These are my specs;

Asus G75VW - 17" 1920x1080
i7-3610QM
Slackware 14.1 x86_64
libvdpau-0.7
Openbox 3.5.2
nvidiabl-0.87
xorg-server-1.14.3
GTX660M - (331.67 drivers)

I've come across two issues related to vdpau, or least to some it appears that way or possibly an issue with the driver(s)...

1. When using nvidiabl which can be found here; https://github.com/guillaum when the screen brightness has been turned down and then you either view a flash video like youtube online through Firefox, or watch a video in myplayer with vdpau enabled the screen brightness defaults back to maximum brightness, turns automatically all the way up.

Here is a bug report on this issue the developer claims this is with vdpau;

https://github.com/guillaumezin/nvidiabl/issues/92

2. When using the mpv media player you can find here; http://mpv.io/ and using vo=vdpau, when coming out of fullscreen the video player locks up.

Here's a bug report on this the developer claims is a driver issue;

https://github.com/mpv-player/mpv/issues/725

I contacted Aaron Plattner who mentioned that my backlight problem is more likely to be a system-level problem, or a problem with the graphics driver, and he suggested running nvidia-bug-report.sh to generate a bug report log file, and then send this to Nvidia, which I've done.

So to be honest I don't know if this is a problem from just vdpau, or there are driver issues from Nvidia, but I certainly need someone taking a look at this because it's really becoming a problem I'm constantly running into, and I see a lot of people also online running into the same types of issues for the past year...

I really don't know what files, logs, reports, etc., anyone needs so please let me know if you need anything.

I truly hope this is something that can finally get resolved...

THANK YOU!