[Bug 111202] Intel_backlight fails to change eDP1 brightness on Dell Precision 5540 (Coffeelake)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111202

Lakshmi <lakshminarayana.vudum at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|medium                      |high
         Whiteboard|                            |ReadyForDev, Triaged
            Summary|[Regression]:               |Intel_backlight fails to
                   |intel_backlight fails to    |change eDP1 brightness on
                   |change eDP1 brightness on   |Dell Precision 5540
                   |Dell Precision 5540         |(Coffeelake)
                   |(Coffeelake)                |

--- Comment #6 from Lakshmi <lakshminarayana.vudum at intel.com> ---
(In reply to Arcadiy Ivanov from comment #5)
> I put a "regression" in the title, because I took an SSD from Dell Precision
> 7510, put it in Dell Precision 5540 and observed that backlight stopped
> working - i.e. something that was working stopped. There is nothing to
> bisect, because the loss of functionality occurred with device upgrade, not
> kernel version upgrade.
> 
> Also, this is Fedora 30, not Ubuntu.

Acradiy, Regression gives an impression that the issue has come up after
upgrading the kernel, which is not in this case. 

So, I would like to remove that from the title. 

Btw, before setting up the SSD to Dell Precision 5540 machine(CFL), have you
noticed this issue on CFL?

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