Trying to set up dual monitors (to DUPLICATE the desktop display, not extend) with a 19" LCD monitor (native resolution is 1440 x 900) and a 26" LCD TV (native resolution is 1377 x 768, but it does 720p and 1080p) and the TV display is stretched just enough to notice. Graphics card is an ATI Radeon HD 6450. Connection types:
LCD TV monitor HDMI-input, graphics card HDMI-output.
LCD computer monitor HDMI input, graphics card DVI output
Connected in this way I get excellent text on the computer screen with a slightly degraded quality for text on the TV. Switching the cable connections degrades the computer monitor text quality too much and does nothing to fix the slight stretching of the display on the TV.
My attempt to troubleshoot:
For the ATI Radeon HD 6450, the AMD Catalyst Control Center (CCC) has been installed. When I go to the tab called "Creating and Arranging Desktops", I can see both displays are set at 1440 x 900, and I can't change this, but this shouldn't be the place to alter the resolution for the TV anyway because it's not set as the primary display.
If I go to the tab called "My Digital Flat-Panels" > Properties, for the TV monitor I can select "Maintain Aspect Ratio," and this stops the stretching but makes black bars on the sides of the TV monitor display. The display height is correct.
If at the same tab I instead select "Scale image to full panel size, I can then use the Scaling Options of the CCC (also under "My Digital Flat-Panels" ) to get the image on the TV to fill the screen, but the proportion is again stretched just enough to notice.
I see there's a tab called "HDTV Support," but when I try to change this to create a custom HDTV format it changes both the desktop (the 19" LCD monitor) and shrinks the size of the TV display image. I don't even know if I should be fooling with settings here because the options page here says: "if your digital panel is set to 720p or 1080i standard format and portions of the image are not visible you can create a custom format," but that's not the issue.
On the TV monitor remote, when I select the HDMI source connected to the PC, I get a dialog box that says 1920 x 1080, and with an HDMI connection I'm assuming that's what I would want. There's no other adjustments for resolution or aspect ratio that can be made on the TV itself (on this TV only a VGA connection allows PC Timings and ratios to be changed. The digital connection appears to be auto-detect).
Is my only choice to "Maintain Aspect Ratio" and live with the black bars on the TV monitor? Anybody familiar with the AMD CCC know what setting might be wrong here that can alter only the TV monitor?
BTW I'm using Windows 7.
LCD TV monitor HDMI-input, graphics card HDMI-output.
LCD computer monitor HDMI input, graphics card DVI output
Connected in this way I get excellent text on the computer screen with a slightly degraded quality for text on the TV. Switching the cable connections degrades the computer monitor text quality too much and does nothing to fix the slight stretching of the display on the TV.
My attempt to troubleshoot:
For the ATI Radeon HD 6450, the AMD Catalyst Control Center (CCC) has been installed. When I go to the tab called "Creating and Arranging Desktops", I can see both displays are set at 1440 x 900, and I can't change this, but this shouldn't be the place to alter the resolution for the TV anyway because it's not set as the primary display.
If I go to the tab called "My Digital Flat-Panels" > Properties, for the TV monitor I can select "Maintain Aspect Ratio," and this stops the stretching but makes black bars on the sides of the TV monitor display. The display height is correct.
If at the same tab I instead select "Scale image to full panel size, I can then use the Scaling Options of the CCC (also under "My Digital Flat-Panels" ) to get the image on the TV to fill the screen, but the proportion is again stretched just enough to notice.
I see there's a tab called "HDTV Support," but when I try to change this to create a custom HDTV format it changes both the desktop (the 19" LCD monitor) and shrinks the size of the TV display image. I don't even know if I should be fooling with settings here because the options page here says: "if your digital panel is set to 720p or 1080i standard format and portions of the image are not visible you can create a custom format," but that's not the issue.
On the TV monitor remote, when I select the HDMI source connected to the PC, I get a dialog box that says 1920 x 1080, and with an HDMI connection I'm assuming that's what I would want. There's no other adjustments for resolution or aspect ratio that can be made on the TV itself (on this TV only a VGA connection allows PC Timings and ratios to be changed. The digital connection appears to be auto-detect).
Is my only choice to "Maintain Aspect Ratio" and live with the black bars on the TV monitor? Anybody familiar with the AMD CCC know what setting might be wrong here that can alter only the TV monitor?
BTW I'm using Windows 7.
Last edited:
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