[Bug 90128] Big monitor has blank display (HDMI or DVI) in any kernel since and including 3.13 (despite earlier fixes)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90128

--- Comment #16 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to philipmorant from comment #14)
> Created attachment 130590 [details]
> dmesg
> 
> Trying manual xrandr:
> 
> xrandr --newmode "2560x1440_60.00"  312.25  2560 2752 3024 3488  1440 1443
> 1448 1493 -hsync +vsync
> xrandr --addmode HDMI1  2560x1440_60.00
> 
> screen goes blank.  gnome is treating it as switched off.

HSW doesn't support > 300 MHz clock with HDMI
[  160.088402] [drm:intel_hdmi_compute_config [i915]] unsupported HDMI clock,
rejecting mode

The only mode the EDID shows is:
xrandr --newmode "2560x1440" 241.5 2560 2608 2640 2720 1440 1443 1448 1481
+hsync -vsync

And the mode used by the BIOS would be:
xrandr --newmode "1024x768" 65.0 1024 1048 1184 1344 768 771 777 806 -hsync
-vsync

Can you try either of those?

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