[Bug 76217] xbacklight does not work properly after modifying PWM modulation frequency

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76217

Jani Nikula <jani.nikula at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to comment #0)
> In my case, I had to change the register 0xC8254 from its original value
> 0xD9C0D9C to 0x5730573 in order to have a PWM frequency of 700 Hz.
> 
> After I do the change, through the command
> intel_reg_write 0xC8254 0x5730573
> (part of the Intel GPU tools [3])
> xbacklight start to behave wrong.

This is a debugging tool. All bets are off if you fiddle with the registers
directly. We do not support this.

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