I know this isn't strictly a mythbuntu problem but I'm posting here anyways as the machine in question is running mythbuntu and I figure this forum has people knowledgeable about video. If people think this thread would be better served in a different forum please feel free to suggest.
Machine in question is a new-ish install using 10.10 on this hardware:
Foxconn M61PMP-K AM3 NVIDIA MCP61P Micro ATX AMD Motherboard
AMD Athlon II X2 240 Regor 2.8GHz Socket AM3 65W Dual-Core Processor ADX240OCGQBOX
Patriot 2GB 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Desktop Memory Model PSD32G13332
HITACHI Deskstar 7K1000.C HDS721010CLA332 (0F10383) 1TB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
The PC is connected to a TV via the VGA port on the motherboard.
Mythbuntu itself performs fine. However, when watching web content in firefox or chromium in a web browser (i.e. watching TV show episodes on pbs.org or hulu.com) there are some weird performance issues.
If I watch the content in a "normal" browser window things are totally fine. However, if I use the player's "full screen" mode it all goes to crap. The video playback starts dropping frames to the point that it's not watchable; it probably drops to only 1 or 2 fps. The strange thing is, I can zoom or expand the "normal" browser window until the media nearly fills the screen and performance is totally fine. The problem only occurs when using the "full screen" button presented in the player.
Any thoughts? Is there something I can adjust in software? Is this a case of the poor quality video card on the mobo causing issues? If so, can someone suggest a cheap and compatible video card?