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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED NOTABUG - amdgpu cannot set 2560x1440@60 mode even though monitor,gpu and motherboard support it"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105534#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED NOTABUG - amdgpu cannot set 2560x1440@60 mode even though monitor,gpu and motherboard support it"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105534">bug 105534</a>
from <span class="vcard"><a class="email" href="mailto:philipmorant@gmail.com" title="philipmorant@gmail.com">philipmorant@gmail.com</a>
</span></b>
<pre>There are 3 physical motherboard sockets: HDMI, DVI DL, and D-SUB.
xrandr reports the D-SUB as DisplayPort-0.
In kernel versions before 4.10 I used to have to hack the i915 code as follows
(in intel_hdmi.c):
@@ -849,7 +849,7 @@ static int hdmi_portclock_limit(struct intel_hdmi *hdmi,
bool respect_dvi_limit)
{
struct drm_device *dev = intel_hdmi_to_dev(hdmi);
- if ((respect_dvi_limit && !hdmi->has_hdmi_sink) || IS_G4X(dev))
+ if (IS_G4X(dev))
return 165000;
else if (IS_HASWELL(dev) || INTEL_INFO(dev)->gen >= 8)
return 300000;
After 4.10 came out the hack became unnecessary.</pre>
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