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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [GLK DSI] Black screen after grub - Ubuntu 18.04 - kernel latest tip 21.11.2018"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108826#c59">Comment # 59</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [GLK DSI] Black screen after grub - Ubuntu 18.04 - kernel latest tip 21.11.2018"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108826">bug 108826</a>
from <span class="vcard"><a class="email" href="mailto:stanislav.lisovskiy@intel.com" title="Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>"> <span class="fn">Stanislav Lisovskiy</span></a>
</span></b>
<pre>(In reply to Miroslaw from <a href="show_bug.cgi?id=108826#c58">comment #58</a>)
<span class="quote">> I tested newest tip kernel and 5.0rc4 - black screen ...
> vbt 915 logs I will attach later today .</span >
It was with PINCTRL_GEMINILAKE=y I suppose?
If so, can you try to patch intel_dsi_vbt with this patch:
diff --git a/drivers/gpu/drm/i915/intel_dsi_vbt.c
b/drivers/gpu/drm/i915/intel_dsi_vbt.c
index 06a11c35a784..9b3c68a2f75c 100644
--- a/drivers/gpu/drm/i915/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_vbt.c
@@ -371,7 +371,7 @@ static const u8 *mipi_exec_gpio(struct intel_dsi
*intel_dsi, const u8 *data)
vlv_exec_gpio(dev_priv, gpio_source, gpio_number, value);
else if (IS_CHERRYVIEW(dev_priv))
chv_exec_gpio(dev_priv, gpio_source, gpio_number, value);
- else
+ else if (!IS_GEMINILAKE(dev_priv))
bxt_exec_gpio(dev_priv, gpio_source, gpio_index, value);
return data;
---
With this patch from Jani, I can boot into Ubuntu desktop and
PINCTRL_GEMINILAKE is turned on. However... touchscreen still doesn't work.</pre>
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