[mythtv] nVidia screen switching

[John Pilkington]

On 03/01/2020 14:26, Mark Kendall wrote:
> On Fri, 3 Jan 2020 at 11:09, John Pilkington <johnpilk222 at gmail.com> wrote:
>> Hi Mark:  Thanks for that.  I don't know how far down the line you are
>> at present, but my most recent builds have had 'Appearance' problems.
>> I'm currently at 27188d.  I can send more details if you like.
>>
>> The fonts are too wide, so text is often incomplete
>>
>> Aspect ratio:  the picture is half-height, centred.  The only likely
>> option, 'Virtual monitor aspect ratio', seems to be doing nothing on
>> either screen.  Default settings are still as above.  The 'Display on
>> screen' option has not been effective.
> 
> I pushed fixes for moving screens this morning and have just added a
> workaround for nvidia stupidity which caused the font scaling issue.
> 
> I did a little quick testing with 2 connected monitors and it seems to
> be working OK.
> 
> There are still some issues around multiscreen setups. Of those that
> are MythTV code issues - the major problem is configuring a secondary
> screen and using display resolution switching - it will currently
> almost always break down until mythfrontend is restarted. Leads to
> some very confusing behaviour until it is sorted.
> 
> Other than that, you tend to get broken vsync - and hence tearing -
> unless the 2 displays are using exactly the same modeline. I notice on
> nvidia that switching modelines on 1 display also impacts the output
> on the other - which doesn't happen on intel at least. This is an
> older card with legacy drivers - may be better on newer cards.
> 
>> ... and the NVDEC detection on first startup is still unreliable.  It
>> seems to need shaking in.
> 
> I'll revisit this when I have reinstalled my nvdec capable card.
> 
> Thanks and regards
> Mark

Thanks to you, too.  At current Head 1d4d51b it's working well - and my 
recordings of HD and SD test cards exactly fill their boxes.  I'm still 
using my old overrides and haven't probed much, but it's looking good 
again.  The status display is nice too - although it's telling me that 
Dell made my tv...

Cheers,

John