Got some black screens, but now I realise this happens whenever I run "Xorg -config -retro" and then Ctl/C. I MUST reboot after I get this message "NOUVEAU(0): failed to destroy server context" - if I try an different mode I lose the entire display, including the text-mode console session. I guess that is a nouveau bug, but I haven't found it reported with a quick search. I'll worry about it later.
The good news is that I've significantly improved the screen image with my new modelines. The most simplistic: Modeline "2048x1152_60.00" 197.97 2048 2184 2408 2768 1152 1153 1156 1192 -HSync +Vsync ... gives me perfect automatic vertical alignment. The image aligns against the right margin perfectly (it always has), but now the left black margin is about 5 mm (it was more than 20 mm with the EDID modes). I am confused by the sync polarity. It doesn't seem to matter that I used the gtf mode with H-/V+, even though the spec says I should use H+/V-. When I did another test with the 59.9 Hz mode, I actually coded the sync polarity as H+/V-, but there was no significant difference in appearance. -- Invalid EDID for Dell SP2309W in VGA mode https://bugs.launchpad.net/bugs/563774 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs