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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Thanks for testing!

There are two commits in v4.0 that may be the fix:
d0af71a tg3: Hold tp->lock before calling tg3_halt() from tg3_init_one()
20d14a5 tg3: move init/deinit from open/close to probe/remove

I built a Vivid test kernel with a cherry-pick of these two commits.  It can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1428111/

Can you test this kernel and see if it resolves this bug?

Note that you will need to install both the linux-image and linux-image-
extra .deb packages.

** Also affects: linux (Ubuntu Vivid)
   Importance: High
       Status: Confirmed

** Tags added: vivid

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https://bugs.launchpad.net/bugs/1428111

Title:
  Kernel crash on Dell Latitude 5530 (tg3 driver involved)

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Vivid:
  Confirmed

Bug description:
  After upgrading from Ubuntu 14.10 to 15.04 the system is not starting
  anymore. After disabling the splash screen I get lots of Error
  messages on the console. The system is unresponsive. Kernel 3.16 runs
  without problems. So does 3.19 on another system without Broadcom LAN-
  adapter. "screenshot" is attached. The error occures before entering
  the password for Luks-encryption. So it's very likely, it still doing
  initrd-stuff ...

  System is a Dell Latitude 5530, Core i5, 16 GB RAM
  running Ubuntu 15.04 (AMD64) with all updates available until 2015-03-04 (upgraded from 14.10)

  lspci.log & dmesg.log  are taken wth the "old" kernel 3.16 as was not
  able to boot 3.19.

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