Bug 7678

Summary:	xdg-screensaver resume hangs sometimes
Product:	Portland	Reporter:	Tom Whipple <bug>
Component:	xdg-utils	Assignee:	Portland Integration Project <portland>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	high
Version:	beta2
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Bug Depends on:
Bug Blocks:	7011

Description Tom Whipple 2006-07-28 11:10:06 UTC

xdg-screensaver resume sometimes hangs. Unfortunately, this appears to be
somewhat random in re-occurance, so I can't say exactly how to reproduce. It
seems to be tied to doing suspend/resume in a short period of time. (Note that a
'sleep 1' call in between doesn't always help.)

In the following example the command shown was repeted 3 times with no changes.
As quickly as the first two ended, I manually re-ran it. As I write this, the
third occurance has not returned.

In every case 'ps' reveals that it is the resume command that is hanging.

$ xdg-screensaver suspend $WINDOWID; echo $?; xdg-screensaver status;
xdg-screensaver resume $WINDOWID; echo $?; xdg-screensaver status
0
disabled
0
enabled

$ xdg-screensaver suspend $WINDOWID; echo $?; xdg-screensaver status;
xdg-screensaver resume $WINDOWID; echo $?; xdg-screensaver status
0
enabled
0
enabled

$ xdg-screensaver suspend $WINDOWID; echo $?; xdg-screensaver status;
xdg-screensaver resume $WINDOWID; echo $?; xdg-screensaver status
0
enabled
Terminated
143
enabled

Comment 1 Tom Whipple 2006-07-28 11:12:38 UTC

[tw@linux:~/portland/xdg-utils/tests]
$ include/system_info 
distribution: suse 10.0
kde: 3.4.2
gnome: 2.12.0
xfce: not present (didn't find xfce4-session)
running: gnome  
user: normal
uname: Linux linux 2.6.13-15.10-default #1 Fri May 12 16:27:12 UTC 2006 i686
i686 i386 GNU/Linux
xset data:
-------------------------------------
Keyboard Control:
  auto repeat:  on    key click percent:  0    LED mask:  00000000
  auto repeat delay:  500    repeat rate:  30
  auto repeating keys:  00ffffffdffffbbf
                        fadfffdfffdfe5ef
                        ffffffffffffffff
                        ffffffffffffffff
  bell percent:  50    bell pitch:  400    bell duration:  100
Pointer Control:
  acceleration:  2/1    threshold:  4
Screen Saver:
  prefer blanking:  yes    allow exposures:  yes
  timeout:  0    cycle:  0
Colors:
  default colormap:  0x20    BlackPixel:  0    WhitePixel:  16777215
Font Path:
 
/usr/X11R6/lib/X11/fonts/misc:unscaled,/usr/X11R6/lib/X11/fonts/75dpi:unscaled,/usr/X11R6/lib/X11/fonts/Type1,/usr/X11R6/lib/X11/fonts/URW,/usr/X11R6/lib/X11/fonts/truetype,/usr/X11R6/lib/X11/fonts/uni:unscaled,/opt/kde3/share/fonts
Bug Mode: compatibility mode is disabled
DPMS (Energy Star):
  Standby: 0    Suspend: 0    Off: 0
  DPMS is Disabled
File paths:
  Config file:  /etc/X11/xorg.conf
  Modules path: /usr/X11R6/lib/modules
  Log file:     /var/log/Xorg.0.log
-------------------------------------

Comment 2 Tom Whipple 2006-07-28 12:14:33 UTC

Adding sleep calls (as now done in tests) helps but does not solve the problem. 

To reproduce this bug, do

$ cd xdg-utils/tests
$ while [ 1 ] ; do ./testrun xdg-screensaver/t.0*; done

and go have a coffee. When you get back and find that
test_screensave_suspend_basic or test_screensave_resume_basic is waiting for
several (>5) seconds, do

$ ps -ef | grep xdg 

and look for xdg-screensaver resume.

Comment 3 Waldo Bastian 2006-08-09 14:33:29 UTC

This was presumably because of some race condition in the startup of gnome-
screensaver (gnome-screensaver bug?) xdg-screensaver no longer exits/starts 
gnome-screensaver and as such this problem is assumed to have been fixed for 
beta 3.

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