I spent a good chunk of hours at work earlier today trying to get a two-monitor setup working. It actually does work, except the resolution is wrong.
These are a pair of 30" Dell monitors, 2560x1600. Specs say 101 PPI. Everything as far as the desktop works, I can drag windows from one to display to the other, etc. but the horizontal resolution seems out of whack. Everything looks very pixelated, and as I move windows horizontally pixels "drop out" and reappear. I have a basic /etc/X11/xorg.conf that sets up a Screen with a "Virtual" size of 5120x1600. The card is an ATI Radeon HD 4670 with two DVI connectors, and uses the radeon driver. (I am using dual-link DVI cables on each monitor). xrandr -q reports: Screen 0: minimum 320 x 200, current 5120 x 1600, maximum 5120 x 1600 DVI-0 connected 2560x1600+0+0 (normal left inverted right x axis y axis) 641mm x 401mm DVI-1 connected 2560x1600+2560+0 (normal left inverted right x axis y axis) 641mm x 400mm xdpyinfo reports: dimensions: 5120x1600 pixels (1354x423 millimeters) resolution: 96x96 dots per inch ...so that all looks OK, I think. The size reported by xdpyinfo is a bit off, should actually be 1282mm x 400mm if you look at the sizes reported by the individual monitors, above. The difference appears to be either caused by or resulting in the 96x96 DPI resolution, when the monitor is actually 101 DPI. But in the xorg.0.log I see.... [ 5698.647] (II) RADEON(0): Output DVI-0 connected [ 5698.647] (II) RADEON(0): Output DVI-1 connected [ 5698.647] (II) RADEON(0): Using user preference for initial modes [ 5698.647] (II) RADEON(0): Output DVI-0 using initial mode 2560x1600 [ 5698.647] (II) RADEON(0): Output DVI-1 using initial mode 2560x1600 [ 5698.647] (II) RADEON(0): Using default gamma of (1.0, 1.0, 1.0) unless otherwise stated. [ 5698.647] (**) RADEON(0): Display dimensions: (640, 400) mm [ 5698.647] (**) RADEON(0): DPI set to (203, 101) That last line... has the horizontal DPI at twice what it should be. I am guessing that is causing my problem. But I really am not sure. Anyone know enough to say if I'm on the right track, at least? If so how do I fix it? Allan -- Allan Streib _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
