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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [NVAA] Xorg on HDMI regression since v4.0-rc1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90424">90424</a>
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<th>Summary</th>
<td>[NVAA] Xorg on HDMI regression since v4.0-rc1
</td>
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<th>Product</th>
<td>xorg
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Driver/nouveau
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<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
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<th>Reporter</th>
<td>alexanders83@web.de
</td>
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
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<p>
<div>
<pre>While trying to fix another bug I tried using kernel v4.0 and noticed that
after X.org has started (running fluxbox with mythtv in my case) the screen
stays black. My screen is attached on HDMI.
During boot I can see the console output just fine but when X started it stays
black. I don't even see the first small X shaped cursor.
I bisected this back to commit 0ea5fe8a83c2 ("drm/nouveau/kms: default to panel
scaling, except for fixed panels prior to nv50").
>From the commit message I suspect that "panel scaling" (whatever that means)
does not work on my NVAA. I check the values of nv_connector->type and
nv_connector->scaling_mode on both the bisected commit and the parent (last
commit working).
The type is 0x61 (DCB_CONNECTOR_HDMI_1) in both cases and the scaling_mode is 0
(DRM_MODE_SCALE_NONE) when the screen stays black while it is 1
(DRM_MODE_SCALE_FULLSCREEN) when everything works normally.
dmesg doesn't show anything interesting though. Maybe a higher log level,
please give me some hints which component and which debug level you may need.</pre>
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