I915 did not work whit modset=1

[Jani Nikula]

On Mon, 30 Dec 2013, Jani Nikula <jani.nikula at linux.intel.com> wrote:
> On Mon, 23 Dec 2013, der-b <der-b at der-b.com> wrote:
>> Hello,
>>
>> i got a new Notebook with an Intel Core i7-3689Y whit a Intel HD 
>> Graphics 4000. I got a blank screen while booting but I could use ssh. 
>> This happened each time, when I enabled CONFIG_I915_KMS in the kernel 
>> config (modeset=1). Setting the option "invert_brightness=1" solved the 
>> problem.
>
> Hi Bernd -
>
> The i915.invert_brightness parameter has only ever been needed on some
> gen4 Acer laptops; I suspect this is something else.
>
> Please drop that parameter, and try one of the v3.13-rc kernels or
> video.use_bios_initial_backlight=0 module parameter.

For completeness, the reporter replied privately that
video.use_bios_initial_backlight=0 works.

Jani.


>
> If those don't help, please file a bug on Product=DRI,
> Component=DRM/Intel as instructed in [1].
>
> BR,
> Jani.
>
>
> [1] https://01.org/linuxgraphics/documentation/how-report-bugs
>
>>
>> I attached the "lspci -s 00:002 -nn -v" output.
>> I use the gentoo kernel 3.10.17.
>>
>> I hope this helps you a little bit.
>>
>> Kind regards,
>>
>> Bernd Lehmann
>>
>>
>> 00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core 
>> processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA 
>> controller])
>>      Subsystem: Lenovo Device [17aa:3977]
>>      Flags: bus master, fast devsel, latency 0, IRQ 42
>>      Memory at e0000000 (64-bit, non-prefetchable) [size=4M]
>>      Memory at d0000000 (64-bit, prefetchable) [size=256M]
>>      I/O ports at 2000 [size=64]
>>      Expansion ROM at <unassigned> [disabled]
>>      Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
>>      Capabilities: [d0] Power Management version 2
>>      Capabilities: [a4] PCI Advanced Features
>>      Kernel driver in use: i915
>>      Kernel modules: i915
>>
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>
> -- 
> Jani Nikula, Intel Open Source Technology Center
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-- 
Jani Nikula, Intel Open Source Technology Center