upgrade - After upgrading to 16.10, 3840x2160 resolution not being detected - Ask Ubuntu


i have seiki 39" 4k monitor worked out of box ubuntu 14.04 , has worked every upgrade since then, until upgraded 16.10, after starts in 1920x1080.

by scanning xorg.0.log before , after upgrade, can see detect 3840 resolution through ddc, complains edid timing clock 297.00 exceeds claimed max 115mhz, fixing. older logs (from 16.04) have same line, though, worked then.

[   389.050] (ww) edid timing clock 297.00 exceeds claimed max 115mhz, fixing [   389.050] (ii) modeset(0): edid vendor "sek", prod id 0 [   389.050] (ii) modeset(0): using edid range info horizontal sync [   389.050] (ii) modeset(0): using edid range info vertical refresh [   389.050] (ii) modeset(0): printing ddc gathered modelines: [   389.050] (ii) modeset(0): modeline "3840x2160"x0.0  297.00  3840 4016 4104 4400  2160 2168 2178 2250 +hsync +vsync (67.5 khz ep) ... ( other modes omited ) [   389.050] (--) modeset(0): hdmi max tmds frequency 300000khz [   389.468] (ww) edid timing clock 297.00 exceeds claimed max 115mhz, fixing ... ( repeats same block again )

i'm using integrated video driver on intel xeon e3-1200.

by using information in xorg.0.log, found right incantations add mode correct modeline through xrandr, , can manually after boot. aware can fix adding manual configuration file (though haven't tried this). figure out how can make fix on deeper level, or @ least know why stopped working.


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