Public bug reported:

I get short freezes in screen when I turn dpm on. the nature of the
freeze is that only the display freezes, and sound and mouse and
keyboard movements are actually being done. I also tested fglrx, and
though less often, the freezes still happen there too. when I use the
open-source driver without radeon.dpm=1 kernel parameter everything
works perfectly fine, but the fan noise of the vga card is high. if you
need any more info please let me know.


Ubuntu 13.10  Linux Punisher 3.11.0-14-generic #21-Ubuntu SMP Tue Nov 12
17:07:40 UTC 2013 i686 athlon i686 GNU/Linux


xserver-xorg-video-ati:
  Installed: 1:7.2.0-0ubuntu10
  Candidate: 1:7.2.0-0ubuntu10
  Version table:
 *** 1:7.2.0-0ubuntu10 0
        500 http://archive.ubuntu.com/ubuntu/ saucy/main i386 Packages
        100 /var/lib/dpkg/status

** Affects: xserver-xorg-video-ati (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1260503

Title:
  short screen freezes with radeon.dpm=1 kernel parameter

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