Comment 5 for bug 1802669

The issue started happening after the use of an pre-installed harddrive
(with 16.04/unity) which i'd put in another noetebook: hardware change
from a asus P55 to a X55U. After that i started the usual udate & upgrade.

Last notice: i tried out to install a second (mate) desktop environment
... and to my suprise the brightness-function worked (16.04.5). Even the
FN+F5/F6 procedure works during the boot-procedure and stayed till the
restart (with unity) - changes are not possible in that case.

I'll try out your method and see/report what will happen ...

best

RRS

Am 15.11.18 um 22:06 schrieb Joseph Salisbury:
> Did this issue start happening after an update/upgrade? Was there a
> prior kernel version where you were not having this particular problem?
>
> Would it be possible for you to test the latest upstream kernel? Refer
> to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
> v4.20 kernel[0].
>
> If this bug is fixed in the mainline kernel, please add the following
> tag 'kernel-fixed-upstream'.
>
> If the mainline kernel does not fix this bug, please add the tag:
> 'kernel-bug-exists-upstream'.
>
> Once testing of the upstream kernel is complete, please mark this bug as
> "Confirmed".
>
>
> Thanks in advance.
>
> [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.20-rc2
>
> ** Changed in: linux (Ubuntu)
> Importance: Undecided => Medium
>
> ** Changed in: linux (Ubuntu)
> Status: Confirmed => Incomplete
>