All --

To follow-up on several helpful hints I received in my previous post http://www.linuxquestions.org/questi...rs-4175586428/ without going off-topic on the [SOLVED] thread.

Toutatis told me here ( http://www.linuxquestions.org/questi...8/#post5587287 ) that NVidia 367.35 was available ( I was running 367.27 but decided to defer the Nvidia update until after solving the Chromium Issue ).

I applied the Aug 6 Slackware64 ( and Multilib ) Updates for 14.2 and then updated the Nvidia Blob to 367.35 without any apparent ill side-effects ( no black screen and no screen tearing ).

I know about the Black Screen Bug, but I had no idea 'what is screen tearing' because I've never seen it before.

If anyone needs to know, this was a handy Google Search Result https://www.google.com/search?q=what...13.O_12kwTB00U

In addition to solving my original issue, SeB also posted a handy script to toggle ForceFullCompositionPipeline in nvidia-settings here http://www.linuxquestions.org/questi...8/#post5587338.

I saved the script in my $PATH and tried it out ... didn't seem to change anything good-or-bad but it's there in case I ever need it.

basmadrigal sent a hint about the NVidia Blob possibly messing up vdpau but as far as I can tell, all the files in /var/log/packages/libvdpau-1.1.1-x86_64-1 are intact and match the files in Johnson's original Slackware64 14.2 Package.

Finally, I've always been able to play youtube videos online via firefox / chromium perfectly but when I downloaded and installed Alien's Restricted VLC Package I was unable to play downloaded youtube videos via VLC without nasty pixellation.

I found a work-around here: https://forum.videolan.org/viewtopic.php?t=132705

In the VLC Settings: [Tools]->[Preferences]->[Input Codecs], set [Hardware-accelerated-decoding] = [Disabled] ; restart VLC and the test videos I downloaded via youtube-dl ( nice ! https://slackbuilds.org/repository/1...rk/youtube-dl/ ) all worked perfectly with that VLC config.

I am sure this means something is still 'off' on my Laptop but I don't have a DVD/BluRay Device so I don't play movies much except from a browser and I likely won't chase this any further for now.

As we say down here in TX, Thanks All Y'All !

-- kjh

Marked this thread [SOLVED] and posting a 'reply-to-self' so that this thread does not appear every morning in your 'unread Threads'

-- kjh

Hello,

AFAIK, tearings can be encountered with nvidia videocards using chipsets GTX6xx/7xx(Kepler) and 9xx(Maxwell).

Most of the time ForceFullCompositionPipeline=on can fix that, but in some case that does not work.

To check if you have tearings when ForceFullCompositionPipeline=off, try this video, then retry it with ForceFullCompositionPipeline=on. The tearings can also be seen when scrolling fast, with mouse wheel for instance.

--
SeB

1 members found this post helpful.

thanks SeB for that script. Here, after removing the metamode definition from my /etc/X11/xorg.conf.d/10-nvidia.conf, I had solved in a different way using nvidia-settings in my ~/.xinitrc: just before launching the DE I executed

1 members found this post helpful.

Thanks SeB for the sample video to demonstrate screen tearing.

Thanks even more for the Script to toggle ForceFullCompositionPipeline.

Turns out I must have had screen tearing because when I enabled ForceFullCompositionPipeline via your script, the image quality definitely improved.

I've never noticed any issues scrolling but then again my old eyeballs just aren't what they once were

-- kjh