Can anyone suggest how to debug and lock my monitor configuration? I've recently bought a great AOC Q3279VWFD8 monitor to work from home (no prizes for guessing why), which can be driven at 2580x1440 @75Hz via DisplayPort from onboard Intel graphics (Core i5-2500K) with an H67M-GE/HT motherboard. Most time the monitor sleeps it wakes up at a lower resolution (typically 1920x1080, but 1024x768 for extra annoyance). Occasionally I can reconfigure it back up with System Settings -> Display & Monitor. Often I have to repeatedly trick it by powering the monitor off and on, and sometimes it can then be stepped back up to 2580x1440. Often it gets stuck at something like 1920x1080 @ 30Hz. Options are restarting Plasma or letting it go to sleep and reconfigure (not guaranteed). Looking in the journal I can find references to: kdeinit5[6968]: kscreen: Requesting missing EDID for outputs (66, 70) org_kde_powerdevil[7047]: kscreen: Requesting missing EDID for outputs (66, 70) systemsettings5[5381]: kscreen: Requesting missing EDID for outputs (66, 70) As an aside, I have a second monitor 1920x1080 to the right, via HDMI. According to the manual my motherboard will only support two outputs (of the four). The second monitor is only needed a few times a week when puzzling over accounts/spreadsheets. I've read around and the various conflicting advice and trails for multi-monitor & Plasma issues go back years. I'm at a bit of a loss to know which bit of behind the scenes magic is going wrong, as I haven't had to concern myself with this kind of setup since the CRT days! I suspect the monitor isn't replying in time with its capabilities. Here's the xrandr output (listing modes) from it working nicely: $ xrandr Screen 0: minimum 320 x 200, current 4664 x 1588, maximum 8192 x 8192 VGA-1 disconnected (normal left inverted right x axis y axis) HDMI-1 connected 1920x1080+2744+508 (normal left inverted right x axis y axis) 598mm x 336mm 1920x1080 60.00*+ 1680x1050 59.88 1280x1024 75.02 60.02 1440x900 59.90 1280x960 60.00 1280x800 59.91 1152x864 75.00 1280x720 60.00 1024x768 75.03 70.07 60.00 832x624 74.55 800x600 72.19 75.00 60.32 56.25 640x480 75.00 72.81 66.67 59.94 720x400 70.08 DP-1 disconnected (normal left inverted right x axis y axis) HDMI-2 disconnected (normal left inverted right x axis y axis) HDMI-3 disconnected (normal left inverted right x axis y axis) DP-2 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 725mm x 428mm 2560x1440 59.95 + 74.97* 1920x1080 60.00 60.00 50.00 59.94 1920x1080i 60.00 50.00 59.94 1280x1440 59.91 1680x1050 59.95 1280x1024 75.02 60.02 1440x900 59.89 1280x960 60.00 1280x720 60.00 60.00 50.00 59.94 1024x768 75.03 70.07 60.00 832x624 74.55 800x600 72.19 75.00 60.32 56.25 720x576 50.00 50.00 50.00 720x480 60.00 60.00 59.94 59.94 59.94 640x480 75.00 72.81 66.67 60.00 59.94 59.94 720x400 70.08 2560x1440_74.97 74.89 DP-3 disconnected (normal left inverted right x axis y axis) And here's xrandr output when not working nicely: $ xrandr Screen 0: minimum 320 x 200, current 4664 x 1588, maximum 8192 x 8192 VGA-1 disconnected (normal left inverted right x axis y axis) HDMI-1 connected 1920x1080+2744+508 (normal left inverted right x axis y axis) 598mm x 336mm 1920x1080 60.00*+ 1680x1050 59.88 1280x1024 75.02 60.02 1440x900 59.90 1280x960 60.00 1280x800 59.91 1152x864 75.00 1280x720 60.00 1024x768 75.03 70.07 60.00 832x624 74.55 800x600 72.19 75.00 60.32 56.25 640x480 75.00 72.81 66.67 59.94 720x400 70.08 DP-1 disconnected (normal left inverted right x axis y axis) HDMI-2 disconnected (normal left inverted right x axis y axis) HDMI-3 disconnected (normal left inverted right x axis y axis) DP-2 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 725mm x 428mm 1920x1080 60.00* 60.00 50.00 59.94 1920x1080i 60.00 50.00 59.94 1280x1440 59.91 1680x1050 59.95 1280x1024 75.02 60.02 1440x900 59.89 1280x960 60.00 1280x720 60.00 60.00 50.00 59.94 1024x768 75.03 70.07 60.00 832x624 74.55 800x600 72.19 75.00 60.32 56.25 720x576 50.00 50.00 50.00 720x480 60.00 60.00 59.94 59.94 59.94 640x480 75.00 72.81 66.67 60.00 59.94 59.94 720x400 70.08 DP-3 disconnected (normal left inverted right x axis y axis) Between it being bad I tried the following (having created a modeline from cvt when it was previously good - and modelines seem odd in the days of panels/non-CRT, but I haven't been paying attention): $ xrandr --newmode "2560x1440_74.97" 397.00 2560 2760 3040 3520 1440 1443 1448 1506 -hsync +vsync $ xrandr --addmode DP-2 2560x1440_74.97 $ xrandr --output DP-2 --mode 2560x1440_74.97 xrandr: Configure crtc 0 failed # put up with it to do some critical email # made a coffee & swapped a 3D print # powered monitor up and reset several times # switched on second monitor # mashed the keyboard/wiggled mouse/switched off and on again # jumped to VT1 and got prompt mirrored on both monitors # reconfigured successfully with System Settings -> Display & Monitor I'm expecting at least another 10 weeks of working from home, and this is getting really irritating. Help! Ta. Daniel -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org