Bug 3693

Summary:	Unstable System Timer
Product:	Timers	Reporter:	Prasad (s.prasad)
Component:	Other	Assignee:	john stultz (john.stultz)
Status:	REJECTED DUPLICATE
Severity:	blocking
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	Linux version 2.6.8-1-686 (dilinger@toaster.hq.voxel.net) (gcc v	Subsystem:
Regression:	---	Bisected commit-id:

Description Prasad 2004-11-03 22:18:41 UTC

Distribution: Debian Unstable (Sarge)
Hardware Environment: P4 2.4Gigs, Intel i865G Chipset, IBM ThinkCentre
Software Environment: Debian Unstable with all the updates
Problem Description: When the system is left untouched for about 12 hours, the
system time becomes unstable.  Attached is the output of "while [ true ]; do
hwclock; date; done"

Steps to reproduce: System when left untouched for quote some time is producing
the problem.  The problem isn't occuring on "Fedora Core II with 2.6.6-1.435" on
the same system.  It isn't occuring with the same kernel on an intel 845 chipset
based p3 system.

No crond or time daemons running. (Only sshd, xfsd, syslogd and klogd running)
Am available for any kind of data or inputs regarding this.

Output of "while [ true ]; do hwclock; date; done"
(Note the system time change - its always between 10:14:11 & 10:14:14")
(This snapshot was taken 13 mins after "hwclock --hctosys")
Thu Nov  4 10:27:05 2004  -0.280112 seconds
Thu Nov  4 10:14:11 IST 2004
Thu Nov  4 10:27:06 2004  -0.997593 seconds
Thu Nov  4 10:14:12 IST 2004
Thu Nov  4 10:27:07 2004  -0.997684 seconds
Thu Nov  4 10:14:13 IST 2004
Thu Nov  4 10:27:08 2004  -0.997689 seconds
Thu Nov  4 10:14:14 IST 2004
Thu Nov  4 10:27:09 2004  3.196611 seconds
Thu Nov  4 10:14:11 IST 2004
Thu Nov  4 10:27:10 2004  -0.506178 seconds
Thu Nov  4 10:14:11 IST 2004
Thu Nov  4 10:27:11 2004  -0.997682 seconds
Thu Nov  4 10:14:12 IST 2004
Thu Nov  4 10:27:12 2004  -0.997685 seconds
Thu Nov  4 10:14:13 IST 2004
Thu Nov  4 10:27:13 2004  -0.997692 seconds
Thu Nov  4 10:14:14 IST 2004
Thu Nov  4 10:27:14 2004  3.297907 seconds
Thu Nov  4 10:14:11 IST 2004
Thu Nov  4 10:27:15 2004  -0.997530 seconds
Thu Nov  4 10:14:12 IST 2004
Thu Nov  4 10:27:16 2004  -0.997701 seconds
Thu Nov  4 10:14:13 IST 2004
Thu Nov  4 10:27:17 2004  -0.997691 seconds
Thu Nov  4 10:14:14 IST 2004
Thu Nov  4 10:27:18 2004  3.196621 seconds
Thu Nov  4 10:14:11 IST 2004
Thu Nov  4 10:27:19 2004  -0.506174 seconds
Thu Nov  4 10:14:11 IST 2004
Thu Nov  4 10:27:20 2004  -0.997718 seconds
Thu Nov  4 10:14:12 IST 2004
Thu Nov  4 10:27:21 2004  -0.997686 seconds
Thu Nov  4 10:14:13 IST 2004
Thu Nov  4 10:27:22 2004  -0.997686 seconds
Thu Nov  4 10:14:14 IST 2004
Thu Nov  4 10:27:23 2004  3.688146 seconds
Thu Nov  4 10:14:10 IST 2004
Thu Nov  4 10:27:24 2004  -0.997684 seconds
Thu Nov  4 10:14:11 IST 2004
Thu Nov  4 10:27:25 2004  -0.997687 seconds
Thu Nov  4 10:14:12 IST 2004


List of modules inserted into the kernel:
i830                   78820  2 
ipv6                  264612  15 
parport_pc             35392  1 
lp                     11176  0 
parport                41832  2 parport_pc,lp
binfmt_misc            11688  1 
capability              4520  0 
commoncap               7232  1 capability
mousedev               10476  2 
usbmouse                5664  0 
intel_agp              22816  1 
agpgart                34696  3 intel_agp
ehci_hcd               32004  0 
uhci_hcd               33136  0 
usbcore               119012  5 usbmouse,ehci_hcd,uhci_hcd
e100                   32608  0 
mii                     5120  1 e100
rtc                    12760  0 
ext3                  127240  5 
jbd                    62616  1 ext3
mbcache                 9348  1 ext3
ide_generic             1408  0 
piix                   13440  1 
ide_disk               19296  7 
ide_core              139940  3 ide_generic,piix,ide_disk
sd_mod                 21696  0 
ata_piix                8164  0 
libata                 41604  1 ata_piix
scsi_mod              125196  2 sd_mod,libata
unix                   28692  343 
fbcon                  32100  71 
font                    8320  1 fbcon
vesafb                  6656  1 
cfbcopyarea             3840  1 vesafb
cfbimgblt               3040  1 vesafb
cfbfillrect             3776  1 vesafb

Output of lspci:
0000:00:00.0 Host bridge: Intel Corp. 82865G/PE/P DRAM Controller/Host-Hub
Interface (rev 02)
0000:00:02.0 VGA compatible controller: Intel Corp. 82865G Integrated Graphics
Device (rev 02)
0000:00:1d.0 USB Controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) USB UHCI #1
(rev 02)
0000:00:1d.1 USB Controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) USB UHCI #2
(rev 02)
0000:00:1d.2 USB Controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) USB UHCI #3
(rev 02)
0000:00:1d.3 USB Controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) USB UHCI #4
(rev 02)
0000:00:1d.7 USB Controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) USB2 EHCI
Controller (rev 02)
0000:00:1e.0 PCI bridge: Intel Corp. 82801 PCI Bridge (rev c2)
0000:00:1f.0 ISA bridge: Intel Corp. 82801EB/ER (ICH5/ICH5R) LPC Bridge (rev 02)
0000:00:1f.1 IDE interface: Intel Corp. 82801EB/ER (ICH5/ICH5R) Ultra ATA 100
Storage Controller (rev 02)
0000:00:1f.3 SMBus: Intel Corp. 82801EB/ER (ICH5/ICH5R) SMBus Controller (rev 02)
0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801EB/ER (ICH5/ICH5R)
AC'97 Audio Controller (rev 02)
0000:03:08.0 Ethernet controller: Intel Corp. 82562EZ 10/100 Ethernet Controller
(rev 02)

Comment 1 john stultz 2004-11-11 12:34:01 UTC

Could you try the patch attached to bug #2544 and see if it helps?

Comment 2 john stultz 2005-01-14 16:34:30 UTC

Any update on this bug?

Comment 3 Prasad 2005-01-18 20:58:17 UTC

sorry for taking time to reply.
but this seems to solve the problem.
Its already more than 2 days without any problem.

thanks and sorry for not responding earlier.

Comment 4 john stultz 2005-01-19 10:17:45 UTC


*** This bug has been marked as a duplicate of 2544 ***