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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [KBL] modeset to a different refresh rate periodically results in a black screen"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101373#c22">Comment # 22</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [KBL] modeset to a different refresh rate periodically results in a black screen"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101373">bug 101373</a>
from <span class="vcard"><a class="email" href="mailto:clinton.a.taylor@intel.com" title="Clinton Taylor <clinton.a.taylor@intel.com>"> <span class="fn">Clinton Taylor</span></a>
</span></b>
<pre>Here is a experimental patch that raises the HDMI voltage by ~200 mV. This may
help with signal integrity across the 2 hdmi cables between the motherboard and
the Denon if that is the issue.
diff --git a/drivers/gpu/drm/i915/intel_ddi.c
b/drivers/gpu/drm/i915/intel_ddi.c
index 0914ad9..cc1dfd7 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -460,7 +460,7 @@ static int intel_ddi_hdmi_level(struct drm_i915_private
*dev_priv, enum port por
if (IS_GEN9_BC(dev_priv)) {
skl_get_buf_trans_hdmi(dev_priv, &n_hdmi_entries);
- hdmi_default_entry = 8;
+ hdmi_default_entry = 9;
} else if (IS_BROADWELL(dev_priv)) {
n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
hdmi_default_entry = 7;</pre>
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