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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - A10-8780P (Carrizo) + R7 M260/M265 does not boot without any "workaround" parameter."
href="https://bugs.freedesktop.org/show_bug.cgi?id=101483">101483</a>
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<th>Summary</th>
<td>A10-8780P (Carrizo) + R7 M260/M265 does not boot without any "workaround" parameter.
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>XOrg git
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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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>DRM/AMDgpu
</td>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>lx@o2mail.de
</td>
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<div>
<pre>This bug has been reported at launchpad.net, #163915
My notebook is a HP Pavilion 17-g164ng with an AMD A10-8780P APU.
The sytem (Ubuntu 16.04.2, kernel 4.8.0, UEFI) does not work when not booted
using workaround parameters:
nomodeset: resolution 800x600
nomodeset xforcevesa: 1600x900 (optimal resolution)
amd_iommu=off: "boot finished" sound within a minute, black screen, ssh login
possible
no parameter: no boot, no (remote) access, no dmesg, shut down by pressing off
button for several seconds.
I have reported this bug at launchpad.net on 2016-11-05.
At that time I used 16.04.1, kernel 4.4.0. While booting, the screen was
black, one flash, black backlight on-off-on. After more than three minutes,
remote (ssh) access was possible, reboot by SysRQ B.
Recently I tested upstream kernels.
The results depend on the update-state of the installation.
Using installed Version 16.04.2, kernel 4.8.0-36 for installation of the
upstream kernel, booting without workaround parameter:
"boot finished" sound after 45 sec., screen black, no further HDD activity, ssh
login possible, SysRQ reaction.
Using the actual, updated system, kernel 4.8.0-54 for installation of the
upstream kernel, booting without workaround parameter:
no "boot finished" sound, no remote login (ssh).
Reboot/shutdown by SysRQ keys after about 3 minutes possible.</pre>
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