[Bug 1572780] [NEW] Keyboard and mouse not responding after locking

[Juan Andrés Ghigliazza]

Public bug reported:

In Ubuntu 16.04, after locking my computer, I cannot return to the login
screen. There is just a blank screen, and not signal is received from
the monitor neither if I press some keys on the keyboard, nor if I move
the mouse. This is happening both, when the computers locks
automatically, or when I lock it manually with Ctrl+Alt+l.

I know that the computer is still working perfectly because when this
happens, I can make a ssh from other hosts, and can login and do
anything. If I restart lightdm service remotely (from the ssh session),
I can use it locally again.

I think that the problem could be related to my video driver (my card is
"01:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
[AMD/ATI] RV516 [Radeon X1300/X1550 Series]"), because I have tried in
others computers, and I cannot reproduce the problem.

Thanks very much

** Affects: pam (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1572780

Title:
  Keyboard and mouse not responding after locking

Status in pam package in Ubuntu:
  New

Bug description:
  In Ubuntu 16.04, after locking my computer, I cannot return to the
  login screen. There is just a blank screen, and not signal is received
  from the monitor neither if I press some keys on the keyboard, nor if
  I move the mouse. This is happening both, when the computers locks
  automatically, or when I lock it manually with Ctrl+Alt+l.

  I know that the computer is still working perfectly because when this
  happens, I can make a ssh from other hosts, and can login and do
  anything. If I restart lightdm service remotely (from the ssh
  session), I can use it locally again.

  I think that the problem could be related to my video driver (my card
  is "01:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
  [AMD/ATI] RV516 [Radeon X1300/X1550 Series]"), because I have tried in
  others computers, and I cannot reproduce the problem.

  Thanks very much

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