26 thoughts on “MythTV on Ubuntu Karmic”

  1. Hi. Your MythTV website is easily the best MythTV resource that I’ve found for a UK-based Ubuntu user, and, having been using Myth since the days of Warty Warthog, I’ve been leaning heavily on you for several years. Thanks for the help that you’ve unknowingly given me.

    I found the Karmic update particularly problematic, and many parts of MythTV broke badly for me. I’ve posted my travails onto the Ubuntu Forums (http://ubuntuforums.org/showthread.php?t=1346529), and you might want to pick up on a couple of these issues in your website to help other users who might be struggling. Feel free to claim any parts of my solutions as your own – I’ve learned enough from you over the years to not feel precious about being given credit.

  2. Hi Jonny,

    Thank you very much for that.

    Probably it’s down to experience, but I am wary of dist upgrades on my MythTV box. For that reason, my main box is still on Jaunty! I do intend to upgrade, so the solutions you’ve found should help me a lot.

    Cheers,
    Garry.

  3. Hi Garry,

    I’ve just upgraded to MythTV v0.22 by upgrading to Karmic! :)
    AOK so far, bar the hourly cron message from mythvideo. ;)

    I’ve got 3 machines on karmic now and myth is working on all, but it took me a little while to work out why some went to fullscreen and some did not. Turns out it’s just the users settings as explained here (in Jaunty):

    https://lists.ubuntu.com/archives/universe-bugs/2009-March/067075.html
    If “Visual Effects” are enabled on the Gnome desktop (System –>
    Preferences –> Appearance –> Visual Effects), mythfrontend doesn’t go
    full screen, but the Gnome panels show.

    Anyway, I’m hoping to get a TV with DLNA (Ethernet) this year so that I can use it as a DLNA client of my MythTV UPNP server. A friend has just done a similar thing and thinks it’s fantastic to have the server out of the sitting room.

    Do you have any experience with DLNA TVs and MythTV?

  4. OK, so in v0.22, in the Watch Recordings menu, when I hit the / key (the forward slash key) it puts a big green tick (check) to the left of one or all of the named recordings.

    What does this big green tick mean? What does it do?

    Any ideas?

  5. Hi Will,

    You won’t believe this, but my box was on intrepid until this week! I’ve just been really busy (new baby and all that), so I just took an “if it ain’t broke don’t fix it” mentality.

    Anyway, I upgraded from intrepid to jaunty this week (no issues), so I’ll go to karmic and 0.22 this weekend.

    It seems that quite a few people have had problems, so thanks for posting the links.

    I also treated it to a 1.5TB disk, so no more fighting for space!

    Garry.

  6. Hi Garry,

    Just to say that although 0.22 works fine for me, there appears to be a couple of things missing, like no moving picture in the little preview window on the Watch Recordings screen. It just does not exist! (Developers didn’t put it in!) Google it! :) It’s a minor thing that I can live without, but if you’ve come to rely on things like that then have a good read up on karmic and 0.22 before taking the plunge. I’m getting a few annoying daily cron job emails from mythtv things too – not sure what that’s all about.

    Anyway, I’m happy with it and with karmic, but perhaps I’m just lucky that the things I want are there and work. (Totem turned all video playback blue so you might have to reset the hue slider on that if ever you see blue tinted video.)

    My reason for upgrading to karmic was to prepare for upgrade to the LTS release Lucid in April/May 2010. I want to get back to the LTS stream as life is stabler and quieter with that – fewer updates! :)

    Enjoy the 1.5TB disk! It’ll soon fill up! :)

    All the best.

  7. Hi Will,

    I don’t use the moving preview anyway, if find it a bit snappier that way!

    Thanks for the info, I’ll post how I get on.

    Garry.

  8. Hi,

    I thought I’d point out a nasty little bug that cost me a fair bit of time.

    When configuring myth for freesat, in some themes one can’t see the buttons in the LNB config page.

    This leads to a failure when trying to scan as the DVB adapter doesn’t configure the LNB.

    Cheers,

    Lou

  9. Hi Lou,

    Yes, I’ve been hit by that by, too.

    I updated the guide with this info the other day.

    “Hit the DiSEqC button and set it to LNB, or one of the other options, depending on your hardware setup (see http://www.mythtv.org/wiki/DVB-S). The button was a bit flaky for me on 0.22. Hit the cursor keys a few times and it should work. You MUST set this or the channel scan will fail!”

    Hope it’s clear.

    Garry.

  10. Hi all – I’d echo the comments of many visitors to this site that your site is a solid resource for building a myth box and one I used a lot when I built my first combined BE/FE on Ubuntu 8.10 around 12 months ago. It wasn’t all plain sailing, I had lots of problems with the on-board graphics chip on my Gigagbyte MB and with the IR receiver on the Fusion case but thats part of the fun and gradually I’ve got everything to a point where its fairly rock solid. One problem eludes me which I’m hoping someone might have a view on. I’m using the Gigabyte onboard HDMI port to feed the signal to a Sony HD flat screen. This works fine and the picture is excellent except that I use MythWelcome to start and stop the box so that I don’t need to have it on all the time. If the box has already started (EG to start a recording) and I then turn the TV on I get the Mythwelcome screen but the FE wont start. The logs don’t seem to give any clues as to what the problem is but I’m guessing its something to do with the box not being able to get the video mode settings when it starts up because the TV is turned off?
    As Sony LCD tvs are quite common I wondered if anyone else had seen this problem?
    Cheers
    Steve

  11. Hi Steve,

    It seems strange that the frontend won’t start at all. Have you tried running it from the command line to see its output?

  12. Hi Gary – thanks for the quick reply. What happens is that the Mythwelcome page comes up but it will not respond to either keyboard or remote commands. If I try to ssh into the box from another PC I get response ‘no route to host’ (although it normally works), so I can’t try and see whats happening. Once recording finishes and it goes idles Mythwelcome shuts it down (as intended).
    Any trouble shooting ideas please?
    Regards
    Steve

  13. The important point here is that you cannot SSH into the box. However, why this would happen only when it powers up and your TV isn’t on I’m not sure. How that can affect networking is beyond me. I mean, it’s not as if the box has crashed completely because it still does the recording and shuts down.

  14. I’ve got the same prob with a Pansonic TV and a minimyth frontend. I’ve a suspicion it’s something to do with xorg not being automatically configured properly if the TV is off. Check the xorg logs after you’ve booted successfully (/var/log/X11/xorg.log.1 ??)

    I’ve not looked into it too carefully cos I tend to turn the TV and FE together at the socket ;)

  15. Just a quick note in case anyone out there has this issue with Mplayer and TV programmes recorded in UK (e.g. using MythTV.)

    I was using mplayer on the Nokia N900 to play an MPEG-2 mpg file I had copied to it from my MythTV server. These MPEG-2 files are just TV programmes I’ve recorded from BBC 1 and so on, of course.

    Anyway, some of them were totally silent (no audio) and it turned out I just needed to change the selected audio track from track 0 to track 1.

    You do this by pressing #
    (on mplayer on the N900 you need to *hold down* the diagonal blue arrow fn key and press # (on the D key))

    Note: You might also need to use the following args to keep video and audio in synch in mplayer:

    mplayer -vfm ffmpeg -lavdopts lowres=1:fast:skiploopfilter=all mymovie.mpg

    HTH

  16. Just followed your instructions for installing MythTV which I did on a laptop with a smashed screen; it is working great and is an ideal MythTV platform due to its quietness and low power consumption; if it wasn’t up the the job I had an Acer Revo 3610 in reserve.

    I bought the Hauppage WinTV USB TD diversity for it, and so far it has been perfect.

    I only had two issues, both of which I have now resolved; the first was that I couldn’t get rid of the menu and status bar. I found a posting which suggested installing Compiz settings manager and selecting enable legacy fullscreen which worked.

    The other had to do with Ubuntu selecting the correct screen resolution; this is something that Windows and the Mac do so much better (being able so select an ‘unsupported’ resolution without having to go into xorg.conf!!! In my case, for some reason which I can’t explain, when I used one HDMI cable, it only gave me an option of a resolution of 1280 x 720 but when I plugged in another cable (same tv), it gave a correct resolution of 13xx x 720. Both HDMI cables were cheap ones from Amazon, but I never expected there would be a ‘wrong’ HDMI cable. I still couldn’t believe this was the case so plugged in the Acer Revo (which has a totally different Nvidia Ion graphics compared to the crappy Intel 4500MHD the laptop has) but got exactly the same behaviour. Odd!

    Anyway, many thanks again for your guide; it saved me no end of time!

  17. I suspect that the people with HDMI issues are running foul of DDC (Display Data Channel). The first thing that the HDMI host does is ask the display what resolutions it supports, I’m guessing that the host simply times out if the TV is off and thus does not get a reply? DVI does not have this problem. I had to use a DVI->HDMI cable (plus seperate sound cable) to fix a similar but related issue.

  18. Error:

    Instead of

    “The first thing that the HDMI host does”

    I should have said that

    “The second thing that the HDMI host does”

    The “first” thing is to boot with a low default resolution, then ask what resolutions are supported. I’m guessing that this is where it hangs?

  19. Hi,
    I’d like to pose a general question to the forum.

    I’m running a dedicated myth FE on a fairly low spec system, with embedded Intel graphics. I use xvmc to provide hardware assisted SD live-TV playback.

    For HD, the UK transmits only H264 standard. This standard is not supported by xvmc, forcing my FE to use software decoding, which it is incapable of doing. (It is VERY close, but not quite)

    I have a couple of things to try:

    1) Via the FE: Use the recently released VAP-API (libva) library instead of xvmc (probably via e.g. mplayer initially, then later integrate into myth) which does support H264.

    2) Via the BE: “live” encode the incoming h264 stream to disk as MPEG2 which xvmc can then decode (maybe ?).

    Just wondering if anyone had attempted either of these methods, possibly for some other reason, or can suggest any better alternatives?

    Thanks

  20. A quick update on my own question 1) . I have now built the mplayer va api version. Sound is fine, but no video, I get a driver-missing error : It seems that unfortunately my Intel 945GM is not directly supported. I’m investigating the recent Intel IEGD release as a possible patch solution, unless I see a ready-built alternative. I have reported this here as 915 owners seem to have reported success, so this information may help any of you to get HD FE running on previously “under powered” FE’s

  21. Can I simply say what a reduction to seek out someone who actually knows what theyre speaking about on the internet. You definitely know find out how to bring an issue to mild and make it important. More people must read this and perceive this side of the story. I cant imagine youre no more well-liked since you positively have the gift.

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