linux-kernel - Re: [PATCH] Added backlight driver for Acer Aspire 4736

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1332383623.2622.6.camel@debian.Gayathri>
Date:	Thu, 22 Mar 2012 08:03:43 +0530
From:	Pradeep Subrahmanion <subrahmanion.pradeep@...il.com>
To:	joeyli <jlee@...e.com>
Cc:	Matthew Garrett <mjg@...hat.com>, rpurdie@...ys.net,
	FlorianSchandinat@....de, akpm@...ux-foundation.org,
	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Added backlight driver for Acer Aspire 4736

On Thu, 2012-03-22 at 09:33 +0800, joeyli wrote:
> 於 四，2012-03-22 於 00:39 +0530，Pradeep Subrahmanion 提到：
> > > This new patch should remove acpi_video0 interface on your machine.
> > > Please kindly provide your dmidecode:
> > >  dmidecode > dmidecode.log
> > >
> > > And, 
> > > please make should the patch really applied, you can do a bit change on
> > > pr_info message by yourself.
> > 
> >    Sorry . I think there was some mistake . I tried the patch again. Now
> > I see only intel_backlight inside /sys/class/backlight. There is no
> > acer-wmi interface . Is this the expected behavior ? . Or am I missing
> > anything ?
> > 
> 
> Yes, this is the expected behavior! But, now I doubt your issue was
> workaround by acpi_osi=Linux but not intel_backlight.
>

> > 
> > 
> > > 
> > > > echo 5 > /sys/class/backlight/acpi_video0/brightness 
> > > > echo 5 > /sys/class/backlight/intel_backlight/brightness
> > > > 
> > > > But it doesn't make any change . 
> > > > 
> > > > In my case  , 'acpi_backlight = vendor' does not make any difference since the hot key control 
> > > > 
> > > > already starts working with 'acpi_osi=Linux' option.
> > > > 
> > > > cat /proc/cmdline gives , 
> > > > 
> > > > BOOT_IMAGE=/boot/vmlinuz-3.3.0+
> > > > root=UUID=f0197a59-c067-4fd8-ad90-c4d721816077 ro acpi_osi=Linux 
> > > > 
> > > > 
> > > > Thanks , 
> > > > 
> > > > Pradeep Subrahmanion
> > > > 
> > > 
> > > OK, that's more clearly, please remove acpi_osi=Linux then re-test, I
> > > think the hotkey of backlight control only works with acpi_osi=Linux ?
> > > 
> 
> Does your backlight control still work if you remove acpi_osi=Linux ?

   If I remove acpi_osi=Linux , the hot key control stops working .

> 
> 
> Thanks a lot!
> Joey Lee
> 

Thanks , 

Pradeep Subrahmanion


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/