[Bug 99180] Xorg server crash when initializing secondary discrete Radeon HD 8730M GPU

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99180

--- Comment #1 from Michel Dänzer <michel at daenzer.net> ---
(In reply to Alexander Gagarin from comment #0)
> With the following contents (that worked for a long time) of
> /etx/X11/xorg.conf.d/20-gpu.conf:

BTW, please use /etc/X11/xorg.conf itself for your configuration, not any
xorg.conf.d snippets.


> 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

FWIW, this configuration is incorrect for your hardware setup. The Screen
stanzas are for associating multiple Device sections to the same GPU.


> It seems that radeon_drv dislikes config with depth=24 bpp and fb=32 bpp.

That's what basically everybody else is using...


> This behaviour seems to be introduced with kernel 4.8 and still remains in
> 4.9.

Weird. Can you bisect the kernel, or get a gdb backtrace of the Xorg crash
(make sure debugging symbols are available for /usr/libexec/Xorg and

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