[mythtv-users] When Watch TV...

[Amyg]

When I watch TV ,I get black screen. 
And my terminal shows below: 

2005-08-31 15:39:15.195 Using protocol version 15 
2005-08-31 15:39:15.405 Using protocol version 15 
2005-08-31 15:39:15.617 Using protocol version 15 
2005-08-31 15:39:15.753 Using protocol version 15 
2005-08-31 15:39:16.451 RemoteFile::Read() failed in 
RingBuffer::safe_read(). 
2005-08-31 15:39:16.660 RemoteFile::Read() failed in 
RingBuffer::safe_read(). 
2005-08-31 15:39:16.869 RemoteFile::Read() failed in 
RingBuffer::safe_read(). 
2005-08-31 15:39:17.078 RemoteFile::Read() failed in 
RingBuffer::safe_read(). 
2005-08-31 15:39:17.287 RemoteFile::Read() failed in 
RingBuffer::safe_read(). 
2005-08-31 15:39:17.496 RemoteFile::Read() failed in 
RingBuffer::safe_read(). 
2005-08-31 15:39:17.511 LiveTV not successfully started 
2005-08-31 15:39:17.522 Changing from None to WatchingLiveTV 
2005-08-31 15:39:17.550 Using protocol version 15 
2005-08-31 15:39:17.783 Using protocol version 15 
2005-08-31 15:39:17.974 Using protocol version 15 
2005-08-31 15:39:18.188 Using protocol version 15 
2005-08-31 15:39:18.383 Using protocol version 15 
2005-08-31 15:39:18.574 Using protocol version 15 
2005-08-31 15:39:18.769 Using protocol version 15 
2005-08-31 15:39:19.013 Using protocol version 15 
2005-08-31 15:39:19.166 Using protocol version 15 
2005-08-31 15:39:19.398 Using protocol version 15 
2005-08-31 15:39:19.605 Using protocol version 15 
2005-08-31 15:39:19.708 Using protocol version 15 
2005-08-31 15:39:20.233 RemoteFile::Read() failed in 
RingBuffer::safe_read(). 
2005-08-31 15:39:20.442 RemoteFile::Read() failed in 
RingBuffer::safe_read(). 
2005-08-31 15:39:20.651 RemoteFile::Read() failed in 
RingBuffer::safe_read(). 
2005-08-31 15:39:20.860 RemoteFile::Read() failed in 
RingBuffer::safe_read(). 
2005-08-31 15:39:21.069 RemoteFile::Read() failed in 
RingBuffer::safe_read(). 
2005-08-31 15:39:21.278 RemoteFile::Read() failed in 
RingBuffer::safe_read(). 
2005-08-31 15:39:21.293 LiveTV not successfully started 
2005-08-31 15:39:21.304 Changing from None to WatchingLiveTV 
2005-08-31 15:39:21.323 Using protocol version 15 
2005-08-31 15:39:21.743 Using protocol version 15 
2005-08-31 15:39:22.186 Using protocol version 15 

What is wrong? 
How to solve it?