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Re: Keyboard weirdness: keys get stuck

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[view original message]
From: Richard Jonsson <richie@...>
To: <linux-kernel@...>
Subject: Keyboard weirdness: keys get stuck
Date: Saturday, March 29, 2008 - 4:03 pm

With 2.6.25-rc6-git-something I have experienced stuck keys. When typing

a  sentence a character repeats aboooooooout 10 times, or as 'about'

above ;). I tested with a new kernel today, 2.6.25-rc7-git-something and

the problem is still present.


With 2.6.25-rc3 the keyboard is fine, and I've not tried with any kernel

in between.


As a side note, timestamps gets mixed up in dmesg output in a 1-2 second

span. Maybe related?


This is on a HP dv2140eu laptop, x86_64 SMP. Please cc me if you want

configuration details or testing to be done.


regards, Richard

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[view original message]
From: Richard Jonsson <richie@...>
To: <linux-kernel@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Saturday, March 29, 2008 - 6:39 pm

I should add that while watching a movie I noticed that video stutters

every now and then, on an irregular basis. It lasts for approx a second

each time.

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[view original message]
From: Richard Jonsson <richie@...>
To: <linux-kernel@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Sunday, March 30, 2008 - 6:09 am

Update


I've been trying to reproduce this bug all morning, and could not

reproduce it without firefox running. I then saw with dmesg that the

flash plugin had crashed:


[ 2170.872049] npviewer.bin[9053]: segfault at 0 ip f6dc9348 sp ffd3e788

error 4 in libflashplayer.so[f6d2c000+66b000]


This would explain why it can take several days between me experiencing

the bug, but it doesn't explain the mixed up timestamps in kern.log


Even if flash/npviewer is at fault, IMHO it shouldn't cause microlockups

that I experience


regards, Richard

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[view original message]
From: Jiri Kosina <jkosina@...>
To: Richard Jonsson <richie@...>
Cc: <linux-kernel@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Sunday, March 30, 2008 - 12:04 am

Hi Richard,


what does your .config look like? Do you have CONFIG_GCGROUP_SCHED

enabled? (please note that this is different from CONFIG_GROUP_SCHED). If

so, please try to reproduce without it.


--

Jiri Kosina

SUSE Labs


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[view original message]
From: Dhaval Giani <dhaval@...>
To: Jiri Kosina <jkosina@...>
Cc: Richard Jonsson <richie@...>, <linux-kernel@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Sunday, March 30, 2008 - 5:23 am

CGROUP_SCHED depends on GROUP_SCHED. The stutters are not due to the

group scheduling extensions. (or the scheduler AFAICT).


Thanks,

--

regards,

Dhaval

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[view original message]
From: Richard Jonsson <richie@...>
To: Jiri Kosina <jkosina@...>
Cc: <linux-kernel@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Sunday, March 30, 2008 - 3:45 am

There is no such thing in my config at all, at least not with

CONFIG_GROUP_SCHED disabled. If you meant CONFIG_CGROUP_SCHED it was not

enabled at any time. Config attached


regards, Richard
[view original message]
From: Dhaval Giani <dhaval@...>
To: Richard Jonsson <richie@...>
Cc: <linux-kernel@...>, Srivatsa Vaddagiri <vatsa@...>, Peter Zijlstra <a.p.zijlstra@...>, Ingo Molnar <mingo@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Saturday, March 29, 2008 - 7:43 pm

Can you check if you have CONFIG_GROUP_SCHED enabled? If so, can you

disable and test?


Thanks,

--

regards,

Dhaval

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[view original message]
From: Richard Jonsson <richie@...>
To: Dhaval Giani <dhaval@...>
Cc: <linux-kernel@...>, Srivatsa Vaddagiri <vatsa@...>, Peter Zijlstra <a.p.zijlstra@...>, Ingo Molnar <mingo@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Saturday, March 29, 2008 - 8:01 pm

Yes it's enabled, will try without groupsched.


regards, Richard

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[view original message]
From: Richard Jonsson <richie@...>
To: Dhaval Giani <dhaval@...>
Cc: <linux-kernel@...>, Srivatsa Vaddagiri <vatsa@...>, Peter Zijlstra <a.p.zijlstra@...>, Ingo Molnar <mingo@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Saturday, March 29, 2008 - 8:46 pm

Same behavior without group_sched


regards, Richard

--
[view original message]
From: Dhaval Giani <dhaval@...>
To: Richard Jonsson <richie@...>
Cc: <linux-kernel@...>, Srivatsa Vaddagiri <vatsa@...>, Peter Zijlstra <a.p.zijlstra@...>, Ingo Molnar <mingo@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Sunday, March 30, 2008 - 5:33 am

Is it easy to reproduce? Would it be possible for you to bisect?


Thanks,

--

regards,

Dhaval

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[view original message]
From: Richard Jonsson <richie@...>
To: Dhaval Giani <dhaval@...>
Cc: <linux-kernel@...>, Srivatsa Vaddagiri <vatsa@...>, Peter Zijlstra <a.p.zijlstra@...>, Ingo Molnar <mingo@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Sunday, March 30, 2008 - 6:56 am

I have a pretty good idea how to trigger it now, but it still takes some

time of typing to actually see it. It's easy to see if it fails, but not

the other way around.


I will give it a try to at least narrow it down, but it will take some

time..


regards, Richard

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[view original message]
From: Rafael J. Wysocki <rjw@...>
To: Richard Jonsson <richie@...>
Cc: <linux-kernel@...>, Andrew Morton <akpm@...>, Ingo Molnar <mingo@...>, Peter Zijlstra <peterz@...>, Thomas Gleixner <tglx@...>, Linus Torvalds <torvalds@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Saturday, March 29, 2008 - 5:46 pm

This doesn't sound good at all.


Ingo, Thomas, are there any obvious candidates in the x86 and/or scheduler area

that might cause it to happen?


Rafael

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[view original message]
From: Rene Herman <rene.herman@...>
To: Richard Jonsson <richie@...>
Cc: <linux-kernel@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Saturday, March 29, 2008 - 5:22 pm

Does the weirdness persist if you boot with "io_delay=0x80" as a kernel

parameter? (it should if -rc3 really was fine, but...)


Rene.

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[view original message]
From: Richard Jonsson <richie@...>
To: Rene Herman <rene.herman@...>
Cc: <linux-kernel@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Saturday, March 29, 2008 - 6:11 pm

I'm testing that param at the moment, and while writing this response it

happened again, meaning it didn't change anything..


I can't say for sure rc3 wasn't affected, I just never noticed the

behavior during the 2-3 weeks I used it.


regards, Richard

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[view original message]
From: Rene Herman <rene.herman@...>
To: Richard Jonsson <richie@...>
Cc: <linux-kernel@...>
Subject: Re: Keyboard weirdness: keys get stuck
Date: Saturday, March 29, 2008 - 6:24 pm

Haven't been following the list lately, but I believe I read something about

a scheduler / X.org interaction problem. Afraid that's all from me though...


Rene.

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Previous thread: [git patches] libata fixes by Jeff Garzik on Saturday, March 29, 2008 - 4:09 pm. (1 message)

Next thread: fix comments in sound/core.h by Pavel Machek on Saturday, March 29, 2008 - 4:55 pm. (1 message)