invert_brightness needed

[Jani Nikula]

On Fri, 11 Oct 2013, Jani Nikula <jani.nikula at linux.intel.com> wrote:
> On Thu, 10 Oct 2013, Fred New <fred.new2911 at gmail.com> wrote:
>> I have found that I need to use i915.invert_brightness=1 for my HP
>> Envy 17 with a Haswell processor (i7-4702MQ). The lspci command shows
>> the following information about this device:
>
> I am surprised... until recently [1] we've only seen this on gen4 Acer
> based laptops.
>
> Please file a new bug on DRM/Intel at [2], and attach the same info as
> requested in comment #1 of [1]. Thanks.

Fred, did you end up filing the bug? I don't think I saw one...

Please try video.use_bios_initial_backlight=0 module parameter (without
i915.invert_brightness). Does that help?

BR,
Jani.


>
> BR,
> Jani.
>
>
> [1] https://bugs.freedesktop.org/show_bug.cgi?id=70256
> [2] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI
>
>
>> $ lspci -v -s 00:02.0
>> 00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core
>> Processor Integrated Graphics Controller (rev 06) (prog-if 00 [VGA
>> controller])
>>     Subsystem: Hewlett-Packard Company Device 1968
>>     Flags: bus master, fast devsel, latency 0, IRQ 43
>>     Memory at d3000000 (64-bit, non-prefetchable) [size=4M]
>>     Memory at c0000000 (64-bit, prefetchable) [size=256M]
>>     I/O ports at 6000 [size=64]
>>     Expansion ROM at <unassigned> [disabled]
>>     Capabilities: <access denied>
>>     Kernel driver in use: i915
>>
>> Operating system information:
>>      Fedora 20 (beta)
>>      Linux kernel version 3.11.3
>>
>> Please let me know if you need any additional information.
>>
>> Best regards,
>> Fred New
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>
> -- 
> Jani Nikula, Intel Open Source Technology Center
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> dri-devel at lists.freedesktop.org
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-- 
Jani Nikula, Intel Open Source Technology Center