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Created attachment 509964 [details] Kernel oops when copying to USB stick then unmounting Description of problem: My machine has been experiencing regular hangs during operation since installing F15 (previously it's been rock solid). Been struggling to find a good way to reproduce. Seems that copying a large video file to a USB stick using GNOME the hitting Eject in Nautilus works best. Running Google Chrome or Thunderbird increase the likelihood of hitting the problem. Running complex compiles or watching HD video doesn't cause any problems. The machine locks solid. Sometimes it ends up with a kernel oops backtrace on the console other times it just locks solid in X. Version-Release number of selected component (if applicable): kernel-2.6.38.8-32.fc15.x86_64 I've been able to hook up a serial connection to another machine to capture oops. I've attached a copy of the latest oops.
Created attachment 509984 [details] Second crash A further oops which looks to be the same bug but with a different backtrace. This occurred during ongoing use of the system which doggedly wouldn't crash using the mechanisms I was able to use earlier.
Oops. Ran memtest86+ found a dodgy DIMM. Removing the faulty parts seem to fix the problem.