I have a Panasonic DMR-EH75V with TVGOS 9.
I have experienced losing my changes in the channel editor a few times.
There are two different levels of severity.
- Losing all changes since choosing the channel lineup.
- Losing changes made during my last channel editor session.
Something I've noticed and I've heard others comment on as well is: don't make too many changes in the channel editor at one time. Periodically exit the channel editor and then go back into it.
Something else I've noticed is that you have to be patient when trying to get back into the channel editor. One time I exited and then right away tried to get back in. Nothing happened. I pressed the [TV Guide] button a few more times. When I finally did get back in all of my changes were lost.
What I think happens is when you exit the channel editor it sifts and sorts through what you did. It is busy working. If you get impatient it gets upset at you. And as payback it discards your work.
Now a trick to knowing when it is ok for you to get back in is the following:
When in the channel editor don't press the [TV Guide] button or [Return] to exit.
Instead choose [Submenu] and then choose "Go back to listings".
And speaking of this [Submenu] exit strategy this is also my preferred way of switching from one channel lineup to another.
Say I'm just experimenting choosing the different channel lineups:
TV Guide > Setup > Change System Settings > Yes, but my channel lineup is incorrect.
when I'm done viewing the channels in the channel editor I choose [Submenu] and then that "Go back to listings" menu item now says "Go back to setup". After this I get the chance to choose another lineup.
I realize that there might be some additional issues TVGOS 7 users face that TVGOS 9 users don't. Simply because TVGOS 7 is older.
Also I think it might be possible for Macrovision (aka Gemstar) to remotely issue a reset command which forces your TVGOS device to make you choose a channel lineup and hence lose all of your changes. I mean the reset instruction comes in as part of the downloaded data, of course. This is just a suspicion that this capability exists. But the reasoning for this would be that maybe many of the call sign letters changed and the only time new ones are added is when choosing a new lineup. (= it isn't smart enough to update the call sign letter changes on its own)
In this message I mentioned some of the call sign letter changes I've seen. I think the new ones only get recognized because I was actively experimenting with choosing different channel lineups.
Since getting the DTVPal Plus in February I've not experienced having my changes disappear out of the blue. It was always on the heels of me doing something. Not that I remember anyway. Prior to that I do seem to remember it happening. Maybe even years ago now.
What I'm seeing is much more like a full reset to the 4 original channels and nothing else available in the channel editor. It's happened 3 times since I started receiving the digital feed several weeks ago. Not sure what too many changes would be, ie. % or a certain number. I have 4 channels I add 4(9.1, 20.1, 59.1 and 6.3). That's only 4 but a 100% change. This is a behavior I never experienced with the analog PBS feed even after extensive editing and re-arranging of the channels.
The EH50 - V7 doesn't have the submenu options you mention. When you hit submenu it just takes you back to the top of the screen with Setup highlighted. Not sure that's any different than the fact that I've been scrolling back to up to setup line manually then navigating back over to the listings to see what's displayed.
Yes, Macrovision may well be issuing a reset command. I checked the eh50 tonight after the afternoon download and the edited channel line up is still there - no updated listings or channel list reset. Note, I am never offered a channel line up to choose from initially. I only see channel lineup 1 when I go into setup-> channel lineup is incorrect -> Lineup 1 or No Match. I've never seen any additional lineup offered on the EH50.
I would be less perplexed if 20.1 and 9.1 were showing up in the default channel list since they turned off their analog transmission on April 16th along with 7.1, which is in the default list.