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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [HSW] native mode 3840x2160 not supported on 4K TV with HDMI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=67030#c21">Comment # 21</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [HSW] native mode 3840x2160 not supported on 4K TV with HDMI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=67030">bug 67030</a>
from <span class="vcard"><a class="email" href="mailto:cancan.feng@intel.com" title="cancan,feng <cancan.feng@intel.com>"> <span class="fn">cancan,feng</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=67030#c19">comment #19</a>)
<span class="quote">> 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.</span >
[root@x-hsw24 ~]# xrandr --newmode "3840x2160_60.00" 712.34 3840 4152 4576
5312 2160 2161 2164 2235 -HSync +Vsync
[root@x-hsw24 ~]# xrandr --addmode HDMI2 "3840x2160_60.00"
[root@x-hsw24 ~]# xrandr --output HDMI2 --mode "3840x2160_60.00"
xrandr: Configure crtc 0 failed
[root@x-hsw24 ~]#
This mode doesn't work out, it will give warning like "xrandr: Configure crtc 0
failed".</pre>
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