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[Johan Nilsson <johan5@xxxxxxxx>]

I have a similar issue with my laptop with AMD graphics running ubuntu
gnome 15.04, which I originally reported as #1447356. I have kernels
3.19.0-15 and 3.19.0-22 and both of them give a black screen after the
grub screen.

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https://bugs.launchpad.net/bugs/1475914

Title:
  login freezes or black screen with kernel higher than 3.19.0-15

Status in xserver-xorg-video-ati package in Ubuntu:
  Confirmed

Bug description:
  Env :
  Linux 3.19.0-22-generic #15-Ubuntu SMP Thu Apr 16 23:32:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
  VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]
  using xorg default driver (not the proprietary)

  Facts :
  - On the login page, just after the boot, the system is freezed (or looping)
  - I can't open a terminal with Ctrl+Alt+F1
  - When I choose a previous kernel version from Grub, the problem occurs with all versions I had installed since 3.19.0-16
  3.19.0-15   OK
  3.19.0-16   KO
  3.19.0-18   KO
  3.19.0-20   KO
  3.19.0-21   KO
  3.19.0-22   KO
  - When I choose the recovery mode of the version that have the problem, the recovery menu freezes also (see attachment)
  - I've done a clean install on a new disk and after the update of the kernel (3.19.0-15 -> 3.19.0-22) I have a black screen after the boot (no login screen). And I have the same problem trying the recovery mode with version 3.19.0-22.

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