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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - radeon 0000:05:00.0: Invalid ROM contents (Radeon HD7750 no Monitors connected)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=75491">75491</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>radeon 0000:05:00.0: Invalid ROM contents (Radeon HD7750 no Monitors connected)
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>freedesktop@donewell.de
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Radeon
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=94711" name="attach_94711" title="bios_dump">attachment 94711</a> <a href="attachment.cgi?id=94711&action=edit" title="bios_dump">[details]</a></span>
bios_dump
I've bought a radeon HD 7750 with 4 mini-DP Connectors and use passive hdmi
adapters to connect my 3 Monitors.
kernel version is 3.13.5
on bootup kernel reports:
Feb 25 10:42:32 barfoos24 kernel: radeon 0000:05:00.0: Invalid ROM contents
Feb 25 10:42:32 barfoos24 kernel: ATOM BIOS: C44501
After init of drm the montiors goto black.
After reading a lot i managed to get them working by following kernel params:
radeon.modeset=1 radeon.dpm=1 video=DP-1:1920x1200-24@60D
video=DP-2:1920x1200-24@60D video=DP-3:1920x1200-24@60D
rm_kms_helper.edid_firmware=edid/1920x1200.bin
edid/1920x1200.bin is self compiled edid.
i've attached the dumped bios.
in this configuration the card is working with all 3 monitors, but after
screenlog or a console change the screens remain dark.
the kernel log reads:
Feb 25 10:44:01 barfoos24 kernel: [drm:radeon_dp_link_train_cr] *ERROR* clock
recovery failed
Feb 25 10:44:01 barfoos24 kernel: [drm:radeon_dp_link_train_cr] *ERROR*
displayport link status failed
Feb 25 10:44:01 barfoos24 kernel: [drm:radeon_dp_link_train_cr] *ERROR* clock
recovery failed
Feb 25 10:44:01 barfoos24 kernel: [drm:radeon_dp_link_train_cr] *ERROR*
displayport link status failed
Feb 25 10:44:01 barfoos24 kernel: [drm:radeon_dp_link_train_cr] *ERROR* clock
recovery failed
Feb 25 10:44:01 barfoos24 kernel: [drm:radeon_dp_link_train_cr] *ERROR*
displayport link status failed</pre>
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