From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 83531] New: radeon 6650m cannot boot without radeon.runpm=0
Date: Sat, 30 Aug 2014 16:25:32 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=83531

            Bug ID: 83531
           Summary: radeon 6650m cannot boot without radeon.runpm=0
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.13-3.15.10
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: kvbevsauce@gmail.com
        Regression: No

my laptop is a lenovo z575 with an amd a6-3420 apu and a 6650m for hybrid
graphics. I am running fedora 20 with the latest kernel of 3.15.10

ever since I updated to kernel 3.13 sometime ago when hybrid DPM was enabled my
laptop will not boot without the above kernel parameter.

i have the plymouth boot screen disabled so it shows text based boot. the
moment the boot text "fedora 20 hisenbug" shows up, between 3 and 5 seconds
later the cursor will stop blinking and the system will be frozen. sometimes
more boot text shows up after sometimes not.

any help to get dynamic power management working.

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