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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>My system config is very similar (Athlon 2200+, Nvidia
5200FX, 512MB, FC5, gnome), and I have been struggling with this same issue for
some time. Here is some CPU usage data I collected to illustrate:</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Source
%frontend %Xorg %Idle</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>-----------
------------- -------- -------</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>480 SD
10
0.5 85</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>720p
HD
40
59 1</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>1080i
HD
35
0.5 62</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Note the high % CPU usage for Xorg when running
720p. I have tried a lot of experiments to try and isolate, but without
much luck.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Try 1) I am using the 8178 nvidia driver currently,
but tried both older and more recent versions. Same result.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Try 2) Adjusted all settings available in nvidia-settings
configuration tool, …nothing made a difference</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Try 3) I’m using xrandr to set display size to exactly
match source on play back. Above numbers were taken this way. If I
don’t do this, the Xorg %CPU usage goes up dramatically for all
cases. I presume this is due to overhead required to scale the
output. …so reverse logic would make me think maybe 720p is getting
scaled some how despite the fact I am displaying it on 720x1280.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Try 4) Tried KDE instead of GNOME, same. Also
tried running X with a simple window manager, like tvm. Although
initially this appeared to fix the problem, it did not.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Try 5 ) 720x1280 is what I run my mythtv menus at. Hmm...,
coincidence maybe? …so changed my default gnome desktop size and
mythtv menus to 480x720. Made no difference.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Initially had this setup running with a Athlon 1100 and had
same issue. This is what prompted me to swap in a faster processor,
but it made no difference. </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Any ideas?</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
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