From: Stephen Hemminger <shemminger@osdl.org>
To: Jerry Cooperstein <coop@axian.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: seqlock/unlock(&xtime_lock) problems cause keyboard, time skew problems
Date: 18 Mar 2003 12:32:24 -0800 [thread overview]
Message-ID: <1048019543.6294.3.camel@dell_ss3.pdx.osdl.net> (raw)
In-Reply-To: <20030318190557.GA14447@p3.attbi.com>
On Tue, 2003-03-18 at 11:05, Jerry Cooperstein wrote:
> Since 2.5.60 my thinkpad keyboard repeat rate has been erratic when
> started up on battery power; plugging into AC after startup only makes
> it worse. Starting up on AC is fine. Compiling without apm in any
> form is fine.
>
> I posted on this a month ago and noone had solutions although I got
> several emails from folks with similarly afflicted machines.
>
> Since then I've noticed that I also get a bad time skew, with the
> system clock jumping forward.
>
> I'm pretty sure the problem arose with the introduction of the
> seqlock/unlock interface to protect xtime_lock instead of a regular rw
> lock. Short of trying to back the whole thing out, does any one have
> similar observations, suggestions, solutions?
Does this notebook vary the clock rate? If so then using TSC for
time of day clock is probably a problem. Try booting with notsc.
next prev parent reply other threads:[~2003-03-18 20:21 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-18 19:05 Jerry Cooperstein
2003-03-18 20:32 ` Stephen Hemminger [this message]
2003-03-18 20:59 ` Jerry Cooperstein
2003-03-18 23:34 ` john stultz
2003-03-19 0:21 ` Jerry Cooperstein
2003-03-19 0:38 ` [PATCH] boot time parameter to turn of TSC usage Stephen Hemminger
2003-03-19 0:39 ` Andrew Morton
2003-03-19 1:03 ` Stephen Hemminger
2003-03-18 23:57 ` seqlock/unlock(&xtime_lock) problems cause keyboard, time skew problems Stephen Hemminger
[not found] ` <1048022686.6291.6.camel@dell_ss3.pdx.osdl.net>
[not found] ` <20030318214101.GA4527@p3.attbi.com>
[not found] ` <1048025052.6294.16.camel@dell_ss3.pdx.osdl.net>
[not found] ` <20030318222313.GA4831@p3.attbi.com>
[not found] ` <1048027027.6297.33.camel@dell_ss3.pdx.osdl.net>
[not found] ` <20030318225801.GC4831@p3.attbi.com>
[not found] ` <1048030151.6297.71.camel@dell_ss3.pdx.osdl.net>
2003-03-19 0:27 ` Jerry Cooperstein
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