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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - black screen with "drm/amd/display: Do not limit color depth to 8bpc" e03fd3f300f6184c1264186a4c815e93bf658abb >=4.18"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108693">108693</a>
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<th>Summary</th>
<td>black screen with "drm/amd/display: Do not limit color depth to 8bpc" e03fd3f300f6184c1264186a4c815e93bf658abb >=4.18
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>XOrg git
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>major
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>DRM/AMDgpu
</td>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>andrey.arapov@nixaid.com
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<pre>Hello,
some of the MacBookPro 14,3 users have been struggling with the black screen
issue on their systems, I have been bisecting the kernel commits that came to
v4.18-rc1 and found that the problem is gone when I revert this commit
"drm/amd/display: Do not limit color depth to 8bpc"
e03fd3f300f6184c1264186a4c815e93bf658abb
I presume that the driver cannot get the display_info.bpc from the screen so it
defaults to COLOR_DEPTH_UNDEFINED causing the black screen.
Please let me know,
<a href="https://github.com/torvalds/linux/commit/e03fd3f300f6184c1264186a4c815e93bf658abb">https://github.com/torvalds/linux/commit/e03fd3f300f6184c1264186a4c815e93bf658abb</a>
Followed-by
<a href="https://github.com/Dunedan/mbp-2016-linux/issues/73#issuecomment-422397681">https://github.com/Dunedan/mbp-2016-linux/issues/73#issuecomment-422397681</a>
Kind Regards,
Andrey Arapov
P.S. I have been sending an email to Harry Wentland & Alex Deucher on 18 Sept.
2018, but no response followed.</pre>
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