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[Bug 1558764] Re: Sysrq trigger g cause system hang on Ubuntu 15.10

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Eric Huang <jinhuieric.huang@xxxxxxx>
Date: Tue, 05 Apr 2016 19:05:22 -0000
Reply-to: Bug 1558764 <1558764@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

I used the same custom build kernel in both 14.04 and 15.10, so it
should not be kernel issue.

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https://bugs.launchpad.net/bugs/1558764

Title:
  Sysrq trigger g cause system hang on Ubuntu 15.10

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I are using kgdb to debug kernel driver. The break point and sysrq
  work fine on Ubuntu 14.04. But when I upgrade Ubuntu from 14.04 to
  15.10, the sysrq trigger g (alt+sysrq+g) doesn't make gdb break and
  system hangs. It is a regression. The issue only happens after kernel
  booting up. It is OK during kernel booting.

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