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<body><span class="vcard"><a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> <span class="fn">Ville Syrjala</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - display corruption on GPD Pocket (Cherry Trail Atom x7-Z8750)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105834">bug 105834</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
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<td>NEEDINFO
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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - display corruption on GPD Pocket (Cherry Trail Atom x7-Z8750)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105834#c8">Comment # 8</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - display corruption on GPD Pocket (Cherry Trail Atom x7-Z8750)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105834">bug 105834</a>
from <span class="vcard"><a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> <span class="fn">Ville Syrjala</span></a>
</span></b>
<pre>Does 'xset dpms force off; xset dpms force on' fix the display as well?
The corruption apparently happens when just page flipping. That sort of rules
out straightforward bugs in the DSI enable sequence.
And the panel seems to be even the most simple type you can have:
[ 4.063972] [drm:intel_dsi_vbt_init [i915]] Mode video
[ 4.064020] [drm:intel_dsi_vbt_init [i915]] Dual link: NONE
[ 4.064093] [drm:intel_dsi_vbt_init [i915]] Pixel Format 0
It seems the DSI encoder gets confused somehow and starts sending data out of
phase. I could imagine that a FIFO underrun could perhaps lead to that outcome,
but there are none reported in the dmesg.
So unfortunately I don't have any good ideas as to the cause of the bug.</pre>
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