[Bug 70439] Mobility 4570: System freezes after ~5s of enabling audio via xrandr

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70439

--- Comment #14 from Mohammad AlSaleh <CE.Mohammad.AlSaleh at gmail.com> ---
(In reply to comment #11)
> Created attachment 87616 [details] [review]
> possible fix
> 
> Please try this patch and append radeon.audio=1 to the kernel command line
> in grub.

There appears to be a serious regression here.

System hangs (black screens) if the HDMI monitor is connected before xinit. And
hangs if the monitor is attached after xinit when enabled via xrandr.

In the latter case, the hanged frame is displayed on the monitor, but before
being resized to occupy the whole screen and with noise artifacts.

Note: Everything works correctly with 3.11.5. 'radeon.audio=1' works with and
without DPM.

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