Re: 2.5.72: wall-clock time advancing too rapidly?

Andy Pfiffer (andyp@osdl.org)
20 Jun 2003 16:28:25 -0700


On Fri, 2003-06-20 at 08:02, Andreas Haumer wrote:
> john stultz wrote:
> > On Thu, 2003-06-19 at 09:10, Andy Pfiffer wrote:

> >>By "racing ahead rapidly", I mean this:
> >>
> >> % date ; sleep 60 ; date
> >> Thu Jun 19 09:04:29 PDT 2003
> >> Thu Jun 19 09:05:29 PDT 2003
> >> %
> >>
> >>returns in 35 seconds (measured with my eyeballs and cheap wristwatch).
> >>

> > Well, variants on a theme. Can I get more hardware info? Is this a
> > laptop? Are we running w/ Speed Step?
> >
> I had this symptom recently on an Asus PR-DLS533 mainboard
> (ServerWorks GCLE chipset) with linux-2.4.21 and found out
> it happens only if I had BIOS "USB legacy support" enabled.
> As soon as I disabled this BIOS option, the phenomenon
> disappeard.

Update:

1) USB legacy support setting in the BIOS had no effect on the problem.
2) adding "clock=pit" (as suggested elsewhere) worked around the
problem.

So, does this fit the symptoms of:
http://bugme.osdl.org/show_bug.cgi?id=827

The system is not a laptop, and SpeedStep related issues should not be
messing things up here.

% cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 10
cpu MHz : 0.000
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov
pat pse36 mmx fxsr sse
bogomips : 794.62

% lspci
00:00.0 Host bridge: ServerWorks CNB20LE Host Bridge (rev 06)
00:00.1 Host bridge: ServerWorks CNB20LE Host Bridge (rev 06)
00:01.0 VGA compatible controller: S3 Inc. Savage 4 (rev 04)
00:02.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100]
(rev 08)
00:09.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100]
(rev 08)
00:0f.0 ISA bridge: ServerWorks OSB4 South Bridge (rev 50)
00:0f.1 IDE interface: ServerWorks OSB4 IDE Controller
00:0f.2 USB Controller: ServerWorks OSB4/CSB5 OHCI USB Controller (rev
04)
01:03.0 SCSI storage controller: Adaptec AIC-7892P U160/m (rev 02)

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/