Video scrolling is choppy, stutters. 340, 390, 435, 440 drivers tested.

[Ken Wagner]

Choppy video is also present in games: Kpatience, Mahjongg, etc.

In Ubuntu 16.04 on same computer all is smoothe and fast.

My desktop with AMD ASUS mb and GeForce 720 nvidia card:

Very choppy video, no smoothe scrolling. Drivers 440, 435, 340, 390 make no difference.

If you'd like me to test, just email me.

Thanks,

Ken Wagner

Ubuntu:

Linux ken-desktop 4.15.0-96-generic #97~16.04.1-Ubuntu SMP Wed Apr 1 03:03:31 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

FireFox 75.0 Expected smooth scrolling as in Ubuntu 16.04.

Actual result: very choppy video almost everywhere (not just in FireFox).

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: firefox 75.0+build3-0ubuntu0.16.04.1
ProcVersionSignature: Ubuntu 4.15.0-96.97~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-96-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
AddonCompatCheckDisabled: False
ApportVersion: 2.20.1-0ubuntu2.23
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: ken 3662 F.... pulseaudio
 /dev/snd/controlC2: ken 3662 F.... pulseaudio
 /dev/snd/pcmC0D0p: ken 3662 F...m pulseaudio
 /dev/snd/controlC0: ken 3662 F.... pulseaudio
BuildID: 20200403170909
Channel: Unavailable
CurrentDesktop: Unity
Date: Sat May 2 11:03:15 2020
DefaultProfileExtensions: extensions.sqlite corrupt or missing
DefaultProfileIncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
DefaultProfileLocales: extensions.sqlite corrupt or missing
DefaultProfilePrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:736
DefaultProfilePrefSources: prefs.js
DefaultProfileThemes: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2018-03-28 (766 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
IpRoute:
 default via 192.168.2.1 dev wlxe84e061f8243 proto static metric 600
 169.254.0.0/16 dev wlxe84e061f8243 scope link metric 1000
 192.168.2.0/24 dev wlxe84e061f8243 proto kernel scope link src 192.168.2.3 metric 600
MostRecentCrashID: bp-9e42fe63-a37b-4607-a09b-8dfdc0200418
Profile1Extensions: extensions.sqlite corrupt or missing
Profile1IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
Profile1Locales: extensions.sqlite corrupt or missing
Profile1Plugins: Shockwave Flash - /usr/lib/adobe-flashplugin/libflashplayer.so (adobe-flashplugin)
Profile1PrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:736
Profile1PrefSources: prefs.js
Profile1Themes: extensions.sqlite corrupt or missing
Profiles:
 Profile1 - LastVersion=69.0/20190827005903 (Out of date)
 Profile0 (Default) - LastVersion=75.0/20200403170909 (In use)
RelatedPackageVersions: adobe-flashplugin 1:20200414.1-0ubuntu0.16.04.1
RunningIncompatibleAddons: False
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/09/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2501
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: M5A97 LE R2.0
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2501:bd04/09/2014:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnM5A97LER2.0:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: To be filled by O.E.M.

[Ken Wagner (beaucoder)]

Solution Found!!

After many, many hours installing & reinstalling Ubuntu 20.04 and customizing my setup.

Serendipity struck!!

I quit the "System Load Indicator" installed via the Snap Store and ***VOILA!!*** stuttering all gone.

Yet this same app works just fine in 16.04 & 18.04.

Is there a fix other than not using it? I run it all the time to monitor CPU, memory & internet usage.

Thanks,

Ken Wagner

[Ken Wagner (beaucoder)]

System Load Indicator or by its apt name 'indicator-multiload'

...should be either fixed, show a 20.04 warning or be dropped.

Thanks,

Ken Wagner
P.S. If you'd like me to test, let me know.