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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Xorg server crash when initializing secondary discrete Radeon HD 8730M GPU"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99180">99180</a>
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<tr>
<th>Summary</th>
<td>Xorg server crash when initializing secondary discrete Radeon HD 8730M GPU
</td>
</tr>
<tr>
<th>Product</th>
<td>xorg
</td>
</tr>
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<th>Version</th>
<td>7.7 (2012.06)
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>Driver/Radeon
</td>
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<th>Assignee</th>
<td>xorg-driver-ati@lists.x.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>unientity@gmail.com
</td>
</tr>
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=128628" name="attach_128628" title="Xorg intialization log with crash">attachment 128628</a> <a href="attachment.cgi?id=128628&action=edit" title="Xorg intialization log with crash">[details]</a></span>
Xorg intialization log with crash
I have an HP 850 Elitebook laptop with Intel GPU and secondary discrete AMD HD
8730M GPU.
With the following contents (that worked for a long time) of
/etx/X11/xorg.conf.d/20-gpu.conf:
ection "Device"
Identifier "intel"
Driver "intel"
Option "DRI" "3"
Option "VSync" "False"
BusID "PCI:0:2:0"
Screen 0
EndSection
Section "Device"
Identifier "radeon"
Driver "radeon"
Option "VSync" "False"
Option "DRI" "3"
BusID "PCI:3:0:0"
Screen 1
EndSection
my Xorg server crashes during intialization stage with the following backtrace:
[ 42.673] (EE) Backtrace:
[ 42.673] (EE) 0: /usr/libexec/Xorg (OsLookupColor+0x139) [0x59e7d9]
[ 42.674] (EE) 1: /lib64/libpthread.so.0 (__restore_rt+0x0) [0x7ff7a1c705bf]
[ 42.674] (EE) 2: /usr/libexec/Xorg (xf86SetDepthBpp+0x5d0) [0x4839c0]
[ 42.674] (EE) 3: /usr/lib64/xorg/modules/drivers/radeon_drv.so
(_init+0x3e6e6) [0x7ff79cd26c16]
[ 42.674] (EE) 4: /usr/libexec/Xorg (InitOutput+0xb5d) [0x47d78d]
[ 42.674] (EE) 5: /usr/libexec/Xorg (InitFonts+0x216) [0x43ae06]
[ 42.674] (EE) 6: /lib64/libc.so.6 (__libc_start_main+0xf1) [0x7ff7a18b9401]
[ 42.674] (EE) 7: /usr/libexec/Xorg (_start+0x2a) [0x424cfa]
[ 42.675] (EE) 8: ? (?+0x2a) [0x2a]
[ 42.675] (EE)
[ 42.675] (EE) Segmentation fault at address 0x0
[ 42.675] (EE)
Fatal server error:
[ 42.675] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 42.675] (EE)
It seems that radeon_drv dislikes config with depth=24 bpp and fb=32 bpp. If I
add the following section to my 20-gpu.conf:
Section "Screen"
Identifier "def_screen"
Device "intel"
GPUDevice "radeon"
DefaultDepth 24
DefaultFbBpp 24
EndSection
forcing fpbbb=24, then crash disappears (Xorg seems to initialize fine) but the
screen is completely blank. If at the same time I change driver to
"modesetting" then Xorg crashes again.
This behaviour seems to be introduced with kernel 4.8 and still remains in 4.9.</pre>
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