From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Len Brown <lenb@kernel.org>
Cc: Linux Power Management List <linux-pm@lists.osdl.org>,
linux-pci@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] intel_idle: PCI quirk to prevent Lenovo Ideapad s10-3 boot hang
Date: Mon, 27 Sep 2010 14:57:35 +0100 [thread overview]
Message-ID: <20100927135735.GA856@srcf.ucam.org> (raw)
In-Reply-To: <alpine.LFD.2.00.1009242122390.8641@localhost.localdomain>
On Fri, Sep 24, 2010 at 09:26:31PM -0400, Len Brown wrote:
> From: Len Brown <len.brown@intel.com>
>
> When the Lenovo Ideapad S10-3 is booted with HT enabled,
> it hits a boot hang in the intel_idle driver.
>
> This occurs when entering ATM-C4 for the first time,
> unless BM_STS is first cleared.
>
> acpi_idle doesn't see this because it first checks
> and clears BM_STS, but it would hit the same hang
> if that check were disabled.
If there's hardware that expects BM_STS to be cleared, and if we've
previously always cleared BM_STS, shouldn't intel_idle be doing the same
thing?
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2010-09-27 13:57 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-25 1:26 [PATCH] intel_idle: PCI quirk to prevent Lenovo Ideapad s10-3 boot hang Len Brown
2010-09-27 13:57 ` Matthew Garrett [this message]
2010-09-30 22:14 ` Len Brown
2010-09-30 22:29 ` Matthew Garrett
2010-10-05 5:06 ` Len Brown
2010-10-05 11:40 ` Matthew Garrett
2010-10-16 8:25 ` Len Brown
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