linux-kernel - Re: [PATCH RESEND] ACPI: Blacklist Win8 OSI for some HP laptop 2013 models

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Date:	Tue, 14 Jan 2014 16:34:25 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Takashi Iwai <tiwai@...e.de>, Len Brown <lenb@...nel.org>,
	Oliver Neukum <oneukum@...e.de>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND] ACPI: Blacklist Win8 OSI for some HP laptop
 2013 models

On Tue, Jan 14, 2014 at 05:42:57PM +0100, Rafael J. Wysocki wrote:
> On Tuesday, January 14, 2014 04:12:44 PM Matthew Garrett wrote:
> > On Mon, Jan 13, 2014 at 12:14:18PM +0100, Takashi Iwai wrote:
> > > The BIOS on recent HP laptops behaves differently with Win8 OSI,
> > > e.g. no backlight control and no rfkill are available.  List them in
> > > the blacklist as a workaround.
> > 
> > What's the plan for fixing this properly?
> 
> What exactly do you mean by "fixing this properly"?

rfkill and backlight control presumably work fine under Windows 8, so 
there's obviously some new mechanism for doing so. HP will presumably 
ship more hardware that behaves this way, so if we don't add support for 
the new mechanisms then we'll just have to keep adding entries to the 
blacklist.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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