[mythtv-users] Losing time while watching live tv or recorded tv

John Hardman tptac.jhardman at gmail.com
Sun Mar 4 20:21:18 UTC 2007


I have been having a strange problem of late that is very frustrating. When
I watch live tv or recorded tv, my system is losing time, a lot of time,
upwards of 2-3 mins per hour. Recording or anything else that myth does,
does not seem to effect the time. I have another FC6X64 workstation with the
same NTP config that never loses time.

My setup: FC6x64 using ATRPMS for all packages. All packages current. NTP
configured and working, except when watching tv or recordings. My firewall
is setup to allow UDP 123 and does show connections from the myth box on
123.

Sample of var/log/messages for NTP for last night... Notes, I restarted the
daemon at 23:15 after watching live tv for a couple of hours, knowing I had
upcoming recordings. Recordings started at 00:30 and ended at 01:30, and I
watched those recordings between 05:50 and 06:21 (yes I noted the time). All
output below are while watching live tv.

Mar  3 23:15:03 mythtv ntpdate[12492]: step time server 66.187.233.4
offset 256.218202 sec
Mar  3 23:15:03 mythtv ntpd[12495]: ntpd 4.2.4 at 1.1437 Mon Jan 29
13:58:07 UTC 2007 (1)
Mar  3 23:15:03 mythtv ntpd[12496]: precision = 1.000 usec
Mar  3 23:15:03 mythtv ntpd[12496]: Listening on interface #0
wildcard, 0.0.0.0#123 Disabled
Mar  3 23:15:03 mythtv ntpd[12496]: Listening on interface #1
wildcard, ::#123 Disabled
Mar  3 23:15:03 mythtv ntpd[12496]: Listening on interface #2 lo,
::1#123 Enabled
Mar  3 23:15:03 mythtv ntpd[12496]: Listening on interface #3 eth0,
fe80::214:2aff:fed2:97a#123 Enabled
Mar  3 23:15:03 mythtv ntpd[12496]: Listening on interface #4 lo,
127.0.0.1#123 Enabled
Mar  3 23:15:03 mythtv ntpd[12496]: Listening on interface #5 eth0,
192.168.100.10#123 Enabled
Mar  3 23:15:03 mythtv ntpd[12496]: kernel time sync status 0040
Mar  3 23:15:03 mythtv ntpd[12496]: frequency initialized -36.779 PPM
from /var/lib/ntp/drift
Mar  3 23:19:21 mythtv ntpd[12496]: synchronized to 193.224.70.6, stratum 2
Mar  3 23:19:21 mythtv ntpd[12496]: kernel time sync enabled 0001
Mar  3 23:38:39 mythtv ntpd[12496]: synchronized to 194.117.9.130, stratum 2
Mar  3 23:48:31 mythtv ntpd[12496]: synchronized to 193.224.70.6, stratum 2
Mar  4 00:30:09 mythtv ntpd[12496]: synchronized to 194.117.9.130, stratum 2
Mar  4 00:31:22 mythtv ntpd[12496]: no servers reachable
Mar  4 02:06:43 mythtv ntpd[12496]: synchronized to 193.45.254.143, stratum 3
Mar  4 02:10:27 mythtv ntpd[12496]: time reset +224.474556 s
Mar  4 02:18:59 mythtv ntpd[12496]: synchronized to 193.224.70.6, stratum 2
Mar  4 06:21:20 mythtv ntpd[12496]: synchronized to 194.117.9.130, stratum 2
Mar  4 06:22:37 mythtv ntpd[12496]: synchronized to 193.45.254.143, stratum 3
Mar  4 06:23:15 mythtv ntpd[12496]: no servers reachable
Mar  4 06:55:32 mythtv ntpd[12496]: synchronized to 193.224.70.6, stratum 2
Mar  4 06:57:13 mythtv ntpd[12496]: time reset +27.916502 s
Mar  4 07:02:05 mythtv ntpd[12496]: synchronized to 194.117.9.130, stratum 2
Mar  4 07:05:52 mythtv ntpd[12496]: synchronized to 193.224.70.6, stratum 2
Mar  4 07:26:44 mythtv ntpd[12496]: synchronized to 194.117.9.130, stratum 2
Mar  4 07:39:05 mythtv ntpd[12496]: synchronized to 193.224.70.6, stratum 2
Mar  4 08:43:19 mythtv ntpd[12496]: synchronized to 194.117.9.130, stratum 2
Mar  4 09:43:11 mythtv ntpd[12496]: synchronized to 193.224.70.6, stratum 2
Mar  4 11:57:15 mythtv ntpd[12496]: synchronized to 194.117.9.130, stratum 2
Mar  4 11:59:48 mythtv ntpd[12496]: no servers reachable

Output of ntpstat....

synchronised to unspecified at stratum 3
   time correct to within 123 ms
   polling server every 1024 s

Output of ntpq -p

     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
 enfield.ikk.szt 195.111.96.158   2 u  547 1024  377  176.221  198504.
42903.0
 ntp02.oal.ul.pt 194.117.9.129    2 u  394 1024  377  214.591  204972.
43063.0
 srnf0501.asplen 212.94.162.33    3 u  108 1024  377  158.446  216889.
42923.4


Output of  ntpdate 195.111.96.158

 4 Mar 13:15:47 ntpdate[32289]: the NTP socket is in use, exiting

 Thanks for any help in trouble shooting this.
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