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[Bug 1632197] [NEW] display freezes after recent apt update/upgrade


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After a recent upgrade (which includes linux,xorg-server,compiz,unity...see 

below), the display periodically freezes and is completely unresponsive

keyboard and mouse (other than pointer movement), after attempting to
drag a

window across the workspace.  This is a problem for both of two modes of

dragging:  <ALT>+<left mouse button>+drag and <super>+s then drag.
Other than

when dragging windows, no other activity on the desktop/display appears
to be a

problem.  The system is otherwise quite stable.


In addition (and this is also new since the upgrade and probably
related), the

display and input goes dead after closing the lid on the laptop.  This

whether displaying the desktop, or in a virtual terminal, or when logged
out with

the login screen displayed.  The display goes blank (per the usual), but
does not

go active again when the lid is raised (bad).  The system is configured
to "never

suspend" and to "do nothing" when the lid is closed and to "never" turn
the screen

off due to inactivity.

The noted behavior is now on exhibit with both the upgraded kernel and
the "old"

kernel (4.4.0-38-generic and 4.4.0-36-generic, respectively).  Prior to

upgrade, this laptop was perfectly stable (booting 4.4.0-36), and (for
what it's

worth) windows10 (ughhh) is still quite stable, suggesting that this is
not a case

of hardware gone flaky.

I strongly suspect an interaction between the upgraded compiz package
and the

upgraded xorg-server as the source of the problem, since the underlying

continues to operate even though the display and input are dead (deduced
by the

fact that scheduled cron jobs run to completion well after the display
has gone

dead), and because the first problem only occurs when dragging a window.

would help if I were able to switch into a virtual terminal, but the
keyboard is

totally deceased.)

There is no indication of a problem in the log files that I have been
able to

discern.  However, there is at least one instance of dumped core (so to
speak) by

upstart in /var/crash since the upgrade.

I realize that this is not enough detail to be of much help, and not
much of the

bug reporting docs seem to apply to this case, so please do let me know
what more

I can do to assist in tracking down the problem.

Ubuntu release 16.04... all upgrades are current as of 2016-10-07
ideapad 100S laptop
Intel Atom CPU Z3735F @ 1.33GHz × 4
Graphics: Intel Bay Trail

uname -a
Linux khampton-Lenovo-ideapad-100S-11IBY 4.4.0-38-generic #57-Ubuntu SMP Tue Sep 6 

15:42:33 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

00:00.0 Host bridge: Intel Corporation Atom Processor Z36xxx/Z37xxx Series SoC 

Transaction Register (rev 0f)
00:02.0 VGA compatible controller: Intel Corporation Atom Processor Z36xxx/Z37xxx 

Series Graphics & Display (rev 0f)
00:14.0 USB controller: Intel Corporation Atom Processor Z36xxx/Z37xxx, Celeron 

N2000 Series USB xHCI (rev 0f)
00:1a.0 Encryption controller: Intel Corporation Atom Processor Z36xxx/Z37xxx 

Series Trusted Execution Engine (rev 0f)
00:1f.0 ISA bridge: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Power 

Control Unit (rev 0f)

The upgrade included the following packages, as output by dpkg-log-
summary, with

the obvious innocents stripped out:

u  accountsservice                          2016-10-07 11:32:34

2ubuntu11.1             0.6.40-2ubuntu11.2            
u  accountsservice:amd64                    2016-10-07 11:32:32   0.6.40-

2ubuntu11.1             0.6.40-2ubuntu11.2            
u  bamf                                     2016-10-07 11:33:27   

0.5.3~bzr0+16.04.20160701-0ubuntu1 0.5.3~bzr0+16.04.20160824-0ubuntu1
u  bind9                                    2016-10-07 11:28:56   

1:9.10.3.dfsg.P4-8ubuntu1      1:9.10.3.dfsg.P4-8ubuntu1.1   
u  compiz:all                               2016-10-07 11:33:33   

1: 1:
u  gdk-pixbuf                               2016-10-07 11:33:05   2.32.2-1ubuntu1  

u  gtk2-engines-murrine:amd64               2016-10-07 11:35:19   0.98.2-

0ubuntu2.1              0.98.2-0ubuntu2.2             
u  ifupdown:amd64                           2016-10-07 11:27:23   0.8.10ubuntu1    

u  initramfs-tools                          2016-10-07 11:28:54   0.122ubuntu8.1   

u  initramfs-tools:all                      2016-10-07 11:28:53   0.122ubuntu8.1   

u  isc-dhcp                                 2016-10-07 11:28:57   4.3.3-

5ubuntu12.1              4.3.3-5ubuntu12.3             
u  klibc                                    2016-10-07 11:28:52   2.0.4-

8ubuntu1.16.04.1         2.0.4-8ubuntu1.16.04.2        
u  libunity                                 2016-10-07 11:34:55   

7.1.4+15.10.20151002-0ubuntu2  7.1.4+16.04.20160701-0ubuntu1 
u  linux                                    2016-10-07 11:36:17   4.4.0-36.55      

u  linux-meta                               2016-10-07 11:43:39      

u  network-manager                          2016-10-07 11:35:58   1.2.0-

0ubuntu0.16.04.3         1.2.2-0ubuntu0.16.04.1        
u  network-manager:amd64                    2016-10-07 11:48:15   1.2.0-

0ubuntu0.16.04.3         1.2.2-0ubuntu0.16.04.1        
u  ntp:amd64                                2016-10-07 11:31:53   1:4.2.8p4+dfsg-

3ubuntu5.1      1:4.2.8p4+dfsg-3ubuntu5.3     
u  snap-confine                             2016-10-07 11:32:05   1.0.38-

0ubuntu0.16.04.8        1.0.38-0ubuntu0.16.04.10      
u  snap-confine:amd64                       2016-10-07 11:31:55   1.0.38-

0ubuntu0.16.04.8        1.0.38-0ubuntu0.16.04.10      
u  snapd:amd64                              2016-10-07 11:49:11   2.12+0.16.04     

u  systemd                                  2016-10-07 11:27:08   229-4ubuntu7     

u  systemd:amd64                            2016-10-07 11:27:39   229-4ubuntu7     

u  ubuntu-drivers-common:amd64              2016-10-07 11:32:06   1:       

u  unity                                    2016-10-07 11:36:14   

7.4.0+16.04.20160801.2-0ubuntu1 7.4.0+16.04.20160906-0ubuntu1 
u  unity:amd64                              2016-10-07 11:36:00   

7.4.0+16.04.20160801.2-0ubuntu1 7.4.0+16.04.20160906-0ubuntu1 
u  xorg-server                              2016-10-07 11:27:14   2:1.18.3-

1ubuntu2.3            2:1.18.4-0ubuntu0.1

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

** Tags: bot-comment regression-update xenial
display freezes after recent apt update/upgrade
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