Bug#930232: vlc: No video output in any video

[Ralf Jung <post@ralfj.de>]

Hi,

> Control: tags -1 moreinfo
> Control: severity -1 important
> Control: found -1 3.0.6-1
> 
> On 2019-06-08 23:20:15, Ralf Jung wrote:
>> Package: vlc
>> Version: 3.0.7-1
>> Severity: grave
>> Justification: renders package unusable
>>
>> Dear Maintainer,
>>
>> No matter which video file I try to open with VLC, VLC fails to display any
>> image.  All I get is a flickering VLC icon.  I will attach a "-vv" log for one
>> of the many files that I tried.  The same files all work fine with mpv.
> 
> What type of GPU do you use?

(Sorry, I thought the debug log would have all that stuff.)
This is a dual-GPU system, with an HD Graphics P530 and an NVidia Quadro M2000M.
 The Intel card is the master, the NVidia card is used as an output slave (i.e.,
my HDMI port is actually connected to the NVidia card).

> Do you have the corresponding hardware
> decoding driver installed?
How can I find that out?  I am using the Mesa drivers for both cards, as far as
OpenGL goes.  (The proprietary NVidia drivers don't support being an output slave.)

>> This is with the default video output setting ("Preferences - Video - Output"
>> set to "Automatic").  If I change it to XVideo, things work fine.
> 
> So not grave after all.

Fair enough.  The default settings are broken though.

Kind regards,
Ralf