[Bug 200045] black screen on 'radeon' module probing

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=200045

--- Comment #3 from cerg2010cerg2010 at mail.ru ---
I did some more research and it turns out that 2) happens if I change
brightness level right after X starts, even in 4.15 kernel. If I wait a bit,
everything works good, including 4.17.1. Software I2C doesn't reproduce same
results, so I'm not sure if I should report 2) because it's stated that it can
cause issues, but with different kind of errors:

[drm] hw_i2c forced on, you may experience display detection problems!

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