From: Jani Nikula <jani.nikula@linux.intel.com>
To: Fabian Pie <fpie@teleker.com>,
'Pierre-Louis Bossart' <pierre-louis.bossart@linux.intel.com>,
intel-gfx@lists.freedesktop.org
Subject: Re: Baytrail MIPI/DSI Black when boot with HDMI connected
Date: Fri, 28 Oct 2016 09:48:48 +0300 [thread overview]
Message-ID: <87oa25m0j3.fsf@intel.com> (raw)
In-Reply-To: <000101d230e2$bd6746d0$3835d470$@teleker.com>
On Fri, 28 Oct 2016, Fabian Pie <fpie@teleker.com> wrote:
> Hi,
> I'm testing Baytrail device with mipi/dsi display and hdmi output. When I
> boot without the hdmi connected the mipi/dsi works OK and after connecting
> the hdmi both mipi/dsi and hdmi display graphics OK.
> If I boot with the hdmi connected it's selected by the bios as the default
> display, Ubuntu only boots in hdmi and it works OK in this display but
> MIPI/DSI is black. It's listed as connected by xrandr but I can't reset in
> any way.
> I didn't find this issue in your bug list. Have you seen anything similar ?
> I'm using Ubuntu 16.10 with kernel 4.8.4
Probably the BIOS skips some DSI initialization in this case, and we
fail to bring it up. Please file a bug over at [1], include the above
description, add drm.debug=14 module parameter, attach dmesg all the way
from boot for both the working and broken cases, plus
/sys/kernel/debug/dri/0/i915_vbt.
BR,
Jani.
[1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel
--
Jani Nikula, Intel Open Source Technology Center
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next prev parent reply other threads:[~2016-10-28 6:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-28 6:15 Baytrail MIPI/DSI Black when boot with HDMI connected Fabian Pie
2016-10-28 6:48 ` Jani Nikula [this message]
2016-10-28 8:40 ` Fabian Pie
2016-10-28 12:40 ` Pierre-Louis Bossart
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