[Bug 67030] [HSW] native mode 3840x2160 not supported on 4K TV with HDMI

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67030

--- Comment #21 from cancan,feng <cancan.feng at intel.com> ---
(In reply to comment #19)
> Can you please try what happens when you manually add the mode:
> 
> $ xrandr --newmode "3840x2160_60.00"  712.34  3840 4152 4576 5312  2160 2161
> 2164 2235  -HSync +Vsync
> $ xrandr --addmode HDMI2 "3840x2160_60.00"
> $ xrandr --output HDMI2 --mode "3840x2160_60.00"
> 
> You need to test this with the patch v3 otherwise the kernel will reject the
> mode when you try to use it.

[root at x-hsw24 ~]# xrandr --newmode "3840x2160_60.00"  712.34  3840 4152 4576
5312  2160 2161 2164 2235  -HSync +Vsync
[root at x-hsw24 ~]# xrandr --addmode HDMI2 "3840x2160_60.00"
[root at x-hsw24 ~]# xrandr --output HDMI2 --mode "3840x2160_60.00"
xrandr: Configure crtc 0 failed
[root at x-hsw24 ~]#

This mode doesn't work out, it will give warning like "xrandr: Configure crtc 0
failed".

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