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[Ken Sharp <916639@xxxxxxxxxxxxxxxxxx>]

** Changed in: kdenlive (Ubuntu)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/916639

Title:
  render crashes with AMD bulldozer in Ubuntu Precise after Jan 10
  updates

Status in kdenlive package in Ubuntu:
  Fix Released

Bug description:
  Beginning with the Jan 10 updates to Ubuntu Precise, Kdenlive
  rendering crashes almost instantly on and only on my AMF FX-8150
  "bulldozer" machine.  After a VERY short "waiitng," I get the
  "rendering crashed, video will probably be corrupted" message and
  rendering stops, the same as if I had run "killall melt."

  Rolling back kdenlive, melt, mlt, or ffmpeg or any combination of them
  to older versions does NOT stop the problem, and I have been unable to
  find the offending package that introduced the problem, for which
  kdenlive or maybe mlt needs to be rebuilt. There were a lot of KDE
  updates that day, but when I copied and older snapshot of Precise that
  worked, and reran the updates with the KDE updates pinned, the render
  crashed recurred anyway, so I don't think the KDE changes were
  responsible.

  Both the 0.8.2 version of Kdenlive in the Ubuntu precise repos and the 0.8.3 version in the Sunab PPA (kdenlive_0.8.3+git20120105.9dea7a4b-0ubuntu0~sunab~oneiric1_amd64.deb) are affected exactly the same way
  when running from an SSD boot drive on my AMD FX 8150 "bulldozer" machine. They do not crash when running on Phenom II x4 or even Intel Atom, just on AMD "bulldozer." I was even able to plug the laptop's hard drive (a 160 MB 5400RPM magnetic drive) into the AMD machine and boot from it, then render OK from kdenlive, but when I then copied that filesystem onto the SSD, and booted from that, the crashes on render returned.

  I will upload a traceback copy when I get home, but libmlt (something)
  is the last thing showing near the end, along with a "stack" reference
  within a few lines of it.

  For now, I am using a backup partition with a Dec 27 snapshot of
  Precise and the PPA version of Ubuntu for video work on the "buldozer"
  machine, until this is fixed.

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