john at clonts.org
Mon Apr 2 13:38:09 UTC 2007
On 3/31/07, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> On 03/31/2007 07:00 PM, John Clonts wrote:
> > On 3/28/07, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> > [snip]
> >> using the "Delete All" button in mythtv-setup's Video Sources screen.
> > [snip]
> >> Definitely true. If you use "Delete All", Myth will take care of all
> >> the issues for you.
> > I've wondered this for a while:
> > 1) What is the difference between "Delete All" and "Delete All from
> I'm guessing the hostname of your Myth box is "Myth." :)
> The Delete All buttons do truncates. "Delete all capture cards on
> <hostname>" deletes only those capture cards on this hostname (and,
> therefore, does not do truncates--as there may be data for other hosts
> in there). So, even if you have only one host, there /is/ a difference.
> Most of the time when people have issues with their capture card/video
> source/input connections/channels configuration it's due to leaving
> around something that shouldn't be there.
> "Delete all capture cards" truncates capturecard and cardinput
> tables--meaning there's nothing left and you're starting from a clean
> slate (including card ID's). Since mythtv-setup only displays info
> about those capture cards on /this/ host, there may be many you don't
> see (this happens a lot for single combined frontend/backend setups when
> people change hostname/IP address without following the instructions on
> the HOWTO - http://mythtv.org/docs/mythtv-HOWTO-23.html#ss23.15 ).
> "Delete all capture cards" will clear out those others, but "Delete all
> capture cards on <hostname>" won't.
> As far as video sources go, there should only be a "Delete all video
> sources" button (video sources are handled by the master backend and
> don't apply to specific hosts). "Delete all video sources" will
> truncate channel, program, videosource, credits, programrating,
> programgenres, dtv_multiplex, and cardinput. Again, the most common
> problem with configuration of video sources/input connections/channels
> is leaving something in the table that shouldn't be there (but that
> might not be visible through the interface because Myth thinks it's some
> other hosts data or ...).
> I shorten the button names to "Delete All" (and for capture cards say,
> "and not the 'on this host' one") because I never can remember the exact
> wording and--to date--haven't felt it worthwhile to look them up every
> time I type it (I post this suggestion a /lot/). If, however, you feel
> that my suggestion is confusing, please let me know and I'll do better
> about using the exact wording.
> > and
> > 2) Is there any way to "Delete One". I've tried highlighting and and
> > hitting delete, D, etc. but can't seem to do it.
> You should be able to do so by just pushing 'D' (unless you've re-mapped
> key bindings). However, IMHO, doing so is only asking for trouble. :)
> So, if you figure out how to make it work and someday you can't fix a
> broken system using it, I never told you how to delete just one.
Thanks for the excellent explanation!
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