From: Pradeep Subrahmanion <subrahmanion.pradeep@gmail.com> To: Matthew Garrett <mjg@redhat.com> Cc: rpurdie@rpsys.net, FlorianSchandinat@gmx.de, akpm@linux-foundation.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] Added backlight driver for Acer Aspire 4736 Date: Tue, 13 Mar 2012 21:24:54 -0400 [thread overview] Message-ID: <1331688294.2577.19.camel@debian.Gayathri> (raw) In-Reply-To: <20120313133458.GA11574@srcf.ucam.org> On Tue, 2012-03-13 at 13:34 +0000, Matthew Garrett wrote: > 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? > 'intel_backlight' appears when i gave option acpi_backlight = vendor. Writing to /sys/class/backlight/intel_backlight/brightness does not cause any change in brightness. > > 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? No change in value when writing to /sys/class/backlight/acpi_video0/brightness. Another thing is that when i did boot with acpi_backlight = 'acer_wmi' , in new kernel (3.3.0-rc7) , it shows following messages , [ 8.350825] wmi: Mapper loaded [ 10.363975] acer_wmi: Acer Laptop ACPI-WMI Extras [ 10.396186] acer_wmi: Function bitmap for Communication Device: 0x91 [ 10.396385] acer_wmi: Brightness must be controlled by generic video driver Also there was no interface inside /sys/class/backlight for acer_wmi. I also tried writing directly to Embedded controller register .But no change. ---- Thanks , Pradeep Subrahmanion
WARNING: multiple messages have this Message-ID (diff)
From: Pradeep Subrahmanion <subrahmanion.pradeep@gmail.com> To: Matthew Garrett <mjg@redhat.com> Cc: rpurdie@rpsys.net, FlorianSchandinat@gmx.de, akpm@linux-foundation.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] Added backlight driver for Acer Aspire 4736 Date: Tue, 13 Mar 2012 15:49:32 +0000 [thread overview] Message-ID: <1331688294.2577.19.camel@debian.Gayathri> (raw) In-Reply-To: <20120313133458.GA11574@srcf.ucam.org> On Tue, 2012-03-13 at 13:34 +0000, Matthew Garrett wrote: > 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? > 'intel_backlight' appears when i gave option acpi_backlight = vendor. Writing to /sys/class/backlight/intel_backlight/brightness does not cause any change in brightness. > > 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? No change in value when writing to /sys/class/backlight/acpi_video0/brightness. Another thing is that when i did boot with acpi_backlight = 'acer_wmi' , in new kernel (3.3.0-rc7) , it shows following messages , [ 8.350825] wmi: Mapper loaded [ 10.363975] acer_wmi: Acer Laptop ACPI-WMI Extras [ 10.396186] acer_wmi: Function bitmap for Communication Device: 0x91 [ 10.396385] acer_wmi: Brightness must be controlled by generic video driver Also there was no interface inside /sys/class/backlight for acer_wmi. I also tried writing directly to Embedded controller register .But no change. ---- Thanks , Pradeep Subrahmanion
next prev parent reply other threads:[~2012-03-13 15:48 UTC|newest] Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <CABNxG=CU+bOWUauLYfcS2vtFqKvXA-9axgokNoYz+KuU1Mzztw@mail.gmail.com> 2012-03-11 19:42 ` [PATCH] Added backlight driver for Acer Aspire 4736 Florian Tobias Schandinat 2012-03-11 19:42 ` Florian Tobias Schandinat 2012-03-12 17:36 ` Pradeep Subrahmanion 2012-03-13 3:12 ` Pradeep Subrahmanion 2012-03-12 17:51 ` Matthew Garrett 2012-03-13 12:09 ` Pradeep Subrahmanion 2012-03-13 12:47 ` Matthew Garrett 2012-03-13 13:29 ` Pradeep Subrahmanion 2012-03-13 13:41 ` Pradeep Subrahmanion [not found] ` <CABNxG=Dqg26EHmC3vibf3-SjVhby1qgQfMniQObUeh9eJ6SwEw@mail.gmail.com> 2012-03-13 13:34 ` Matthew Garrett 2012-03-13 15:49 ` Pradeep Subrahmanion [this message] 2012-03-14 1:24 ` Pradeep Subrahmanion 2012-03-13 23:12 ` joeyli 2012-03-13 23:12 ` joeyli 2012-03-14 2:43 ` Pradeep Subrahmanion 2012-03-14 2:55 ` Pradeep Subrahmanion 2012-03-14 5:51 ` joeyli 2012-03-14 5:51 ` joeyli 2012-03-14 6:17 ` Pradeep Subrahmanion 2012-03-14 6:29 ` Pradeep Subrahmanion 2012-03-15 8:05 ` joeyli 2012-03-15 8:05 ` joeyli 2012-03-18 5:10 ` Pradeep Subrahmanion 2012-03-18 5:22 ` Pradeep Subrahmanion 2012-03-19 2:01 ` joeyli 2012-03-19 2:01 ` joeyli 2012-03-19 11:33 ` Pradeep Subrahmanion 2012-03-19 11:45 ` Pradeep Subrahmanion 2012-03-20 3:55 ` joeyli 2012-03-20 3:55 ` joeyli 2012-03-20 11:09 ` joeyli 2012-03-20 11:09 ` joeyli 2012-03-20 18:55 ` Pradeep Subrahmanion 2012-03-20 18:55 ` Pradeep Subrahmanion 2012-03-21 3:00 ` joeyli 2012-03-21 3:00 ` joeyli 2012-03-21 19:09 ` Pradeep Subrahmanion 2012-03-21 19:21 ` Pradeep Subrahmanion 2012-03-22 1:33 ` joeyli 2012-03-22 1:33 ` joeyli 2012-03-22 2:33 ` Pradeep Subrahmanion 2012-03-22 2:45 ` Pradeep Subrahmanion 2012-03-22 3:25 ` joeyli 2012-03-22 3:25 ` joeyli 2012-03-22 3:32 ` Pradeep Subrahmanion 2012-03-22 3:44 ` Pradeep Subrahmanion 2012-03-22 3:54 ` joeyli 2012-03-22 3:54 ` joeyli 2012-03-22 5:56 ` Pradeep Subrahmanion 2012-03-22 5:57 ` Pradeep Subrahmanion 2012-03-22 9:34 ` joeyli 2012-03-22 9:34 ` joeyli 2012-03-22 16:17 ` Pradeep Subrahmanion 2012-03-22 16:29 ` Pradeep Subrahmanion 2012-03-23 3:36 ` Pradeep Subrahmanion 2012-03-23 3:48 ` Pradeep Subrahmanion 2012-03-23 4:25 ` joeyli 2012-03-23 4:25 ` joeyli 2012-03-18 5:12 ` Pradeep Subrahmanion 2012-03-18 5:24 ` Pradeep Subrahmanion 2012-03-12 23:07 ` Joe Perches 2012-03-12 23:07 ` Joe Perches 2012-03-12 17:40 ` Pradeep Subrahmanion 2012-03-13 3:16 ` Pradeep Subrahmanion 2012-03-13 3:10 ` joeyli 2012-03-13 3:10 ` joeyli 2012-03-13 13:12 ` Pradeep Subrahmanion 2012-03-13 4:35 ` joeyli 2012-03-13 4:35 ` joeyli
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