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From: Panagiotis Papadakos <papadako@ics.forth.gr>
To: linux-acpi@vger.kernel.org
Subject: Re: Sony CR21/Z laptop (Latency problems related to ACPI?)
Date: Mon, 23 Apr 2012 22:37:56 +0300	[thread overview]
Message-ID: <3016996.TpuJ1apcko@cray-7> (raw)
In-Reply-To: <5612856.clGBGkmtMC@cray-7>

Well, it seems that I only need noapic in my kernel options.
Also I guess this is a motherboard or BIOS bug right?

Thanks in advance.

On Monday 23 of April 2012 15:18:48 Panagiotis Papadakos wrote:
> Hello.
> 
> I have been using a cr21/z laptop which probably has
> acpi related problems that introduce latency. I noticed
> it because a recent update in my Ubuntu precise
> makes my system's clock stay behind, and freezes
> my laptop when there are no mouse or keyboard actions.
> 
> Somehow it looks related to
> https://bugzilla.kernel.org/show_bug.cgi?id=20172
> 
> If I boot my kernel with noapictimer clocksource=jiffies irqpoll
> options the system reacts to my actions instantly. It is the first
> time that I have exprerience lag free reactions from my system.
> Unfortunately there are spikes of 100% CPU usage, due to irq polling I
> assume, which makes my system less power efficient.
> 
> Is there any case that we can somehow fix this problem?
> 
> I am using latest git kernel. The same problem also exists
> in current Ubuntu precise 3.2 kernel.
> 
> Thank you in advance.
> 
> Panagiotis Papadakos

      reply	other threads:[~2012-04-23 19:38 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-23 12:18 Sony CR21/Z laptop (Latency problems related to ACPI?) Panagiotis Papadakos
2012-04-23 19:37 ` Panagiotis Papadakos [this message]

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