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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - radeon does not pick up an X screen, modesetting does (r600, ppc, 2nd GPU)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101446">101446</a>
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<th>Summary</th>
<td>radeon does not pick up an X screen, modesetting does (r600, ppc, 2nd GPU)
</td>
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<th>Product</th>
<td>xorg
</td>
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<th>Version</th>
<td>7.7 (2012.06)
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<th>Hardware</th>
<td>PowerPC
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<th>OS</th>
<td>All
</td>
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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/Radeon
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<th>Assignee</th>
<td>xorg-driver-ati@lists.x.org
</td>
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<th>Reporter</th>
<td>erhard_f@mailbox.org
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=131976" name="attach_131976" title="xorg.log with "radeon" driver">attachment 131976</a> <a href="attachment.cgi?id=131976&action=edit" title="xorg.log with "radeon" driver">[details]</a></span>
xorg.log with "radeon" driver
My setup is a PowerMac 11,2 G5 with 2 graphic cards, a Nvidia GT6600 (1st
PCIe-slot, Mac-BIOS) and a Radeon 5450 (2nd PCIe-slot, x86-BIOS). I need the
Nvidia for the OpenFirmware bootmenu and booting the G5 up. I want to drive X
with the Radeon only. Which is possible using "modesetting", but not with
"radeon".
I needed "video=offb:off video=nouveaufb:off video=radeonfb:off
nouveau.modeset=0 radeon.modeset=1" as kernel boot parameter to get the
framebuffer on the Radeon running as /dev/fb0.
To get X running I needed this minimal /etc/X11/xorg.conf:
Section "ServerFlags"
Option "AutoAddGPU" "false"
EndSection
Section "Device"
Identifier "Card_x86"
Driver "radeon"
# Driver "modesetting"
BusID "PCI:6:0:0"
EndSection
This setup works with modesetting picking up a screen. So I guess I am missing
some important detail, which modesetting generously overlooks or it's a bug of
the radeon driver.</pre>
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