I'm currently experiencing some jerky playback when watching QAM HDTV on my AirStar HD5000 with Athlon 64 3200+ system.

When I change channels, the "guide" is superimposed for a few seconds. During this time the playback skips about every other frame (it seems like).

The system is an Asus Pundit P1-AH1, AMD Athlon 64 3200+, 512MB RAM (my other 512MB RAM stick is bad), Seagate Barracuda SATA drive (16 MB Cache).

Is this normal to see?

I'm outputting via the regular VGA connection for now (watching on my little LCD monitor until I get the entire system working right, then I plan to switch to DVI for my 42" Plasma).

I believe it's an Nvidia Geforce 6150 video card on the Pundit (at least I think that's what linux found it as). Shared RAM, though.

Oh, MythTV R5E50 build.

(do I need to download and install Xvmc?)

This thread should interest you http://mysettopbox.tv/phpBB2/viewtopic.php?t=13441

Thanks for the info.

I should clarify that this only happens when the "overlay" of the "guide" is on the screen. Once it fades away, everything is fine.

Top shows that mythfrontend is at about 40% CPU during "live tv".

With the "overlay" on the screen, it's about 90% CPU for mythfrontend.

This is with the xvmc enabled. (or so I think. The wiki didn't state whether a reboot was needed after "enabling" it).

Do I dare upgrade the nvidia drivers (shudder)?

This is not a new problem. I have the same in R5D1 (doesn't bother me enough to do anything about it, though).


Obviously, that would be entirely up to you

I have a simular setup to yours and noticed this problem too. To me it seemed worse with certain OSDs themes and certain channels. Have you tried changing OSD themes? I seem to have success using Titivillus-OSD in R5D1.

I will try that.

I will say I don't think it's the x.org as I MAYBE see it at 1% during the jerkiness.

(Yes, I'm a linux noooob and total noooob to mythtv).

So if I ask something stupid, please bear with me.

It appears the the default for R5E50 is already at the titilius theme