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Detect Monitor Resolution in Windows 7 'not tworking' the way I wantit to for monitor resolutions
I bought a cheap new LCD 15" monitor and find that my mid-priced Radeon graphics card (ATI Radeon HD 4600 series) only suggests (and will not allow me to change) a screen resolution of 1024x768, despite the fact the Radeon card recognizes the monitor can in theory can support 1920x1080 at 72 Hz.
Playing around with the ATI Catalyst Control center program, including the Display Detect Option ('use manual detect only' as per this thread: http://superuser.com/questions/96683...n-in-windows-7) and clicking on and off the "EDID" Extended Display Identification Device checkbox, was of no use, as the OS will not allow me to pick a higher resolution than 1024x768. I suspect it's a feature rather than the bug it really seems to be, to prevent people from picking the wrong resolution. It's not a bad idea I suppose, and 1024x768 is good for only a small 15" screen. RL |
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Detect Monitor Resolution in Windows 7 'not tworking' the wayI want it to for monitor resolutions
RayLopez99 wrote:
I bought a cheap new LCD 15" monitor and find that my mid-priced Radeon graphics card (ATI Radeon HD 4600 series) only suggests (and will not allow me to change) a screen resolution of 1024x768, despite the fact the Radeon card recognizes the monitor can in theory can support 1920x1080 at 72 Hz. Playing around with the ATI Catalyst Control center program, including the Display Detect Option ('use manual detect only' as per this thread: http://superuser.com/questions/96683...n-in-windows-7) and clicking on and off the "EDID" Extended Display Identification Device checkbox, was of no use, as the OS will not allow me to pick a higher resolution than 1024x768. I suspect it's a feature rather than the bug it really seems to be, to prevent people from picking the wrong resolution. It's not a bad idea I suppose, and 1024x768 is good for only a small 15" screen. RL Use Moninfo. Look for a "real-time" entry in the upper left, click it, and see if there is actually data present. Chances are, something is wrong with EDID serial connections, or the chip wasn't programmed, or it got overwritten. Moninfo is free. http://www.entechtaiwan.com/util/moninfo.shtm ******* On display devices lacking EDID (projectors), you can add an "EDID box" in line with the video connection, to present a "fake EDID" to the computer. So that can be used to compensate for poorly implemented equipment. http://www.gefen.com/kvm/ext-hdmi-ed...p?prod_id=8005 http://www.gefen.com/kvm/dproduct.jsp?prod_id=1378 Cheap ones available. http://www.amazon.com/ConnectPRO-VGA.../dp/B0032F9D0S As an example, my old Sony Trinitron, was connected via five coax cables (RGBHV). Meaning, there was no chance of EDID or anything else. That box, were it alive today, would be a candidate for an EDID faker. The monitor was multisync, and originally ran at 1280x1024 and later in life 1152x864. And if I faked the EDID, it would have been relatively simple to set up on a modern system. On the Macintosh that was connected to, there was yet another kind of dongle sending fake resolution info (programmed via DIP switches). So sending fake res info is a common theme on computers. ******* On Windows 8, the resolution just happens to "stick" at 1024x768 - that is, if there is no video driver available. I had that happen on the computer here, that has a FX5200 with no video driver. You can't change the resolution on that. And the Preview version of Windows 8, is the only Win8 the box will ever see. ******* And yes, the reasoning about resolution selection, has to do with the history of monitor damage from running settings which are too high. Just about any display device you buy now, is protected against that, and there is hardware present to detect "out of bounds" conditions. The OSD then displays the fact you've attempted to run the monitor at too high a setting. But on older monitors, having an EDID, or not detecting an EDID, caused the video driver to take it easy on the monitor. Paul |
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