On Wed, 17 Jun 2015, Max Manheimer <stiltskin at 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
