[mythtv-users] mythTV, Kaffeine and Twinhan DVB-T

[Dave]

I don't know if this is any help, I have two DVB-T Cards in my Myth backend, 
being fed off the same aerial in the loft, via a splitter.

1. Avermedia DVB-T - this has a 99% Signal Strength
2. Twinhan DVB-T - this, even with a signal booster, only manages to get 33% 
Signal Strength. I very often get signal breakups on this card when watching 
live tv on the (seperate) frontend. The signal breakups do not seem to be 
quite so bad when watching recorded programs from this card.

I have been tempted to replace the card with another Avermedia.

Regards,
Dave.

On Wednesday 15 March 2006 10:39, Nicklas Bergfeldt wrote:
> Nick Crabtree wrote:
> > To see whether buffering is the issue, you could try activating laptop
> > mode, which groups disk write activity into "chunks" that are spaced
> > at larger intervals than they normally would be. Although this is
> > intended as a power saving idea to let a laptop's hard drive spin
> > down, it would in this case check whether the 30second interval jumps
> > are due to disk cache flushes. emerge laptop-mode-tools to install it,
> > and run /usr/sbin/laptop_mode start to start it.
>
> I tried that and it did not have any effect :-(
>
> > Of course, if you are running other stuff and don't have the free RAM
> > for more than 30 seconds of TV then you will still get disk activity
> > and laptop mode won't help.  But on a quiet system (no web browser or
> > email client running, for example) then you should have plenty of
> > spare RAM for this.
>
> That should not be any problem since this computer is solely used for
> mythTV...
>
> > You might also want to try benchmarking using interbench
> > members.optusnet.com.au/ckolivas/
> > <http://members.optusnet.com.au/ckolivas/>*interbench*/
>
> Would this indicate that I need faster hardware, or is it enough for
> mythTV?
>
> Sky /usr/src/interbench/interbench-0.30 > make
> gcc -W -Wall -g -O2 -s -pipe   -c -o interbench.o interbench.c
> interbench.c:1404:18: warning: unknown escape sequence '\]'
> gcc -W -Wall -g -O2 -s -pipe   -c -o hackbench.o hackbench.c
> gcc -lrt -lm  interbench.o hackbench.o   -o interbench
> Sky /usr/src/interbench/interbench-0.30 > ./interbench
> loops_per_ms unknown; benchmarking...
> 514666 loops_per_ms saved to file interbench.loops_per_ms
> Creating file for read load...
>
> Using 514666 loops per ms, running every load for 30 seconds
> Benchmarking kernel 2.6.15-gentoo-r1 at datestamp 200603151111
>
> --- Benchmarking simulated cpu of Audio in the presence of simulated ---
> Load    Latency +/- SD (ms)  Max Latency   % Desired CPU  % Deadlines Met
> None      0.007 +/- 0.0153     0.218             100            100
> Video     0.153 +/- 0.264      0.517             100            100
> X          1.42 +/- 3.15          12             100            100
> Burn      0.005 +/- 0.00633    0.016             100            100
> Write     0.033 +/- 0.178       4.02             100            100
> Read      0.024 +/- 0.025      0.071             100            100
> Compile   0.053 +/- 0.364          8             100            100
> Memload   0.128 +/- 0.705       8.01             100            100
>
> --- Benchmarking simulated cpu of Video in the presence of simulated ---
> Load    Latency +/- SD (ms)  Max Latency   % Desired CPU  % Deadlines Met
> None      0.005 +/- 0.00574    0.023             100            100
> X          4.15 +/- 9.3         33.3            99.1           83.4
> Burn      0.006 +/- 0.0123     0.127             100            100
> Write     0.028 +/- 0.186       5.75             100            100
> Read      0.023 +/- 0.0281      0.22             100            100
> Compile   0.036 +/- 0.491       20.7             100           99.9
> Memload   0.091 +/- 0.87        24.7             100           99.8
>
> --- Benchmarking simulated cpu of X in the presence of simulated ---
> Load    Latency +/- SD (ms)  Max Latency   % Desired CPU  % Deadlines Met
> None          0 +/- 0.00283    0.032             100            100
> Video     0.003 +/- 0.0386     0.476             100            100
> Burn          0 +/- 0.000872   0.012             100            100
> Write     0.214 +/- 1.21          10            93.8             92
> Read      0.036 +/- 0.42           6            99.3           98.7
> Compile   0.202 +/- 1.04           8            96.2           93.3
> Memload   0.149 +/- 0.983         10            92.1           90.7
>
> --- Benchmarking simulated cpu of Gaming in the presence of simulated ---
> Load    Latency +/- SD (ms)  Max Latency   % Desired CPU
> None      0.001 +/- 0.0216     0.354             100
> Video     0.008 +/- 0.157       2.94             100
> X          12.9 +/- 31.3         208            88.6
> Burn        195 +/- 269          367            33.9
> Write      33.7 +/- 99.2         818            74.8
> Read       6.27 +/- 6.71        10.3            94.1
> Compile     326 +/- 395          570            23.5
> Memload    15.7 +/- 33.7         191            86.4
>
>
> Sky /usr/src/interbench/interbench-0.30 >
>
>
> /Nicklas
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