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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
</td>
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<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - On system boot both DIS and IGD cards are powered on."
href="https://bugs.freedesktop.org/show_bug.cgi?id=61114">61114</a>
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Summary</th>
<td>On system boot both DIS and IGD cards are powered on.
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Reporter</th>
<td>william@firstyear.id.au
</td>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Product</th>
<td>DRI
</td>
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<p>
<div>
<pre>On system boot from kernels post 3.6, both the discrete radeon and integrated
intel card are powered on.
This creates confusion in Xorg since it believes there are two displays - It
creates a smaller box on the top left of screen as it attempts to use both. It
can cause kernel panics during suspend resume.
cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD: :Pwr:0000:00:02.0
1:DIS:+:Pwr:0000:01:00.0
2:DIS-Audio:+:Pwr:0000:01:00.1
Should be
cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD: :Off:0000:00:02.0
1:DIS:+:Pwr:0000:01:00.0
2:DIS-Audio:+:Pwr:0000:01:00.1
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI
Whistler XT [AMD Radeon HD 6700M Series]
The system is an apple macbook pro 8,2 with gmux using EFI.</pre>
</div>
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