I have an MDD hooked up to an older IBM (T85A) LCD and I can't get it to display in anything other than 1152 X 870 @ 75Hz.
The display supports up to 1280 X 1024, and on the exact same machine, when I boot the Tiger volume, 1280 X 1024 works fine. But in Leopard, every resolution except 1152 X 870 causes the monitor to fail to synch. The basic resolutions, 640 X 480, 800 X 600, 1152 X 870 and 1280 X 1024 are available for selection. Also a few other 1152 X ? resolutions. The frequencies other than 75 Hz are grayed out. I tried it on a different display and I get the same results, so I'm pretty sure it's not a display failure. Plus there's the part where it works fine in Tiger. Even 640 X 480 and 800 X 600 fail to work (no sync) under Leopard. The video card is a stock ATI Radeon 9000. The display is connected via VGA through a DVI to VGA adapter. I tried downloading the ATI 4.5.7 drivers and installed them, but, while I can see that it added some components, it does not seem to have affected the issue. I'm pretty sure it used to work, before I had a hard drive failure (the Tiger drive, not the Leopard drive) and started the reinstallation process. Somewhere along the way I replaced the PRAM battery and zapped PRAM and I think that's when the display choices stopped working. According to the documentation, the display supports these modes: VGA: 640x350 70Hz 640x480 60, 66 (MAC), 72, 75Hz 720x400 70Hz SVGA: 800x600 56, 60, 72, 75Hz 832x624 75Hz (Apple) XGA: 1024x768 60, 70, 75 (MAC), 75Hz 1152x870 75Hz (Apple) SXGA: 1280x1024 60, 72 (HP), 75, 76Hz (Sun) So, when I choose 640 X 480 @ 75 Hz in Leopard, it ought to sync, but it doesn't. Yet it works in Tiger. It's like nothing but the default resolution in Leopard is actually working properly. Any ideas? Thank you, Jeff Walther -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list
