In order to help someone out in a web forum, and because I'd never before tried a 3-head setup, I tried to duplicate his setup here, using the DVI out on ATI in PCIe1 and both DVI and VGA out on NVidia in PCIe2. In the process of trying with 13.2, 42.1, Jessie and Stretch, I encountered many obstacles, trying with radeon and nouveau, and with modesetting. e.g. in 42.1 with XFCE, xrandr --listproviders shows both the ATI (normally) and the NVidia (nameless), but in xrandr -q, only the ATI shows up (same as in the Debians). The only place where I got each head to display a discreet section of desktop and without producing a hopelessly out of range logical display density, was in two different installations of TW, one with Plasma (with kscreen autostart disabled) and one with KDE3. In both, mouse response is terrible, but gets worse when the pointer is supposed to cross a CRTC boundary. Doing that causes a delay long enough to make one think the PC is locked up entirely, responding neither to further mouse movement or keyboard input sometimes longer than a minute. With top loaded in Konsole, I see Xorg using much too much CPU. To produce the desired arrangement of screens, I use /etc/X11/xinit/xinitrc.d/setup. For use with modesetting driver it contains the following: xrandr --output DVI-I-2 --mode 1600x1200 --right-of DVI-I-1 --output VGA-2 --mode 1600x1200 --right-of DVI-I-2 --output DVI-I-1 --primary --mode 1680x1050 xrandr --fbmm 1033x254 Moving fbmm to first line or same line as the rest produces a nonsense resolution (and makes everything microscopic: only with magnification is text intelligible): # xdpyinfo | egrep 'dimen|resol' dimensions: 4880x1200 pixels (0x0 millimeters) resolution: -2147483648x-2147483648 dots per inch Log: http://fm.no-ip.com/Tmp/Linux/Xorg/xorg.0.log-2016081614xx-email.txt Any suggestions about getting mouse to behave normally? -- "The wise are known for their understanding, and pleasant words are persuasive." Proverbs 16:21 (New Living Translation) Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata *** http://fm.no-ip.com/ -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org