Kernel Boot Option Question

[Ben Hutchings]

On Fri, 2011-02-25 at 17:42 -0500, Joseph Salisbury wrote:
> On 02/25/2011 05:23 PM, Herton Ronaldo Krzesinski wrote:
> > On Fri, Feb 25, 2011 at 04:25:56PM -0500, Joseph Salisbury wrote:
> >> Hello,
> >>
> >> There seems to be an issue when a motherboards CMOS clock reports a time
> >> and date older than the one that was recorded during the last successful
> >> boot.  When this happens the system will fail to boot.
> >>
> >> Is there a way to get the kernel to ignore a bad date and time from the
> >> BIOS at boot up, or an option to disable this check entirely?
> > 
> > Well, just the fact of CMOS clock going backwards causing a subsequent
> > boot to fail is odd, it shouldn't happen and I think it's not the real
> > cause, may be a side effect of another issue.
> > 
> > Do you have more details about the issue and machine where this happens,
> > environment, etc.?
> 
> It happens on all the machines I've tried.  The one I have next to me is
> a netbook running Natty, but this also happens on Maverick and Lucid.
> It appears to be related to fsck.  I changed the date in my bios to be a
> month ahead, it boots once, but then a reboot triggers the fsck and the
> system then hangs.  Attached is a screen shot from a system having this
> issue.
> 
> The easy solution is to ensure the bios clock is set properly.  I was
> wondering if there is a boot option to disable the kernel from checking
> the bios clock, but maybe this needs to be done for specific reasons.

This looks like a regression in e2fsck.  It never used to treat this
sort of time anomaly as requiring manual attention.

(Also, it's crazy that fsck is not called with the -y option by default.
Only a tiny minority of users know enough to make better choices than
just saying yes to everything.)

Ben.

-- 
Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 828 bytes
Desc: This is a digitally signed message part
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20110226/55d56424/attachment.sig>