[mythtv-users] Remote Mythfrontend Problem

[Richard Morton]

Hi

You are running at least a 100mbps network?

Try buying a cross-over cable and directly connecting your backend to the
fdront end to see if you still get problems; my guess is that this is cpu,
memory or most likely networking problems.

If the cross over cable works try replacing the cables, but again most
likely your using a low quality or defective network hub/switch; try
upgrading to a well known brand of networking switch.

If you are using a network hub and just one device is connected at 10mbps
such as print servers them it drags the entire network down to 10mbps.

Hope that helps

R

Please excuse brevity and mistakes, this email was composed on a mobile
phone.

Thanks and regards,
Richard Morton
07899750400



On Jul 17, 2009 9:48 PM, "Steve Milner" <mythtv at stephen-milner.me.uk> wrote:

Right I have done some further tests.

With both the backend machine running a frontend and remote frontend tuned
to the same channel I could not see or hear any problems on the backend
machine

I let both the frontend and backend machines log the frontend output for a
couple of hours and then compared the logs.

An initial examination of the frontend logs revealed:

Log on the backend: 184 Lines
Log on the remote frontend: 4444 Lines

Typical sample from the frontend log on the backend machine:
2009-07-17 19:00:29.202 [dvbsub @ 0x605f180]Junk in packet
2009-07-17 19:00:29.203 [dvbsub @ 0x605f180]Invalid object location!
2009-07-17 19:01:17.852 [dvbsub @ 0x605f180]Junk in packet
2009-07-17 19:01:17.852 [dvbsub @ 0x605f180]Invalid object location!
2009-07-17 19:03:37.002 [dvbsub @ 0x605f180]Junk in packet
2009-07-17 19:03:37.003 [dvbsub @ 0x605f180]Invalid y position!
2009-07-17 19:03:37.003 [dvbsub @ 0x605f180]Invalid object location!
2009-07-17 19:04:59.899 [dvbsub @ 0x605f180]Junk in packet
2009-07-17 19:04:59.899 [dvbsub @ 0x605f180]Invalid object location!
2009-07-17 19:06:23.199 [dvbsub @ 0x605f180]Junk in packet
2009-07-17 19:06:23.200 [dvbsub @ 0x605f180]Invalid object location!
2009-07-17 19:12:42.143 [dvbsub @ 0x605f180]Junk in packet
2009-07-17 19:12:42.143 [dvbsub @ 0x605f180]Invalid object location!
2009-07-17 19:19:10.808 [dvbsub @ 0x605f180]Junk in packet
2009-07-17 19:19:10.809 [dvbsub @ 0x605f180]Invalid object location!
2009-07-17 19:21:56.853 [dvbsub @ 0x605f180]Junk in packet
2009-07-17 19:21:56.890 [dvbsub @ 0x605f180]Invalid object location!

Typical sample from the remote frontend log:
2009-07-17 19:02:09.255 [mpeg2video @ 0x3b9533f620]invalid cbp at 36 1
2009-07-17 19:02:13.685 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 8
2009-07-17 19:02:13.685 [mpeg2video @ 0x3b9533f620]skipped MB in I frame at
1 9
2009-07-17 19:02:13.685 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 10
2009-07-17 19:02:13.686 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 11
2009-07-17 19:02:13.686 [mpeg2video @ 0x3b9533f620]skipped MB in I frame at
1 12
2009-07-17 19:02:13.686 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 13
2009-07-17 19:02:13.686 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 14
2009-07-17 19:02:13.686 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 15
2009-07-17 19:02:13.687 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 16
2009-07-17 19:02:13.687 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 17
2009-07-17 19:02:13.687 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 18
2009-07-17 19:02:13.687 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 19
2009-07-17 19:02:13.687 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 20
2009-07-17 19:02:13.687 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 21
2009-07-17 19:02:13.687 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 22
2009-07-17 19:02:13.687 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 23
2009-07-17 19:02:13.688 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 24
2009-07-17 19:02:13.688 [mpeg2video @ 0x3b9533f620]ac-tex damaged at 0 25

I am afraid my knowledge of what these errors mean is lacking, but
superficially it seems like running the frontend on the same machine as the
backend is working within (at least my own) acceptable limits and the remote
frontend is having significant problems.

I would guess the problem is related to networking, but I have to be honest
that is only a guess.

Any advice that can be given would be of benefit, especially someone with
better knowledge who could interpret the meaning in the logs to point me in
the correct direction as to where my problem could be.

BTW the attenuator I experimented with seems to have had little effect, but
was still in line when running the above tests.

Regards, Steve _______________________________________________ mythtv-users
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