From: Fabio Coatti <fabio.coatti@gmail.com>
To: Tom St Denis <tstdenis@elliptictech.com>, linux-kernel@vger.kernel.org
Subject: Re: 3.7.X vs 3.6.11 HP Folio 9470m brightness regression?
Date: Thu, 20 Dec 2012 10:27:57 +0100 [thread overview]
Message-ID: <1425298.zMcaSB7taE@calvin> (raw)
In-Reply-To: <1520620637.200975.1355955029721.JavaMail.root@elliptictech.com>
In data mercoledì 19 dicembre 2012 17:10:29, hai scritto:
> ----- Original Message -----
>
> > From: "Fabio Coatti" <fabio.coatti@gmail.com>
> > To: linux-kernel@vger.kernel.org
> > Sent: Wednesday, 19 December, 2012 5:01:30 PM
> > Subject: 3.7.X vs 3.6.11 HP Folio 9470m brightness regression?
> >
> > Hi,
> > I'm testing kernels 3.7.X vs 3.6.11 on an HP Folio 9470m machine,
> > i915
> > driver for a VGA compatible controller: Intel Corporation 3rd Gen
> > Core
> > processor Graphics Controller (rev 09) 8086:0166
> >
> > With 3.6.11, the brightness can be correctly set using fn+f9/10: kde
> > shows the bar and brightness changes.
> >
> > With 3.7.1 kde shows the percentage bar and
> > /sys/class/backlight/acpi_video0/brightness is updated, but the
> > screen
> > brightness does not changes.
>
> I had a similar problem with my Dell laptop and i915/acpi...
>
> Is there another acpi_video? device? In my case two showed up in 3.7
> whereas in 3.6 there was one. In 3.7 it was controlling the wrong one
> apparently.
Well, this seems not to be the case, I have only one acpi_video:
calvin ~ # ls -l /sys/class/backlight/
totale 0
lrwxrwxrwx 1 root root 0 20 dic 09.20 acpi_video0 ->
../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video0
calvin ~ # ls -l /sys/devices/pci0000:00/0000:00:02.0/backlight
totale 0
drwxr-xr-x 3 root root 0 20 dic 09.20 acpi_video0
--
Fabio
next prev parent reply other threads:[~2012-12-20 9:34 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-19 22:01 3.7.X vs 3.6.11 HP Folio 9470m brightness regression? Fabio Coatti
2012-12-19 22:10 ` Tom St Denis
2012-12-20 9:27 ` Fabio Coatti [this message]
2013-01-12 11:22 ` Fabio Coatti
2013-01-12 12:42 ` Daniel Vetter
2013-01-12 20:35 ` Fabio Coatti
2013-01-14 8:13 ` Fabio Coatti
2013-01-14 9:50 ` joeyli
2013-01-14 11:26 ` Fabio Coatti
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