Re: [gentoo-user] Getting X11 to "underscan"...

[Stroller]

> On 19 Oct 2016, at 05:38, Jigme Datse Yli-RAsku 
>  wrote:
> 
> In terms of the make and model, it is a Panasonic Viera TC-P42S30.

"On a Panasonic Viera TC-P42S30 the option is Menu/Picture/Aspect 
Adjustments/Screen Format = FULL and HD Size = 2"

http://www.komeil.com/blog/fix-cropped-picture-cut-off-screen-tv-hdmi-dvi

https://www.reddit.com/r/techsupport/comments/qx7zm/problem_connecting_panasonic_viera_tcp42s30/

Stroller.

Re: [gentoo-user] Getting X11 to "underscan"...

[Jigme Datse Yli-RAsku]

The output of xrandr is attached (not sure if that works or not).  Every
single resolution fails to work.  As I drop down to about 640x480 it
*almost* displays enough to be workable, but at that resolution on a
41.6" display is really not going to work.  There were about 4
resolutions (with the KDE Hardware settings) which actually worked.

No, there is no VGA input on the TV.  The video card is already using
VGA, and I don't believe that monitor actually has any other alternative
anyway.  Thank you for your help.

On 2016-10-18 05:20, Michael Mol wrote:
> On Monday, October 17, 2016 07:48:29 PM Jigme Datse Yli-RAsku wrote:
>> So far after much digging on the TV I haven't found a way to actually get it
>> to do what I want.  I'm not sure if it even can.  I will look when I next
>> get access to the system (currently in use by other members of the
>> household).  Perhaps somewhere we have a manual for it?  I really don't
>> know.
>>
>> I agree, that it would be preferable to not have to make the computer fudge
>> it, but if after having spent time trying to fix it on the TV itself
>> multiple times, only to find that all options I have found, end up
>> producing very undesirable results (such as displaying it a 4:3 aspect
>> ratio, or a 2:1 aspect ratio).  I'll see if I can find what I need.
>>
>> I do know that if I could get the TV to change the setting for that so it
>> doesn't end up overscanning, without doing other "weird" stuff, it would
>> mean that I could see the full boot process, not missing bits of it off the
>> edge of the screen.
>>
> 
> Once upon a time, in the days of analog displays, we used modelines to 
> accomplish what you're doing.
> 
> I don't think modelines work with pure-digital outputs, though. Does your TV 
> have a VGA input, and does your box have a VGA output? That would be an 
> effective, if not ideal, solution.
> 
> Alternately, have you tried setting your display to an unusual resolution? 
> What's the output of the xrandr command? It should give you a list of 
> supported resolutions refresh rates, including flags to tell you which ones 
> are 
> selected and which ones are recommended. Often, with digital TVs, there will 
> be a resolution you can use that evades the TV's overscan emulation.
> 

-- 
Jigme Datse Yli-Rasku
jigme.da...@datsemultimedia.com (Preferred address for new messages)
250-505-6117

Jigme Datse Yli-Rasku
PO Box 270
Rossland, BC V0G 1Y0
Canada

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Screen 0: minimum 320 x 200, current 3200 x 1080, maximum 8192 x 8192
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y 
axis) 698mm x 392mm
   1920x1080 60.00*+  59.9424.0023.98  
   1920x1080i60.0059.94  
   1400x1050 59.98  
   1280x1024 60.02  
   1280x960  60.00  
   1280x720  60.0059.94  
   1024x768  60.0460.00  
   960x720   60.00  
   1440x480i 59.94  
   928x696   60.05  
   896x672   60.01  
   800x600   60.0060.3256.25  
   700x525   59.98  
   720x480   60.0059.94  
   640x512   60.02  
   640x480   60.0060.0059.94  
   512x384   60.00  
   400x300   60.3256.34  
   320x240   60.05  
VGA-1 connected 1280x1024+1920+0 (normal left inverted right x axis y axis) 
338mm x 270mm
   1280x1024 60.02*+  75.02  
   1280x960  60.00  
   1152x864  75.00  
   1024x768  60.0475.0875.0370.0760.00  
   960x720   60.00  
   928x696   75.0060.05  
   896x672   75.0560.01  
   832x624   74.55  
   800x600   75.0070.0065.0060.0072.1975.0060.32
56.25  
   700x525   74.7659.98  
   640x512   75.0260.02  
   640x480   60.0075.0072.8172.8175.0066.6760.00
59.94  
   720x400   70.08  
   576x432   75.00  
   512x384   75.0370.0760.00  
   416x312   74.66  
   400x300   72.1975.1260.3256.34  
   320x240   72.8175.0060.05  


signature.asc
Description: OpenPGP digital signature

Re: [gentoo-user] Getting X11 to "underscan"...

[Daniel Frey]

On 10/17/2016 07:48 PM, Jigme Datse Yli-RAsku wrote:
> So far after much digging on the TV I haven't found a way to actually get it 
> to do what I want.  I'm not sure if it even can.  I will look when I next get 
> access to the system (currently in use by other members of the household).  
> Perhaps somewhere we have a manual for it?  I really don't know. 
> 
> I agree, that it would be preferable to not have to make the computer fudge 
> it, but if after having spent time trying to fix it on the TV itself multiple 
> times, only to find that all options I have found, end up producing very 
> undesirable results (such as displaying it a 4:3 aspect ratio, or a 2:1 
> aspect ratio).  I'll see if I can find what I need. 
> 
> I do know that if I could get the TV to change the setting for that so it 
> doesn't end up overscanning, without doing other "weird" stuff, it would mean 
> that I could see the full boot process, not missing bits of it off the edge 
> of the screen.
> 
> Jigme Datse Yli-Rasku
> 
> On 2016-10-17 16:47, Daniel Frey wrote:
>> On 10/17/2016 04:41 PM, Jigme Datse Yli-RAsku wrote:
>>> When I connect the iMac to our HDTV TV, I can set it to underscan.  The
>>> reason that I would like to do that is because when I display at 1080p
>>> the TV ends up dropping the edges of the image off of the screen.  This
>>> isn't really a problem at all for TV, or movies or whatever displayed
>>> there, but if KDE displays the standard panel on the top or bottom, only
>>> a thin line of pixels shows where it is supposed to be (don't know about
>>> left or right as I haven't used them).  This also ends up being an issue
>>> in MATE.  Is there a way to get it to send a 1080p signal which is
>>> postboxed in the sense that black bars are being added top, bottom,
>>> left, and right?  These black bars are "outside" the interface.
>>>
>>> Jigme Datse Yli-Rasku
>>>
>>
>> It's often far easier to set the TV to disable overscanning. Some TVs
>> it's an actual option in the menu; in others simply assigning the HDMI
>> input label as "PC" or similar will disable overscanning.
>>
>> Dan
>>
> 

I have three different manufacturers and each one has it, but on mine it
wasn't marked in the manual. Usually you just have to edit the input
labels. On my Samsung (I just looked), going to Settings->Input->Edit
Name and choosing DVI-PC as the name for HDMI1 disables overscanning.
The other TVs where similar (LG and Insignia.) You may need to set the
label to something different if the manufacturer of your TV is different.

Dan

Re: [gentoo-user] Getting X11 to "underscan"...

[Michael Mol]

On Monday, October 17, 2016 07:48:29 PM Jigme Datse Yli-RAsku wrote:
> So far after much digging on the TV I haven't found a way to actually get it
> to do what I want.  I'm not sure if it even can.  I will look when I next
> get access to the system (currently in use by other members of the
> household).  Perhaps somewhere we have a manual for it?  I really don't
> know.
> 
> I agree, that it would be preferable to not have to make the computer fudge
> it, but if after having spent time trying to fix it on the TV itself
> multiple times, only to find that all options I have found, end up
> producing very undesirable results (such as displaying it a 4:3 aspect
> ratio, or a 2:1 aspect ratio).  I'll see if I can find what I need.
> 
> I do know that if I could get the TV to change the setting for that so it
> doesn't end up overscanning, without doing other "weird" stuff, it would
> mean that I could see the full boot process, not missing bits of it off the
> edge of the screen.
> 

Once upon a time, in the days of analog displays, we used modelines to 
accomplish what you're doing.

I don't think modelines work with pure-digital outputs, though. Does your TV 
have a VGA input, and does your box have a VGA output? That would be an 
effective, if not ideal, solution.

Alternately, have you tried setting your display to an unusual resolution? 
What's the output of the xrandr command? It should give you a list of 
supported resolutions refresh rates, including flags to tell you which ones are 
selected and which ones are recommended. Often, with digital TVs, there will 
be a resolution you can use that evades the TV's overscan emulation.

-- 
:wq

signature.asc
Description: This is a digitally signed message part.

Re: [gentoo-user] Getting X11 to "underscan"...

[Jigme Datse Yli-RAsku]

So far after much digging on the TV I haven't found a way to actually get it to 
do what I want.  I'm not sure if it even can.  I will look when I next get 
access to the system (currently in use by other members of the household).  
Perhaps somewhere we have a manual for it?  I really don't know. 

I agree, that it would be preferable to not have to make the computer fudge it, 
but if after having spent time trying to fix it on the TV itself multiple 
times, only to find that all options I have found, end up producing very 
undesirable results (such as displaying it a 4:3 aspect ratio, or a 2:1 aspect 
ratio).  I'll see if I can find what I need. 

I do know that if I could get the TV to change the setting for that so it 
doesn't end up overscanning, without doing other "weird" stuff, it would mean 
that I could see the full boot process, not missing bits of it off the edge of 
the screen.

Jigme Datse Yli-Rasku

On 2016-10-17 16:47, Daniel Frey wrote:
> On 10/17/2016 04:41 PM, Jigme Datse Yli-RAsku wrote:
> > When I connect the iMac to our HDTV TV, I can set it to underscan.  The
> > reason that I would like to do that is because when I display at 1080p
> > the TV ends up dropping the edges of the image off of the screen.  This
> > isn't really a problem at all for TV, or movies or whatever displayed
> > there, but if KDE displays the standard panel on the top or bottom, only
> > a thin line of pixels shows where it is supposed to be (don't know about
> > left or right as I haven't used them).  This also ends up being an issue
> > in MATE.  Is there a way to get it to send a 1080p signal which is
> > postboxed in the sense that black bars are being added top, bottom,
> > left, and right?  These black bars are "outside" the interface.
> >
> > Jigme Datse Yli-Rasku
> >
>
> It's often far easier to set the TV to disable overscanning. Some TVs
> it's an actual option in the menu; in others simply assigning the HDMI
> input label as "PC" or similar will disable overscanning.
>
> Dan
>

-- 
Jigme Datse Yli-Rasku
jigme.da...@datsemultimedia.com (Preferred address for new messages)
250-505-6117

Jigme Datse Yli-Rasku
PO Box 270
Rossland, BC V0G 1Y0
Canada

...
... This message should be electronically signed, and if the sender ...
... has your public key, may also be encrypted. ...
... If you have any questions about this, please email, or call. ...
... ...
... Note, unknown calls likely will go to voicemail. ...
... Please leave a message if you get voicemail. ...
...

Re: [gentoo-user] Getting X11 to "underscan"...

[Daniel Frey]

On 10/17/2016 04:41 PM, Jigme Datse Yli-RAsku wrote:
> When I connect the iMac to our HDTV TV, I can set it to underscan.  The
> reason that I would like to do that is because when I display at 1080p
> the TV ends up dropping the edges of the image off of the screen.  This
> isn't really a problem at all for TV, or movies or whatever displayed
> there, but if KDE displays the standard panel on the top or bottom, only
> a thin line of pixels shows where it is supposed to be (don't know about
> left or right as I haven't used them).  This also ends up being an issue
> in MATE.  Is there a way to get it to send a 1080p signal which is
> postboxed in the sense that black bars are being added top, bottom,
> left, and right?  These black bars are "outside" the interface.
> 
> Jigme Datse Yli-Rasku
> 

It's often far easier to set the TV to disable overscanning. Some TVs
it's an actual option in the menu; in others simply assigning the HDMI
input label as "PC" or similar will disable overscanning.

Dan