this post was submitted on 28 Dec 2023
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I was looking into this earlier to try fixing a display that was being offset on an old tv screen. The display was going off the left side of the TV, causing a black bar on the right side.
I was trying
xrandr
, and fixed it somewhat by offsetting the display back, but somehow it did not fix the right side - it seemed as if the display had went under the black bar.But yeah you can offset, stretch, skew and rotate with
xrandr
The
--rotate normal,inverted,left,right
does not work, but you can use the transform option to achieve the same effect. To create the transformation matrix you can use something like: https://angrytools.com/css-generator/transform/The final command looks like this:
xrandr --output screen-1 --transform 0.87,-0.50,960,0.50,0.87,540,0,0,1
To restore the original use (type this in first, because if you screw up you might not be able to see anything anymore):
xrandr --output screen-1 --transform 1,0,0,0,1,0,0,0,1
I tested it on x11.
Did you check the actual TV settings? Some of them let you adjust where picture is displayed iirc.
It only had two modes for the VGA source, 16:9 and 4:3. The 16:9 is the right ratio for the laptop but had the offset issue. The 4:3 makes it stretched out / squashed, but it doesn't have the offset issue.