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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [bisected] GDM Login screen doesn't show up on kernel 5.3 or later"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111966#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [bisected] GDM Login screen doesn't show up on kernel 5.3 or later"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111966">bug 111966</a>
from <span class="vcard"><a class="email" href="mailto:masami256@gmail.com" title="Masami Ichikawa <masami256@gmail.com>"> <span class="fn">Masami Ichikawa</span></a>
</span></b>
<pre>I made quick hack. following patch works fine for me on mainline kernel
5.4-rc2.
diff --git a/drivers/gpu/drm/i915/display/intel_bios.c
b/drivers/gpu/drm/i915/display/intel_bios.c
index efb39f350b19..c886dae82aa7 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -1313,6 +1313,8 @@ static void sanitize_aux_ch(struct drm_i915_private
*dev_priv,
p = get_port_by_aux_ch(dev_priv, info->alternate_aux_channel);
if (p != PORT_NONE) {
+ info = &dev_priv->vbt.ddi_port_info[p];
+
DRM_DEBUG_KMS("port %c trying to use the same AUX CH (0x%x) as
port %c, "
"disabling port %c DP support\n",
port_name(port), info->alternate_aux_channel,
@@ -1330,6 +1332,7 @@ static void sanitize_aux_ch(struct drm_i915_private
*dev_priv,
info->supports_dp = false;
info->alternate_aux_channel = 0;
}
+
}
static const u8 cnp_ddc_pin_map[] = {</pre>
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