From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Garrett Date: Tue, 13 Mar 2012 13:34:59 +0000 Subject: Re: [PATCH] Added backlight driver for Acer Aspire 4736 Message-Id: <20120313133458.GA11574@srcf.ucam.org> List-Id: References: <1331608337.2267.67.camel@debian.Gayathri> <20120312175130.GA18002@srcf.ucam.org> <1331640592.3485.50.camel@debian.Gayathri> <20120313124738.GB10822@srcf.ucam.org> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Pradeep Subrahmanion Cc: rpurdie@rpsys.net, FlorianSchandinat@gmx.de, akpm@linux-foundation.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org On Tue, Mar 13, 2012 at 06:56:16PM +0530, Pradeep Subrahmanion wrote: > I tried giving acpi_backlight = vendor . In that case hot key for > brightness control is working. But i think , it is not calculating the > correct value for brightness because increasing brightness after maximum > level gives blank screen . Which backlight device appears then? > By ' ACPI interface' , I mean 'acpi_video0' inside the > /sys/class/backlight. I havn't tried the /sys/class/backlight interface > directly . I will try that also. So writing values into /sys/class/backlight/acpi_video0/brightness does nothing? -- Matthew Garrett | mjg59@srcf.ucam.org