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Old 05-06-2016, 04:37 PM   #1
Pinux
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Xfce - Change resolution


Hi! I have a problem. I have xfce and my display resolution is 1920:1080 but I'm not sure the display ( monitor tv 32'') ratio is 16:9, because the image is a little bigger than the display. How can i do for adjust the resolution? thank you.
 
Old 05-06-2016, 04:41 PM   #2
Emerson
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Welcome to LQ!

What graphics card? You need to adjust overscan, not resolution.
 
Old 05-06-2016, 04:45 PM   #3
Pinux
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Welcome to LQ!

What graphics card? You need to adjust overscan, not resolution.
Intel® HD Graphics 4000
 
Old 05-06-2016, 04:47 PM   #4
Pinux
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Intel HD Graphics 4000

Last edited by Pinux; 05-06-2016 at 04:49 PM.
 
Old 05-06-2016, 04:54 PM   #5
Emerson
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You could start here. Come back if you have any questions.
 
Old 05-07-2016, 02:51 PM   #6
ondoho
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Quote:
Originally Posted by Pinux View Post
Hi! I have a problem. I have xfce and my display resolution is 1920:1080 but I'm not sure the display ( monitor tv 32'') ratio is 16:9, because the image is a little bigger than the display. How can i do for adjust the resolution? thank you.
in any case xfce should have a utility to set up monitors; maybe you have to set them up to be side-by-side, and not on top of each other.
i'm not sure; the way you describe your problem it could be different things. maybe emerson is right.
 
Old 05-07-2016, 03:00 PM   #7
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You can read why TV sets have overscan issues here.
 
Old 05-10-2016, 04:06 AM   #8
Pinux
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Thank you everybody . I'm trying to correctly set the screen. I use the xrandr command but I don't understand the meaning of the numbers after --transform option.
 
Old 05-11-2016, 01:15 AM   #9
ondoho
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man xrandr:
Code:
       --transform a,b,c,d,e,f,g,h,i
              Specifies  a  transformation matrix to apply on the output. Automatically a
              bilinear filter is selected.  The mathematical form corresponds to:
                     a b c
                     d e f
                     g h i
              The transformation is based on homogeneous coordinates. The  matrix  multi‐
              plied  by  the  coordinate vector of a pixel of the output gives the trans‐
              formed coordinate vector of a pixel in the graphic buffer.  More precisely,
              the  vector (x y) of the output pixel is extended to 3 values (x y w), with
              1 as the w coordinate and multiplied against the matrix. The  final  device
              coordinates  of  the pixel are then calculated with the so-called homogenic
              division by the transformed w coordinate.  In other words, the device coor‐
              dinates (x' y') of the transformed pixel are:
                     x' = (ax + by + c) / w'   and
                     y' = (dx + ey + f) / w'   ,
                     with  w' = (gx + hy + i)  .
              Typically,  a and e corresponds to the scaling on the X and Y axes, c and f
              corresponds to the translation on those axes, and g, h, and i  are  respec‐
              tively  0,  0  and  1.  The matrix can also be used to express more complex
              transformations such as keystone correction, or rotation.  For  a  rotation
              of an angle T, this formula can be used:
                     cos T  -sin T   0
                     sin T   cos T   0
                      0       0      1
              As a special argument, instead of passing a matrix, one can pass the string
              none, in which case the default values are used (a unit matrix without fil‐
              ter).
neither do i, sorry.

i suggest you search the web for more suitable instructions.
 
Old 05-11-2016, 05:59 AM   #10
Pinux
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Quote:
Originally Posted by ondoho View Post
man xrandr:
Code:
       --transform a,b,c,d,e,f,g,h,i
              Specifies  a  transformation matrix to apply on the output. Automatically a
              bilinear filter is selected.  The mathematical form corresponds to:
                     a b c
                     d e f
                     g h i
              The transformation is based on homogeneous coordinates. The  matrix  multi‐
              plied  by  the  coordinate vector of a pixel of the output gives the trans‐
              formed coordinate vector of a pixel in the graphic buffer.  More precisely,
              the  vector (x y) of the output pixel is extended to 3 values (x y w), with
              1 as the w coordinate and multiplied against the matrix. The  final  device
              coordinates  of  the pixel are then calculated with the so-called homogenic
              division by the transformed w coordinate.  In other words, the device coor‐
              dinates (x' y') of the transformed pixel are:
                     x' = (ax + by + c) / w'   and
                     y' = (dx + ey + f) / w'   ,
                     with  w' = (gx + hy + i)  .
              Typically,  a and e corresponds to the scaling on the X and Y axes, c and f
              corresponds to the translation on those axes, and g, h, and i  are  respec‐
              tively  0,  0  and  1.  The matrix can also be used to express more complex
              transformations such as keystone correction, or rotation.  For  a  rotation
              of an angle T, this formula can be used:
                     cos T  -sin T   0
                     sin T   cos T   0
                      0       0      1
              As a special argument, instead of passing a matrix, one can pass the string
              none, in which case the default values are used (a unit matrix without fil‐
              ter).
neither do i, sorry.

i suggest you search the web for more suitable instructions.
Yess, thank you
 
  


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