[Bug 106959] kernel 4.18rc1 amdgpu can't 4k60hz over HDMI

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Jun 21 07:24:29 UTC 2018


--- Comment #15 from Ă–yvind Saether <oyvinds at everdot.org> ---
Created attachment 140256
  --> https://bugs.freedesktop.org/attachment.cgi?id=140256&action=edit
dmesg after booting with drm.debug=0x04 log_buf_len=5M and switching to 24hz
then back to 60hz with kernel that can do 60hz 60hz 60hz

this is with kernel that does 60hz on HDMI, it's boot then switched to 24hz
with xfce4-display-manager and then switch back to 60Hz. didn't unplug the
monitor, didn't think it would differ (could do that if it's helpful)

sent some other dmesg output files too per e-mail. let me know if this wasn't
the right information required. Also, I have a RX560 connected to a 1440p via
DP, I could connect a 4K monitor to that box and see what happens if it's
somehow helpful (probably acts the same way?).

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