[Bug 76490] Hang during boot when DPM is on (R9 270X)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76490

Benjamin Bellec <b.bellec at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|FIXED                       |---
             Status|RESOLVED                    |REOPENED

--- Comment #108 from Benjamin Bellec <b.bellec at gmail.com> ---
(In reply to Michael Rosile from comment #107)
> Thank you Alex Deucher!
> I have the same graphics card as samdenies (XFX R9 270X), and was looking
> through various mailing lists to find an answer (I wasn't expecting to find
> an answer at bugs.freedesktop.org).  I knew the issue was related to the
> memory clock speed, but didn't know how to change it in Linux, until now.
> 
> I manually added the required 'quirk' line to a custom 4.5.2 kernel, and
> it's working great!

This is not fixed at all:
- there is probably several other videocards from other vendors which don't
works (the Gigabyte "GV-R737WF2OC-2GD" for instance)
- the quirk added underclocks the mclock from 5600 MHz to 4800 MHz, so you
don't get the full performance you are expecting

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