[Bug 103781] Intel - display brightness control not working with i915.fastboot=1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103781

--- Comment #12 from Arthur Borsboom <arthurborsboom at gmail.com> ---
I have just tested the issue on the stable kernel on my laptop, since I do not
have the knowledge yet to use 'drm-tip'.

The issue seems to remain with kernel 4.18.5 with a small difference that the
screen does not turn black anymore, after pressing the Fn-Brightness down key
many times.

I have added the dmesg output with DRM debugging enabled.

Is this sufficient information or is more needed?

If the drm-tip usage is a necessity, please provide detailed step-by-step
instructions how to do that.

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