Here is what I tried:
- victorhqc's suggestion from above
- http://www.ubuntuvibes.com/2011/10/how-to-fix-lag-issues-with-ati.html
To fix the lack of audio with HDMI - No sound on HDMI with Radeon driver
Just in case anyone else still has some video glitching after exhausting all other options. This fixed the problem for me.
Hardware: ATI Radeon HD 4250OS: Ubuntu 12.04(32bit)
From VideoLAN Forum:
Re: Playback Slow/Choppy in Ubuntu 9.04?
by OttifantSir » Tue Aug 18, 2009 9:09 am
I just found this out myself. A "revelation" you might say. I use a Radeon 3450 HD myself, streaming video over Gigabit LAN on a 2.4GHz 2GB RAM media-PC. I suddenly realised, out of the blue, that VLC is set to default video output, meaning X11/XVideo, but the card is capable of using OpenGL. So, I changed the output to OpenGL, saved the Preferences, restarted just to be sure that was the output used. Besides bad coding, skipped frames in the original recording, not the machine skipping frames, the video output has been stable, fluid and without artifacts. Just a tip to try if you have the possibility.