From: Jani Nikula <jani.nikula@linux.intel.com>
To: Max Manheimer <stiltskin@ymail.com>, dri-devel@lists.freedesktop.org
Subject: Re: inverted brightness for HP notebook
Date: Thu, 18 Jun 2015 09:19:00 +0300 [thread overview]
Message-ID: <87oakdilnv.fsf@intel.com> (raw)
In-Reply-To: <loom.20150617T163520-295@post.gmane.org>
On Wed, 17 Jun 2015, Max Manheimer <stiltskin@ymail.com> wrote:
> Hi,
>
> Jani Nikula <jani.nikula <at> linux.intel.com> writes:
>
>> On Thu, 13 Nov 2014, olivier.fambon <at> free.fr wrote:
>
>>> $ lspci | grep VGA
>>> 00:02.0 VGA compatible controller: Intel Corporation ValleyView Gen7 (rev 0e)
>
>>> $ sudo lspci -v -s 00:02
>>> 00:02.0 VGA compatible controller: Intel Corporation ValleyView Gen7 (rev
> 0e) (prog-if 00 [VGA controller])
>>> Subsystem: Hewlett-Packard Company Device 2213
>>> Flags: bus master, fast devsel, latency 0, IRQ 107
>>> Memory at 90000000 (32-bit, non-prefetchable) [size=4M]
>>> Memory at 80000000 (32-bit, prefetchable) [size=256M]
>>> I/O ports at 3050 [size=8]
>>> Expansion ROM at <unassigned> [disabled]
>>> Capabilities: [d0] Power Management version 2
>>> Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
>>> Capabilities: [b0] Vendor Specific Information: Len=07 <?>
>>> Kernel driver in use: i915
>
>>> => requires the following to make brightness control keys work as expected
>
>>> $ cat /etc/modprobe.d/i915.conf
>>> options i915 invert_brightness=1
>
> As there's a specific broadwell i915 module, you have to adapt as follows:
>
> options i915_bdw invert_brightness=1
>
>> I highly doubt this. This might be true for some gen4 models, but not
>> Valleyview.
>
> The above mentioned i915_bdw option fixes the backlight inversion on my HP
> 250 G3 (same lspci output as in original post)
i915_bdw is an Ubuntu thing, upstream has nothing to do with it. But I'm
surprised they'd use i915_bdw for a Baytrail/Valleyview.
If you can reproduce with the upstream driver, please file a bug at [1].
BR,
Jani.
[1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel
--
Jani Nikula, Intel Open Source Technology Center
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prev parent reply other threads:[~2015-06-18 6:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1487587494.280244480.1415843877885.JavaMail.root@spooler1-g27.priv.proxad.net>
2014-11-13 2:11 ` inverted brightness for HP notebook olivier.fambon
2014-11-13 12:30 ` Jani Nikula
2015-06-17 14:44 ` Max Manheimer
2015-06-18 6:19 ` Jani Nikula [this message]
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