Sunday, January 13, 2019

bug reporting - How to report bug after hard crash?


I just had a hard lock-up crash not even a Alt + Shift + SysRq + R + S + E + I + U + B could solve. I've now rebooted and would like to report the bug with the saved logs.


What's the best way to report it?



If something you did triggered the freeze use Apport and trigger the freeze again. Apport will detect it automatically and you should be able to file a bug-report.


This is an excerpt from Debugging System Crashes



  • If your system crashes at random
    intervals, perform a MemoryTest first
    before filing any bug reports or
    support requests

  • If your system crashes when a
    particular action occurs, and this is
    repeatable every time, try the
    following steps:



    1. Try to reproduce the crash on a text
      console (Control+Alt+F1) if
      possible. If the crash occurs during
      startup, select the recovery mode
      option to disable the splash screen

    2. When the crash occurs, press
      Alt+SysRq+1 (one, not L) followed by
      Alt+SysRq+t. If using a text
      console, you should see a trace
      dumped to the screen. If the system
      is sufficiently alive, it will also
      be logged to /var/log/kern.log and
      visible in the output from dmesg.
      This information shows where the
      crash occurred, and should be
      included in any problem reports. If
      the output is not saved in any file,
      or the system is so bad off that you
      cannot retrieve it, you can either
      take a digital photo, or hand write
      the results. Almost all of the
      output is important (so please don't
      copy the one line you think is
      important, because context means
      everything).



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