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Ubuntu 14.04 (trusty) reached end-of-standard-support on April 25, 2019.
I'm setting the status of this bug to 'Incomplete' as it's not seen any
activity for some time. If this issue is still relevant when using a
currently maintained release of Ubuntu then please let us know which
one(s) otherwise this bug report can be left to expire in approximately
60 days time.
** Changed in: xorg-server (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1374976
Title:
Screen tearing Nvidia - since Kubuntu 14.04
Status in xorg-server package in Ubuntu:
Incomplete
Bug description:
Affects fullscreen YouTube, VLC or OnLive.
Since Kubuntu 14.04 I have a screen tearing which is quite annoying...
It looks like 4/5 of the screen gets painted on time and the rest is
refreshed too late.
The problem occurs since Kubuntu 14.04. Changing Nvidia drivers does
not help. Currently I'm on the recommended 331.89 driver.
No problem on Debian and previous versions of Kubuntu.
Temporary resolution is:
1) Go to System Settings -> Desktop Effects
2) Go to Advanced tab
3) Change the Scaling Method to whichever other option
4) Apply settings
The problem reoccurs after restart or resume from suspend or
hybernation.
---------------------------------------------------------------------
The following FIXED the problem completely:
---------------------------------------------------------------------
Create file:
/etc/profile.d/Tearing.sh
Insert this code:
export __GL_YIELD="USLEEP"
Then make it executable with:
chmod +x /etc/profile.d/Tearing.sh
Once that's done, reboot.
The GL_YIELD worked for me, and now vertical sync appears to be
working as it should.
(https://www.kubuntuforums.net/showthread.php?63946-No-vertical-sync-
with-NVIDIA&highlight=tearing)
---------------
Output of "sudo lshw -C display; lsb_release -a; uname -a; free -m" as
follows:
*-display
description: VGA compatible controller
product: G96 [GeForce 9500 GT]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nvidia latency=0
resources: irq:50 memory:e2000000-e2ffffff memory:c0000000-cfffffff
memory:e0000000-e1ffffff ioport:2000(size=128)
*-display
description: Display controller
product: 82G33/G31 Express Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: msi pm bus_master cap_list
configuration: driver=i915 latency=0
resources: irq:47 memory:e3200000-e327ffff ioport:3460(size=8)
memory:d0000000-dfffffff memory:e3100000-e31fffff
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu Utopic Unicorn (development branch)
Release: 14.10
Codename: utopic
Linux CNRI-PC 3.16.0-18-generic #25-Ubuntu SMP Fri Sep 26 02:44:15 UTC 2014
x86_64 x86_64 x86_64 GNU/Linux
total used free shared buffers cached
Mem: 7909 4353 3555 94 529 1306
-/+ buffers/cache: 2518 5391
Swap: 10001 0 10001
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: xserver-xorg-core 2:1.16.0-1ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-18.25-generic 3.16.3
Uname: Linux 3.16.0-18-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.7-0ubuntu2
Architecture: amd64
Date: Sun Sep 28 15:32:03 2014
ExecutablePath: /usr/bin/Xorg
InstallationDate: Installed on 2014-09-13 (14 days ago)
InstallationMedia: Kubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140826.1)
ProcEnviron:
SourcePackage: xorg-server
UpgradeStatus: No upgrade log present (probably fresh install)
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