From: Greg KH <greg@kroah.com>
To: Nikolai Kondrashov <spbnick@gmail.com>
Cc: Matthew Garrett <mjg@redhat.com>,
Randy Dunlap <rdunlap@xenotime.net>,
linux-kernel@vger.kernel.org,
platform-driver-x86@vger.kernel.org
Subject: Re: [PATCH] Platform: add Samsung Laptop platform driver
Date: Sun, 13 Mar 2011 09:17:53 -0700 [thread overview]
Message-ID: <20110313161752.GC10718@kroah.com> (raw)
In-Reply-To: <4D7C9668.3000902@gmail.com>
On Sun, Mar 13, 2011 at 12:03:20PM +0200, Nikolai Kondrashov wrote:
> Sometime ago I've found this hack on some forum, which I use currently
> to set the brightness:
>
> setpci -s 00:02.0 f4.b="$HEX_BYTE"
>
> It allows finer control of the brightness, but it seems it operates directly
> on the video card PCI register. I assume there is no sane way to use
> this interface from the platform driver, right?
Yes, do not do this, it causes all sorts of problems in the end, not the
least being the BIOS doesn't know what is going on at all as you are
changing the brightness without it knowing it.
thanks,
greg k-h
next prev parent reply other threads:[~2011-03-13 16:17 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-09 22:40 [PATCH] Platform: add Samsung Laptop platform driver Greg KH
2011-02-09 22:44 ` Randy Dunlap
2011-02-09 22:50 ` Greg KH
2011-02-09 22:58 ` Matthew Garrett
2011-02-09 22:50 ` Matthew Garrett
2011-02-09 23:02 ` Greg KH
2011-02-11 11:37 ` Richard Schütz
2011-02-11 15:22 ` Greg KH
2011-02-11 16:27 ` Richard Schütz
2011-02-25 21:01 ` Greg KH
2011-02-11 15:45 ` Matthew Garrett
2011-02-11 18:42 ` Greg KH
2011-02-16 10:06 ` Nikolai Kondrashov
2011-02-25 21:03 ` Greg KH
2011-02-25 21:49 ` Nikolai Kondrashov
2011-02-25 22:50 ` Greg KH
2011-03-10 7:00 ` Nikolai Kondrashov
2011-03-10 17:01 ` Greg KH
2011-03-10 17:13 ` Nikolai Kondrashov
2011-03-10 17:19 ` Greg KH
2011-03-10 17:28 ` Nikolai Kondrashov
2011-03-10 18:09 ` Greg KH
2011-03-10 21:05 ` Nikolai Kondrashov
2011-03-10 21:15 ` Greg KH
2011-03-11 7:12 ` Nikolai Kondrashov
2011-03-11 17:03 ` Greg KH
2011-03-11 19:07 ` Nikolai Kondrashov
2011-03-11 19:34 ` Greg KH
2011-03-11 20:20 ` Nikolai Kondrashov
2011-03-11 20:23 ` Nikolai Kondrashov
2011-03-11 20:35 ` Greg KH
2011-03-11 20:30 ` Greg KH
2011-03-13 10:03 ` Nikolai Kondrashov
2011-03-13 10:55 ` Richard Schütz
2011-03-13 13:02 ` Nikolai Kondrashov
2011-03-13 16:18 ` Greg KH
2011-03-13 17:49 ` Nikolai Kondrashov
2011-03-13 17:58 ` Greg KH
2011-03-13 16:17 ` Greg KH [this message]
2011-03-13 16:28 ` Matthew Garrett
2011-03-13 17:51 ` Nikolai Kondrashov
2011-03-13 17:50 ` Nikolai Kondrashov
-- strict thread matches above, loose matches on Subject: below --
2011-02-25 22:47 Greg KH
2011-02-27 15:36 Greg KH
2011-03-05 4:24 Greg KH
2011-03-11 17:43 ` Matthew Garrett
2011-03-11 19:35 ` Greg KH
2011-03-11 19:44 ` Matthew Garrett
2011-03-11 19:52 ` Greg KH
2011-03-11 19:55 ` Matthew Garrett
2011-03-14 15:18 ` Jörg-Volker Peetz
2011-03-11 17:57 Tommaso Massimi
2011-06-26 15:08 J Witteveen
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