Re: [BUG 2.6.20-rc2] atkbd.c: Spurious ACK

From: Rene Herman
Date: Thu Dec 28 2006 - 16:47:00 EST

Dave Jones wrote:

On Wed, Dec 27, 2006 at 10:32:53PM +0100, Rene Herman wrote:

The bug where the kernel repetitively emits "atkbd.c: Spurious ACK
on isa0060/serio0. Some program might be trying access hardware
directly" (sic) on a panic, thereby scrolling away the information
that would help in seeing what exactly the problem was (ie, "Unable
to mount root fs" or something) is still present in 2.6.20-rc2.

Do you have a KVM ? Quite a few of those seem to tickle this printk.

No, regular old PS/2 keyboard, directly connected. Due to that exact uneventfullness and having seen it reported before recently (*) I assumed everyone was seeing this. If not, I guess I can try to narrow it down.

It's easy to test for anyone willing: just boot with "root=/dev/null" or something as a kernel param. The printk's are in sync with the panic code blinking the leds.

(*) Here there was supposed to be a link to the post I was refferring to, but googling for it led to

Dmitry, could you ask Linus to pull the change? I find this to be an exceedingly annoying bug. It's just so incredibly silly, having one part of the kernel helpfully blink leds at you with another part going "hey, dude! don't do that!"

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