[mythtv-users] Re: HDTV sound okay, but no video

Sammo sammo2828 at gmail.com
Fri Jul 15 18:31:00 EDT 2005

Okay, I just realised it may have something to do with DRI or Direct
Rendering. The description of the problem in my previous email happens
when DRI is enabled, Option "no_dri" "no".

When DRI is disabled, "no_dri" "yes", SD channels are also fine,
except XFree86 uses around 15%cpu (compared to 2.5%cpu with DRI). For
HD channels, the video can be seen, although it's very jumpy, probably
because XFree86 also takes up a lot of %cpu (close to 99%). Audio is
jumpy as well. Seems that disabling DRI gives images on the screen,
but makes the computer too slow to decode all the frames and audio.

So, it appears that it may have something to do with DRI, and at this
point I don't know enough about how mythtv works to do any more

Please, if anyone has any suggestions on what I could look for, I
would be very happy!

On 7/15/05, Sammo <sammo2828 at gmail.com> wrote:
> Athlon XP 2500+, ATI Radeon 9550, Twinhan Visionplus DVB-T
> Linux
> XFree86 4.3
> ATI fglrx-4-3-0_8.14.13-2_i386 driver with fglrx kernel module
> compiled and installed
> Mythtv 18.1 compiled for athlon-xp
> SD channels work fine, with around 18%cpu for mythfrontend and 2.5%cpu
> for XFree86
> HD channels have perfect audio, but NO VIDEO!! 48%cpu for mythfrontend
> and 0.5%cpu for XFree86. If I change from a SD channel to a HD
> channel, the last frame of the SD channel remains on the screen. When
> I change back to a SD channel from a HD channel, the SD channel is
> fine again.
> Tried turning off de-interlacing, and tried using libmpeg2 for
> decoding, but same problem.
> Any ideas appreciated.
> Thanks ...

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