[Bug 66963] r600: linux v3.11.0-RC isn't booting with radeon.dpm=1 option in grub

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66963

--- Comment #103 from Alex Deucher <agd5f at yahoo.com> ---
(In reply to comment #102)
> If you could explain me where is kernel command line (when I'm seeing GRUB
> menu push "e" or "c"; and if "c" what to do after I entered radeon.modeset=0
> in there?), I would try it. I'm just a newbie using kubuntu a few months.

in the grub menu select the kernel you want to boot and press 'e' then move to
the end of the line that starts:
        linux   /boot/<blah blah blah>
and append the options to the end of that line.  e.g.,
       linux   /boot/<blah blah blah> radeon.modeset=0 1
The '1' means boot into single user mode rather than X.

Also, if you haven't already, try disabling aspm:
       linux   /boot/<blah blah blah> radeon.aspm=0 radeon.dpm=1

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