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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [VLV bisected] LVDS/powerdomains: Screen goes blank on rotate using xrandr"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84974#c26">Comment # 26</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [VLV bisected] LVDS/powerdomains: Screen goes blank on rotate using xrandr"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84974">bug 84974</a>
from <span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span></b>
<pre>Presuming the log from <a href="show_bug.cgi?id=84974#c22">comment #22</a> is with just the eDP->LVDS output, the VBT
on the thing doesn't indicate that port C is eDP. What if you try this hack
patch:
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 6421593d95de..e5ab5f2ee879 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4527,7 +4527,7 @@ bool intel_dp_is_edp(struct drm_device *dev, enum port
port)
[PORT_D] = PORT_IDPD,
};
- if (port == PORT_A)
+ if (port == PORT_C)
return true;
if (!dev_priv->vbt.child_dev_num)</pre>
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