[Bug 98046] iMac11,1 (RV770/M98L [Mobility Radeon HD 4850]) needs nomodeset to boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98046

--- Comment #8 from Justin Thiessen <justin.thiessen at gmail.com> ---
Hi,

I'm still seeing this issue with an iMac11,1 with the identical graphics
(RV770/M98L [Mobility Radeon HD 4850])

This is with kubuntu 17.04:

kernel: 4.10.0-32-generic

radeon driver info:
--------------------
libdrm-radeon1:amd64                   2.4.76-1
xserver-xorg-video-radeon              1:7.9.0-0ubuntu1

I only get a working main display using 'nomodeset', which of course is
disabling the radeon driver.

Any suggested patches or things to try?

Thanks,

Justin Thiessen

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