[mythtv-users] Toggling compositing

Mon Mar 25 02:58:15 UTC 2013

On 25/03/2013 8:19 AM, "Chris" <gcsa60 at gmail.com> wrote:
>
> On 13-03-24 01:40 PM, Igor Cicimov wrote:
>>
>>
>> On 25/03/2013 7:02 AM, "Chris" <gcsa60 at gmail.com> wrote:
>> >
>> > On 13-03-24 12:07 PM, HP-mini wrote:
>> >>
>> >> On Sun, 2013-03-24 at 11:00 -0700, Chris wrote:
>> >>>
>> >>> Hello Everyone,
>> >>>
>> >>> I have very naive newby question.
>> >>>
>> >>> When I setup my MythTV frontend I was having some trouble with
tearing.
>> >>> I originally had the video playback profile set at Normal and I read
>> >>> somewhere that what I really wanted was VDPAU so I started messing
>> >>> around with the settings but couldn't get it to work at first. (For
the
>> >>> record the GPU is GeForce 8200/integrated/SSE2 and the CPU is AMD
>> >>> Athlon(tm) Dual Core Processor 4850e × 2). The MythTV Official Wiki
had
>> >>> a few suggestions one being to place the following in my
/etc/X11/xorg.conf:
>> >>>
>> >>>    Section "Extensions"
>> >>>         Option "Composite" "Disable"
>> >>>     EndSection
>> >>>
>> >>> I think this was already in my xorg.conf  because it's there now and
I
>> >>> don't remember putting it in (but that's another story).
>> >>>
>> >>> The problem is, I have recently downloaded the Netflix app onto my
>> >>> computer and it wants compositing enabled.  So I looked for
solutions
>> >>> and I found that I have a package on my computer called
>> >>> plasma-widget-toggle-compositing which looks like it might do the
>> >>> trick.  My question is:
>> >>>
>> >>> If I enable this widget is it going to screw-up Mythtv somehow
(Synaptic
>> >>> Package Manager suggests it is linked to file associated with
Mythtv)?
>> >>>
>> >>> My guess is no; but, I have had so much trouble getting this thing
to
>> >>> work and wasted so much time fixing mistakes that I really want to
avoid
>> >>> them.
>> >>>
>> >>> Other possibly relevant information is that I'm using Mythtv 0.26
run on
>> >>> Ubuntu 12.04.
>> >>>
>> >>> Thank you once again for your help and guidance.
>> >>> Chris
>> >>>
>> >> Lots of people have problems with tearing so I don't think the
solutions
>> >> are so obvious..
>> >> I assume you are using unity desktop (compiz plugin).
>> >> I have never had to disable composite (disables effects managers) on
old
>> >> lucid gnome 2 or 12.04 with unity/fallback/consort/kde/etc..
>> >>
>> >> To get the best performance (mythtv & vdpau) you need vdapau to use
>> >> video overlay (guarantees no tearing) & that requires
>> >> composite/re-direction to be blocked.
>> >> You can use "ccsm" to tweak a couple of compiz/unity settings:
>> >> - enable un-redirect full screen
>> >> - enable legacy full screen support
>> >> Be very cautious with this tweak tool, unity seems not completely
>> >> compatible with compiz setting tool.
>> >> Of course this only works with mythtv in full screen mode.
>> >>
>> >> Another possible problem is the incorrect refresh rate reported by
>> >> nVidia driver (when using twinview metamodes).
>> >> If using twinview you may need to manually set the composite refresh
>> >> rate (no auto detect).
>> >> AFAIK Later nVidia drivers have solved the incorrect refresh
reporting.
>> >>
>> >> I don't know about the plasma-widget-toggle...
>> >>
>> >> Brett
>> >>
>> >> _______________________________________________
>> >> mythtv-users mailing list
>> >> mythtv-users at mythtv.org
>> >> http://www.mythtv.org/mailman/listinfo/mythtv-users
>> >
>> > Thanks Brett,
>> >
>> > When I first read your e-mail I thought you had misunderstood the
issue but on reading it again I get the impression that your telling me
that I can take take the  "Option "Composite" "Disable"" command out of my
/etc/x11/Xorg.conf.   Is that correct?
>> >
>> > If you are suggesting I take it out, do I just change it to the below
or just delete all three lines from the file?
>> >
>> >    Section "Extensions"
>> >         Option "Composite" "Enable"
>> >     EndSection
>> >
>> > Currently I have Mythtv running under VDPAU slim (still stutters
horribly under VDPAU normal or high quality) and I am very happy with the
picture quality .  I was trying everything under the Myth Official Wiki but
the last thing I did was add the line below to my /etc/X11/Xorg.conf  and
it seemed to do the trick.
>> >
>> >    Option         "TripleBuffer" "True"
>> >
>> > I actually considered taking the Composite Disable command out of my
Xorg.conf file but because I didn't remember adding it in the first place
(and I might have because I have been tweaking like a madman since boxing
day (the day I entered the world of linux and mythtv)), I was worried that
it was necessary for the operating system (of course I don't really
understand what compositing is).
>> >
>> > Thanks again
>> > Chris
>> >
>> There is a setting, tick box, somewhere in the frontend to separate
mythtv screen from the desktop. Do you have it ticked?
>>
>>
>>
>> _______________________________________________
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>> mythtv-users at mythtv.org
>> http://www.mythtv.org/mailman/listinfo/mythtv-users
>
> Do you mean under Setup>Appearance>Video Mode Settings> Separate Video
Modes for GUI and TV Playback?
>
> If so the answer is I don't have that checked because it creates terrible
overscan or underscan which persists even when I shutdown  Mythtv Frontend.
I have to reboot to make it right again.
>
> Two observations of probable significance.
> 1) I removed the composite disable line from my Xorg.conf, rebooted and
now VDPAU Slim does not work (stutters).
> 2) I checked the Separate Video Modes for GUI and TV Playback box (still
compositing enabled)  and VDPAU Slim still doesn't work. Have to reboot now
because of overscan.
>
> _______________________________________________
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> mythtv-users at mythtv.org
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>
You need to fix the overscan inside nvidia control panel.
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