unable to play video after upgraded to ubuntu 16.04 from 14.04

[Ralf Mardorf]

On Fri, 29 Apr 2016 03:05:21 +0200, Liam Proven wrote:
>sudo apt-get clean

I wouldn't recommend to clean the complete cache, even while my cache
usually is empty, but I have a backup strategy and archive the cache.

On Fri, 29 Apr 2016 06:33:16 +0800, 李白|字一日 wrote:
>root at eric-desktop:~#   LANG=C rm /var/cache/apt/archives/libgbm*
>root at eric-desktop:~#

The important part of the cache was tidied up, so at least in this case
wiping out everything wouldn't gain anything.

On Fri, 29 Apr 2016 06:33:59 +0800, 李白|字一日 wrote:
>/dev/sda2       909G  282G  582G  33% /

So disk space isn't an issue.

A fsck as recommended by Liam is a good idea, a reboot independent of a
fsck doesn't harm either.

JFTR after reinstalling, updating etc. close and reopen the video
player.

Regards,
Ralf