[Bug 101168] [i915][SKL] Kernel ignoring custom modeline - cannot set monitors full resolution

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101168

Ville Syrjala <ville.syrjala at linux.intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #9 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
The modelines you're trying to use exceed the capabilities of the poor SKL.

[   16.182265] [drm:intel_hdmi_compute_config [i915]] unsupported HDMI clock,
rejecting mode
[   16.182532] [drm:drm_mode_debug_printmodeline [drm]] Modeline 0:"" 0 312250
2560 2752 3024 3488 1440 1443 1448 1493 0x0 0x6

The maximum dotclock you can use is 300 MHz, whereas this mode is ~312 MHz.

You should try the mode that the display reports in its EDID:
241.5 2560 2608 2640 2720 1440 1443 1448 1481 +hsync -vsync

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