[mythtv-users] Workaround: MythMusic: Selection/scrolling of music is slow - X uses 99% CPU???

Peter Valdemar Mørch swp5jhu02 at sneakemail.com
Mon Mar 7 07:54:16 UTC 2005

Peter Valdemar Mørch swp5jhu02-at-sneakemail.com |Lists| wrote:
> Anybody know why it should take 99% CPU to move around the MythMusic 
> playlist editor? Even better: Anybody know of a fix/workaround?

Well, this patch works. When navigating around the music list, the 
bottom part of the screen ususally gets updated with the title, artist, 
lenght etc. Disabling that with the patch below moves the CPU usage from 
99% to around 2% when navigating the playlist editor and makes the UI 
nice and responsive.

So something funky is up with DatabaseBox::entered(). I'm not sure, but 
it calls m_lines.at(XX)->SetText() a number of times, and these calls 
may be causing the high CPU utilization. But I've never written a line 
of X gui code, so I really don't know whats going on... But maybe I 
should take that up with the devel list... :-D

But here is a workaround for others who have the same problem...


--- mythmusic-0.17/mythmusic/databasebox.cpp.orig       2005-02-06 
19:27:45.000000000 +0100
+++ mythmusic-0.17/mythmusic/databasebox.cpp    2005-03-07 
00:29:42.000000000 +0100
@@ -599,6 +599,9 @@

  void DatabaseBox::entered(UIListTreeType *treetype, UIListGenericTree 
+    cerr << "DatabaseBox::entered\n";
+    return;
      if (!item || !treetype)

Peter Valdemar Mørch

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