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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
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<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - 3840x2160 HDMI 30Hz fails on XFX r7-240a-clh4 and r7-250a-lzh4"
href="https://bugs.freedesktop.org/show_bug.cgi?id=75223">75223</a>
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</tr>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>3840x2160 HDMI 30Hz fails on XFX r7-240a-clh4 and r7-250a-lzh4
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Reporter</th>
<td>adam_richter2004@yahoo.com
</td>
</tr>
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<th>Hardware</th>
<td>x86 (IA32)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg CVS
</td>
</tr>
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<th>Component</th>
<td>DRM/Radeon
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<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=94377" name="attach_94377" title="tar file containing /var/log/Xorg.0.log and logs of dmesg, xrandr, xrandr --verbose for both cards (r7-240 and r7-250)">attachment 94377</a> <a href="attachment.cgi?id=94377&action=edit" title="tar file containing /var/log/Xorg.0.log and logs of dmesg, xrandr, xrandr --verbose for both cards (r7-240 and r7-250)">[details]</a></span>
tar file containing /var/log/Xorg.0.log and logs of dmesg, xrandr, xrandr
--verbose for both cards (r7-240 and r7-250)
The XFX Radeon r7-240a-clh4 and XFX Radeon r7-250a-zlh4 video cards do not seem
to be able to generate 3840x2160 @ 30 Hz video modes over HDMI, even though I
believe their hardware is supposed to be capable of this (~299 MHz pixel
clock).
At least with my se39uy04 39" Seiki television, the Radeon X.org driver happily
passed through the five 3840x2160 @ 24-30 Hz that the television's advertises
in its EDID modes to xrandr, meaning that driver thinks it can support those
video modes, but, if I select any of them, the telvision just says "mode not
support." In comparison, if I make a custom video mode for 3840x2160 @ 15Hz,
the 4k TV displays that fine.
I am attaching a .tar.gz file containting /var/log/Xorg.0.log and logs of
dmesg, xrandr, xrandr --verbose for both cards (r7-240 and r7-250).
Thanks to Alex Deucher for advising me to file this bug report here.
Thanks in advance for any further processing of this bug report.</pre>
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