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>> ... |
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>> But at some point the 1s and 0s must be converted to some sort of an |
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>> analog signal if only right behind the diode. A diode must be |
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>> presented with a signal in some sort of analog form in order to |
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>> illuminate, right? Digital is just a figment of our imagination after |
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>> all. |
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> |
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> The pixel is either on or off. There's no way to make half of the adjacent pixel on (and the other half of that pixel off). |
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Well, couldn't the digital information for a particular pixel mean |
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blue, and the D/A mechanism attempts to create an analog signal that |
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the diode would interpret as blue, but the D/A converter or the analog |
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signal or the analog diode is affected by electric interference (which |
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traveled from the computer to the TV along the HDMI cable) and the |
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diode illuminates light blue instead of blue? |
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|
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> Having said that, you may be on the right track. I hadn't looked at your photo before, so sorry for that, but it indeed looks like your telly may be doing some scaling on the image. |
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> |
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> Check for overscan / underscan settings in the TV's menus and on the remote. The button for overscan may not be at all obvious on the remote from the icon that labels it - if you can't find a button on the remote that resolves this issue, or a overscan setting in the TV's menus then check the manual. |
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> |
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> Overscan would cause this symptom, and it is such a common feature, that IMO you shouldn't pst back here again until you've identified it on your TV and checked it. |
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You may be right about this. I can select the following aspect ratios |
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on my TV's menu: |
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|
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16:9 (this causes all 4 edges of the screen to be cut off) |
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Just Scan (this is what I use and it fits perfectly on the screen) |
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Set By Program (same as 16:9) |
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4:3 (same as 16:9 except with black boxes on the left and right) |
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Zoom (same as 16:9 except more of the image is cut off) |
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Cinema Zoom 1 (same as Zoom except nothing is cut off from the top of the image) |
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I set 1920x1080 in xorg.conf but I just tried defining no resolution |
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at all and it seems to have been set anyway: |
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|
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(II) RADEON(0): Output HDMI-0 using initial mode 1920x1080 |
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The TV is an LG 47LH90 and and it is said to do 1080p. I looked for |
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ghosting in 16:9 mode instead of Just Scan mode and strangely the |
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shadows are there, but they're oriented top and bottom instead of left |
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and right. I can take another photo if anyone would like to see. |
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Why do I need to select Just Scan in order to prevent all 4 edges of |
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the screen from being cut off? |
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|
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- Grant |
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