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I have searched and search for help on this issue for about a week and a half, and convinced that I seem to be unable to find a concise solution to the problem, I now implore the wisdom of this site for help.
I have mythbuntu running on a rig setup with an AMD "APU" A10-5800K, XBMC running on top of it. My goal is to get audio and video out of the HDMI port with as smooth playback of live tv as possible.
Default drivers actually worked pretty well, as far as I could tell, although because I could find no way to get audio flowing through HDMI, I had to move on.
fglrx from the repository was a disaster. I barely even still had video.
fglrx-legacy from Tomasz Makarewicz worked pretty well, as far as I could tell, but in order to remove a pesky "Unsupported Hardware" logo from the bottom-right of the screen, I had to replace a particular file (control) from a more recent version of the proprietary driver.... and.... for whatever reason, it appeared to affect fairly negatively the picture.
So, downloaded the newest proprietary driver from AMD, which I really should have done from the start. I do have HDMI (analog) audio piping through HDMI, and I do have video, but here are the problems.
Using XBMC, I am finding the ability to use digital audio next to impossible. It appears using HDMI with digital audio, when something is playing, syncing up the audio to the video completely prevents the computer's ability to play any kind of video smoothly.
But, I can live with analog audio. That is not the game-changer.
What I am starting to be driven mad by is the screen tearing. I am noticing it only with live TV, and not really with movies played from local files. This makes me think it's a deinterlacing issue, and if it is, I may have to ask folks on a XBMC/MythTv forum, since I can't, for the life of me, anywhere in XBMC or Myth, find options I can fiddle with that I haven't already tried in solving this problem. The only option that appears to affect this effect is the Screen Tearing panel in Catalyst Control Center - which I have now set to max. (Anything less, and it gets pretty terrible.)
If anyone has any idea what I should be doing, I defer completely to your wisdom.
If your search has been fruitless, try including sitehoronix.com in the search.
Then get a concise description of errors, salient lines from logs, and post on the phoronix forums where developers _do_ hang out from ATI. Figure out your fps before tearing occurs if you can. I would also try with something else like mplayer or vlcplayer and see how that goes.
I have a A8-5500 and currently i use the 13.4 driver (on Debian testing 64-bit).
I get screen tearing issues with xv output in any player. Setting it to opengl solved this issue.
I use xbmc also, but i have compiled the FernetMenta's branch that uses native xvba decoding. It seems to work ok if i enable vsync in the driver and disable "adjust display refresh rate to match video" and "sync playback to display" and i set the display method to "advanced shaders(GLSL)".
But i only have a monitor with vga connector.
The "tear free option" introduces triple buffering and indeed helps with vsync (really helpful with flash btw), but it does use more video memory and, according to the people over the xbmc forums, its "pure evil" for some reasons (that i didnt fully understand) that have to do with the rendering method of xbmc and the 12.10+ fglrx drivers inability to vsync correctly in certain cases.
BTW vsync works just fine with any opengl application i tried.