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Bug 77247

Summary: Problems with XFree86 after changing system clock
Product: [Retired] Red Hat Linux Reporter: Need Real Name <zlb>
Component: XFree86Assignee: Mike A. Harris <mharris>
Status: CLOSED RAWHIDE QA Contact: David Lawrence <dkl>
Severity: medium Docs Contact:
Priority: medium    
Version: 8.0   
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2002-12-14 15:58:09 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Attachments:
Description Flags
X server log file
none
X config file
none
This patch seems to solve my problem. none

Description Need Real Name 2002-11-04 07:19:08 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1) Gecko/20021003

Description of problem:
XFree86-4.2.0: the keys do not repeat after changing system time backwards.


Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Change the system clock a coupel of minutes backwards using `date'.

2. The keys do not repeat any more under X before system time gets
   to the point when the time was changed. On my laptop (ATI Rage     
   Mob.), the windows are also frozen (i.e., they can't be dragged).

   I ran into this problem after suspending/resuming my laptop and
   finally I figured out that the problem was caused by the
   'hwclock' command in /etc/sysconfig/apm-scripts/apmscript

   I believe that this bug is related to some timing functions
   in XFree86 4.2.0

Additional info:

Comment 1 Mike A. Harris 2002-11-04 08:45:08 UTC
I probably don't need it, but just in case.... could you attach your
X server config file and log?  It might come in handy perhaps while
troubleshooting.

Comment 2 Thais Smith 2002-11-04 11:03:10 UTC
Might this be because X events are timestamped? "Old" events would therefore 
get ignored. I get the same problem when correcting the clock under a number 
of different window managers (kwin, metacity, afterstep). Quick workaround is 
to switch to another VT and back again. Just a thought.

Comment 3 Need Real Name 2002-11-05 00:09:09 UTC
Created attachment 83604 [details]
X server log file

Comment 4 Need Real Name 2002-11-05 00:11:27 UTC
Switching to a VT then back does not solve the problem.

I have attached my X config/log files.

Comment 5 Need Real Name 2002-11-05 00:12:03 UTC
Created attachment 83605 [details]
X config file

Comment 6 Need Real Name 2002-11-07 23:53:58 UTC
Created attachment 84104 [details]
This patch seems to solve my problem.

Comment 7 pedro_rodriguez 2002-11-13 18:18:21 UTC
There is a also a fix by Egbert Eich in xfree cvs :

http://cvsweb.xfree86.org/cvsweb/xc/programs/Xserver/hw/xfree86/common/xf86Io.c.diff?r1=3.49&r2=3.50

290. Fixed GetTimeInMillis() to use deltas instead of absolute time
     returend by gettimeofday(). This ensures time is monotonic in X
     (Egbert Eich).

Comment 8 Mike A. Harris 2002-12-14 15:58:09 UTC
Indeed Egbert's fix is in CVS.  I have backported the fix to 4.2.1 and 4.1.0,
and it will appear in all future erratum releases.

Thanks guys.