduce this issue using only open source software, please, reopen this bug with the additional information, but in meantime I have no choice than to close this bug as CANTFIX (because we really cannot fix it).

The open source 'nouveau' driver (in package xorg-x11-drv-nouveau) is the recommended alternative for users of Nvidia graphic chips.  It is used by default in Fedora 11 and later if you remove any customizations that explicitly set the video driver.  The older "nv" driver may be needed in some cases.  It is also available in older Fedora releases.  Install the packages xorg-x11-drv-nouveau or xorg-x11-drv-nv and override the X server's default choice if necessary.  See https://fedoraproject.org/wiki/Features/NouveauAsDefault for more information.

If you used a non-packaged version of the driver from the Nvidia website please clean your system from additional libraries and software it installed. For users who are experiencing problems installing, configuring, or using the unsupported 3rd party proprietary "nvidia" video driver, Nvidia provides indirect customer support via an online web based support forum.  Nvidia monitors these web forums for commonly reported problems and passes them on to Nvidia engineers for investigation.  Once they've isolated a particular problem, it is often fixed in a future video driver update.

The NVNews Nvidia Linux driver forum is located at:

	http://www.nvnews.net/vbulletin/forumdisplay.php?s=&forumid=14

Once you have reported this issue in the Nvidia web forums, others who may have experienced the particular problem may be able to assist.  If there is a real bug occuring, Nvidia will be able to determine this, and will likely resolve the issue in a future driver update for the operating system releases that they officially support.

While we does not support the proprietary nvidia driver, users requiring technical support may also find the various X.Org, XFree86, and Red Hat/Fedora mailing lists helpful in finding assistance:

X.Org mailing lists:
	http://www.freedesktop.org/XOrg/XorgMailingLists

XFree86 mailing lists:
	http://www.xfree86.org/sos/lists.html

Red Hat/Fedora mailing lists:
	https://listman.redhat.com/mailman/listinfo

Created attachment 814555 [details]
Tearing example

I can reproduce it using intel driver:
Firefox 24
xorg-x11-drv-intel-2.21.12-1.fc18.x86_64
xorg-x11-server-Xorg-1.13.3-3.fc18.x86_64
kernel-3.10.14-100.fc18.x86_64

hardware: Thinkpad X230 with i7-3520M (HD Graphics 4000)

Dual head with two 1920x1080 screens

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) (prog-if 00 [VGA controller])
	Subsystem: Lenovo Device 21fa
	Flags: bus master, fast devsel, latency 0, IRQ 43
	Memory at f0000000 (64-bit, non-prefetchable) [size=4M]
	Memory at e0000000 (64-bit, prefetchable) [size=256M]
	I/O ports at 5000 [size=64]
	Expansion ROM at <unassigned> [disabled]
	Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [d0] Power Management version 2
	Capabilities: [a4] PCI Advanced Features
	Kernel driver in use: i915

Please try to disable HW acceleration (Edit -> Preferences -> General and the "Browsing" section). Also try to disable smooth scrolling.

No combination of HW acceleration and smooth scrolling has any visible effect (it doesn't make the tearing less or more visible). I did restart FF after setting the options every time.

I can reproduce it on F19:

$ rpm -q firefox xorg-x11-drv-intel xorg-x11-server-Xorg kernel kde-workspace
firefox-25.0-3.fc19.x86_64
xorg-x11-drv-intel-2.21.12-2.fc19.x86_64
xorg-x11-server-Xorg-1.14.3-2.fc19.x86_64
kernel-3.11.6-200.fc19.x86_64
kde-workspace-4.11.2-1.fc19.x86_64

I've tried composed desktop both with XRender and OpenGL with forced VSync.

This issue is still present in Fedora 20 release.

I can confirm it with nVidia GTS450 and Nouveau on Fedora 20, when running off LiveCD.

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This issue is still present in Fedora 21 release.

This issue is present in Fedora 22 and KDE 5.

This message is a reminder that Fedora 21 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 21. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as EOL if it remains open with a Fedora  'version'
of '21'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version.

Thank you for reporting this issue and we are sorry that we were not 
able to fix it before Fedora 21 is end of life. If you would still like 
to see this bug fixed and are able to reproduce it against a later version 
of Fedora, you are encouraged  change the 'version' to a later Fedora 
version prior this bug is closed as described in the policy above.

Although we aim to fix as many bugs as possible during every release's 
lifetime, sometimes those efforts are overtaken by events. Often a 
more recent Fedora release includes newer upstream software that fixes 
bugs or makes them obsolete.

Please see comment 12

I can't reproduce it with Fedora 22 using:
firefox-41.0.2-2.fc22.x86_64
xorg-x11-drv-intel-2.99.917-15.20150729.fc22.x86_64
xorg-x11-server-Xorg-1.17.2-2.fc22.2.x86_64
kernel-4.2.3-200.fc22.x86_64
plasma-workspace-5.4.2-4.fc22.x86_64

The rendering backend used is OpenGL 2.0, with GLX OpenGL interface
Vsync is set to automatic.
Firefox is not set to do smooth scrolling, but is set to use hardware acceleration.

I'm using the same hardware as I mentioned in Comment #4

Fedora 21 changed to end-of-life (EOL) status on 2015-12-01. Fedora 21 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this
bug.

Thank you for reporting this bug and we are sorry it could not be fixed.