Ideally use DisplayPort if you can, because it has supported higher
resolutions and higher bandwidth than HDMI for a long time already.
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https://bugs.launchpad.net/bugs/1901470
Title:
[
Also note that 3K/4K-wide at 60Hz requires an HDMI 2.0 port and cable,
or for you to limit your refresh rate to 30Hz (not recommended for
desktop usage) for HDMI v1.4:
https://en.wikipedia.org/wiki/HDMI#Refresh_frequency_limits_for_standard_video
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It looks like this issue keeps happening with HDMI for i915 users. Maybe
Intel is being conservative (or just accurate) with bandwidth
limitations... Anyone affected, please follow the instructions in
comment #34.
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Bugs, whic
Comment #29 shows this problem is originating in the i915 kernel driver.
So there's no need to include 'xorg-server' here, Xorg is only following
the (incomplete) list of modes exposed by the kernel.
** No longer affects: xorg-server (Ubuntu)
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