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SubjectPROBLEM: Kernel loses time - 1 min each 10 minutes
[1.] One line summary of the problem:    

Kernel loses 1 minute per 10 minutes while buring CD's with xcdroast
(cdrecord).


[2.] Full description of the problem/report:

I burned several CD-Rs one night and noticed my two Linux boxes, which
sync periodically with the Navy's atomic clock, were over 30 minutes
apart. My SuSE box, with the CD-R, had lost time while burning CD-R's.
CD burning program is xcdroast, which uses cdrecord on the backend.


[3.] Keywords (i.e., modules, networking, kernel):

kernel, time


[4.] Kernel version (from /proc/version):

# cat /proc/version
Linux version 2.4.10-4GB (root@Pentium.suse.de) (gcc version 2.95.3
20010315 (SuSE)) #1 Fri Sep 28 17:20:21 GMT 2001


[5.] Output of Oops.. message (if applicable) with symbolic information
resolved (see Documentation/oops-tracing.txt)

N/A


[6.] A small shell script or example program which triggers the
problem (if possible)

See description (2. above).


[7.] Environment
[7.1.] Software (add the output of the ver_linux script here)

donelle:/usr/src/linux-2.4.10.SuSE # sh scripts/ver_linux
If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.

Linux donelle 2.4.10-4GB #1 Fri Sep 28 17:20:21 GMT 2001 i686 unknown

Gnu C 2.95.3
Gnu make 3.79.1
binutils 2.11.90.0.29
util-linux 2.11i
mount 2.11i
modutils 2.4.8
e2fsprogs 1.24a
reiserfsprogs 3.x.0k-pre9
PPP 2.4.1
Linux C Library x 1 root root 1384040 Jul 14 09:43
/lib/libc.so.6
Dynamic linker (ldd) 2.2.4
Procps 2.0.7
Net-tools 1.60
Kbd 1.04
Sh-utils 2.0
Modules Loaded st sg tuner tvaudio bttv i2c-algo-bit videodev
nls_iso8859-1 nls_cp437 via686a i2c-isa snd-pcm-oss snd-pcm-plugin
snd-mixer-oss ipt_MASQUERADE ipt_LOG ipt_limit ipt_REJECT ipt_state
iptable_nat ip_conntrack_ftp ip_conntrack iptable_filter ip_tables
i2c-proc i2c-core snd-seq-midi snd-seq-midi-event snd-seq
snd-card-ens1371 snd-ens1371 snd-pcm snd-timer snd-rawmidi
snd-seq-device snd-ac97-codec snd-mixer snd soundcore lp ipv6 vmnet
vmppuser parport_pc parport vmmon evdev input uhci usbcore 8139too
lvm-mod ext3 jbd ide-scsi


[7.2.] Processor information (from /proc/cpuinfo):

# cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 3
model name : AMD Duron(tm) Processor
stepping : 0
cpu MHz : 632.759
cache size : 64 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 mmx fxsr syscall mmxext 3dnowext 3dnow
bogomips : 1261.56


[7.3.] Module information (from /proc/modules):

# cat /proc/modules
st 25056 0 (autoclean) (unused)
sg 23328 0 (autoclean)
tuner 4496 1 (autoclean)
tvaudio 8128 0 (autoclean) (unused)
bttv 56176 0 (autoclean)
i2c-algo-bit 7040 1 (autoclean) [bttv]
videodev 4544 2 (autoclean) [bttv]
nls_iso8859-1 2880 1 (autoclean)
nls_cp437 4384 1 (autoclean)
via686a 8032 0 (unused)
i2c-isa 1200 0 (unused)
snd-pcm-oss 18368 1 (autoclean)
snd-pcm-plugin 14480 0 (autoclean) [snd-pcm-oss]
snd-mixer-oss 4768 2 (autoclean) [snd-pcm-oss]
ipt_MASQUERADE 1200 1 (autoclean)
ipt_LOG 3152 11 (autoclean)
ipt_limit 960 11 (autoclean)
ipt_REJECT 2784 35 (autoclean)
ipt_state 624 4 (autoclean)
iptable_nat 12656 0 (autoclean) [ipt_MASQUERADE]
ip_conntrack_ftp 3184 0 (unused)
ip_conntrack 12848 3 [ipt_MASQUERADE ipt_state iptable_nat
ip_conntrack_ftp]
iptable_filter 1728 0 (unused)
ip_tables 10496 9 [ipt_MASQUERADE ipt_LOG ipt_limit
ipt_REJECT ipt_state iptable_nat iptable_filter]
i2c-proc 5936 0 [via686a]
i2c-core 12288 0 [tuner tvaudio bttv i2c-algo-bit
via686a i2c-isa i2c-proc]
snd-seq-midi 3280 0 (unused)
snd-seq-midi-event 2800 0 [snd-seq-midi]
snd-seq 39584 0 [snd-seq-midi snd-seq-midi-event]
snd-card-ens1371 1984 3
snd-ens1371 9344 0 [snd-card-ens1371]
snd-pcm 29184 0 [snd-pcm-oss snd-pcm-plugin
snd-ens1371]
snd-timer 8336 0 [snd-seq snd-pcm]
snd-rawmidi 9312 0 [snd-seq-midi snd-ens1371]
snd-seq-device 3744 0 [snd-seq-midi snd-seq snd-rawmidi]
snd-ac97-codec 23456 0 [snd-ens1371]
snd-mixer 23488 0 [snd-mixer-oss snd-ens1371
snd-ac97-codec]
snd 31344 1 [snd-pcm-oss snd-pcm-plugin
snd-mixer-oss snd-seq-midi snd-seq-midi-event snd-seq snd-card-ens1371
snd-ens1371 snd-pcm snd-timer snd-rawmidi snd-seq-device snd-ac97-codec
snd-mixer]
soundcore 3280 5 [snd]
lp 5248 0 (autoclean)
ipv6 124736 -1 (autoclean)
vmnet 17152 6
vmppuser 6720 0 (unused)
parport_pc 19280 1
parport 22240 1 [lp vmppuser parport_pc]
vmmon 17920 3
evdev 4160 0 (unused)
input 3072 0 [evdev]
uhci 22400 0 (unused)
usbcore 47264 1 [uhci]
8139too 11936 1 (autoclean)
lvm-mod 45632 6 (autoclean)
ext3 61312 5
jbd 41504 5 [ext3]
ide-scsi 7552 0


[7.4.] Loaded driver and hardware information (/proc/ioports,
/proc/iomem)

# cat /proc/ioports
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
02f8-02ff : serial(auto)
0376-0376 : ide1
0378-037a : parport0
037b-037f : parport0
03c0-03df : vesafb
03f6-03f6 : ide0
03f8-03ff : serial(auto)
0cf8-0cff : PCI conf1
4000-40ff : PCI device 1106:3057
5000-500f : PCI device 1106:3057
6000-607f : PCI device 1106:3057
6000-607f : via686a-sensors
c000-c00f : PCI device 1106:0571
c000-c007 : ide0
c008-c00f : ide1
c400-c41f : PCI device 1106:3038
c400-c41f : usb-uhci
c800-c81f : PCI device 1106:3038
c800-c81f : usb-uhci
cc00-ccff : PCI device 10ec:8139
cc00-ccff : 8139too
d000-d03f : PCI device 1274:5880
d000-d03f : Ensoniq AudioPCI
d400-d407 : PCI device 1095:0649
d800-d803 : PCI device 1095:0649
dc00-dc07 : PCI device 1095:0649
e000-e003 : PCI device 1095:0649
e400-e40f : PCI device 1095:0649
e400-e407 : ide2
e408-e40f : ide3


# cat /proc/iomem
00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-2ffeffff : System RAM
00100000-002425c9 : Kernel code
002425ca-002a1d0b : Kernel data
2fff0000-2fff2fff : ACPI Non-volatile Storage
2fff3000-2fffffff : ACPI Tables
d0000000-d3ffffff : PCI device 1106:0305
d4000000-dbffffff : PCI Bus #01
d4000000-d7ffffff : PCI device 5333:8a13
d4000000-d43fffff : vesafb
dd000000-dd000fff : PCI device 109e:036e
dd000000-dd000fff : bttv
dd001000-dd001fff : PCI device 109e:0878
dd002000-dd0020ff : PCI device 10ec:8139
dd002000-dd0020ff : 8139too
ffff0000-ffffffff : reserved


[7.5.] PCI information ('lspci -vvv' as root)

# lspci -vvv
00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133]
(rev 02)
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR-
Latency: 0
Region 0: Memory at d0000000 (32-bit, prefetchable) [size=64M]
Capabilities: [a0] AGP version 2.0
Status: RQ=31 SBA+ 64bit- FW- Rate=x1,x2
Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP]
(prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR+
Latency: 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 0000f000-00000fff
Memory behind bridge: d4000000-dbffffff
Prefetchable memory behind bridge: fff00000-000fffff
BridgeCtl: Parity- SERR- NoISA+ VGA+ MAbort- >Reset- FastB2B-
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South]
(rev 22)
Subsystem: VIA Technologies, Inc. VT82C686/A PCI to ISA Bridge
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping+ SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0

00:07.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 10)
(prog-if 8a [Master SecP PriP])
Subsystem: VIA Technologies, Inc. Bus Master IDE
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32
Region 4: I/O ports at c000 [size=16]
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.2 USB Controller: VIA Technologies, Inc. UHCI USB (rev 10)
(prog-if 00 [UHCI])
Subsystem: Unknown device 0925:1234
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32, cache line size 08
Interrupt: pin D routed to IRQ 11
Region 4: I/O ports at c400 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.3 USB Controller: VIA Technologies, Inc. UHCI USB (rev 10)
(prog-if 00 [UHCI])
Subsystem: Unknown device 0925:1234
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32, cache line size 08
Interrupt: pin D routed to IRQ 11
Region 4: I/O ports at c800 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev
30)
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin ? routed to IRQ 9
Capabilities: [68] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:09.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139
(rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RT8139
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (8000ns min, 16000ns max)
Interrupt: pin A routed to IRQ 10
Region 0: I/O ports at cc00 [size=256]
Region 1: Memory at dd002000 (32-bit, non-prefetchable)
[size=256]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
PME(D0-,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable+ DSel=0 DScale=0 PME-

00:0a.0 Multimedia video controller: Brooktree Corporation Bt878 (rev
11)
Subsystem: Hauppauge computer works Inc. WinTV/GO
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (4000ns min, 10000ns max)
Interrupt: pin A routed to IRQ 5
Region 0: Memory at dd000000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data
Capabilities: [4c] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0a.1 Multimedia controller: Brooktree Corporation Bt878 (rev 11)
Subsystem: Hauppauge computer works Inc. WinTV/GO
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (1000ns min, 63750ns max)
Interrupt: pin A routed to IRQ 5
Region 0: Memory at dd001000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data
Capabilities: [4c] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0e.0 Multimedia audio controller: Ensoniq 5880 AudioPCI (rev 02)
Subsystem: Ensoniq Creative Sound Blaster AudioPCI128
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort-
<TAbort+ <MAbort+ >SERR- <PERR-
Latency: 64 (3000ns min, 32000ns max)
Interrupt: pin A routed to IRQ 5
Region 0: I/O ports at d000 [size=64]
Capabilities: [dc] Power Management version 1
Flags: PMEClk- DSI+ D1- D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:10.0 RAID bus controller: CMD Technology Inc PCI0649 (rev 01)
Subsystem: CMD Technology Inc PCI0649
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (500ns min, 1000ns max)
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at d400 [size=8]
Region 1: I/O ports at d800 [size=4]
Region 2: I/O ports at dc00 [size=8]
Region 3: I/O ports at e000 [size=4]
Region 4: I/O ports at e400 [size=16]
Expansion ROM at <unassigned> [disabled] [size=512K]
Capabilities: [60] Power Management version 2
Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=3 PME-

01:00.0 VGA compatible controller: S3 Inc. 86c368 [Trio 3D/2X] (rev 02)
(prog-if 00 [VGA])
Subsystem: S3 Inc. Trio3D/2X
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (1000ns min, 63750ns max)
Region 0: Memory at d4000000 (32-bit, non-prefetchable)
[size=64M]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [dc] Power Management version 1
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [80] AGP version 1.0
Status: RQ=31 SBA- 64bit- FW- Rate=x1,x2
Command: RQ=0 SBA- AGP- 64bit- FW- Rate=x2


[7.6.] SCSI information (from /proc/scsi/scsi)

# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: LITE-ON Model: LTR-0841 Rev: MS84
Type: CD-ROM ANSI SCSI revision: 02


[7.7.] Other information that might be relevant to the problem
(please look in /proc and include all information that you
think to be relevant):

When not using CD-R, system is usually only a few seconds off each week.


[X.] Other notes, patches, fixes, workarounds:
Workaround:
# while [ 1 ]; do sleep 1800; /etc/cron.weekly/settime; done

# cat /etc/cron.weekly/settime
#!/bin/bash

ntpdate tock.usno.navy.mil
hwclock --systohc
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