linux-kernel - Re: [2.6.25-rc1] jerky mouse cursor and randoooom key repeats

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Message-Id: <1204070885.30875.37.camel@laptop.nigel.suspend2.net>
Date:	Wed, 27 Feb 2008 11:08:05 +1100
From:	Nigel Cunningham <ncunningham@...a.org.au>
To:	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>
Cc:	Jiri Kosina <jkosina@...e.cz>,
	Chris Holvenstot <cholvenstot@...cast.net>, elendil@...net.nl,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>,
	Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [2.6.25-rc1] jerky mouse cursor and randoooom key repeats

Hi.

On Tue, 2008-02-26 at 17:04 -0500, Lennart Sorensen wrote:
> On Tue, Feb 26, 2008 at 11:01:55PM +0100, Jiri Kosina wrote:
> > OK, so what very probably happened is that CONFIG_GROUP_SCHED somehow 
> > schedules X server in a way which confuses its sense of time, and 
> > therefore makes autorepeat buggy ... ?
> 
> Well in my case this has been happening quite a long time, and I am
> currently running 2.6.22 from Debian and I don't see any such config
> option in the config.
> 
> $ grep SCHED /boot/config-2.6.22-3-k7
> CONFIG_IOSCHED_NOOP=y
> CONFIG_IOSCHED_AS=y
> CONFIG_IOSCHED_DEADLINE=y
> CONFIG_IOSCHED_CFQ=y
> CONFIG_DEFAULT_IOSCHED="cfq"
> CONFIG_SCHED_SMT=y
> CONFIG_SCHED_MC=y
> CONFIG_NET_SCHED=y
> # CONFIG_USB_EHCI_TT_NEWSCHED is not set
> # CONFIG_SCHEDSTATS is not set
> 
> So no idea what could have started the problem originally.  I guess I
> have to start booting some older kernels and seeing if that helps.

I saw it this morning with 2.6.23.14. It was find for ages, and seems to
be okay again now. Not sure what triggered it though.

nigel@...top:/usr/src/redhat/BUILD/kernel-2.6.23/build-2.6.23.x86_64$
grep SCHED .config
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
CONFIG_DEFAULT_IOSCHED="cfq"
CONFIG_SCHED_SMT=y
CONFIG_SCHED_MC=y
# CONFIG_NET_SCHED is not set
CONFIG_USB_EHCI_TT_NEWSCHED=y
CONFIG_SCHED_DEBUG=y
CONFIG_SCHEDSTATS=y

(Old Redhat tree with TuxOnIce applied; I'm running F8 with all current
updates applied).

Nigel

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