brightness on lenovo ideapad

[Adrian Sevcenco]

Hi! I post here as i suspect that it is a kde problem with brightness settings:
while the keyboard special functions modify the setting in the Battery and Brightness tray
module,
the actual brightness is not modified, but i actually can modify the brightness using
xrandr.
Does anyone have any idea why the kde module does not use the xrandr mechanism?

Thank you!
Adrian

[Sérgio Basto]

On Mon, 2020-05-04 at 13:05 +0300, Adrian Sevcenco wrote:
>  Hi! I post here as i suspect that it is a kde problem with
> brightness
>  settings:
>  while the keyboard special functions modify the setting in the
>  Battery and Brightness tray module,
>  the actual brightness is not modified, but i actually can modify the
>  brightness using xrandr.
>  Does anyone have any idea why the kde module does not use the xrandr
>  mechanism? 

Power manager and "Display and Monitor" , what Fedora version are youusing ? 

Thanks


>  Thank you!
>  Adrian
>  
>  _______________________________________________
>  kde mailing list -- kde(a)lists.fedoraproject.org
>  To unsubscribe send an email to kde-leave(a)lists.fedoraproject.org
>  Fedora Code of Conduct: 
>  https://docs.fedoraproject.org/en-US/project/code-of-conduct/
>  List Guidelines: 
>  https://fedoraproject.org/wiki/Mailing_list_guidelines
>  List Archives: 
>  https://lists.fedoraproject.org/archives/list/[e-mail] 
-- 
Sérgio M. B.

[Adrian Sevcenco]

On 5/5/20 8:47 PM, Sérgio Basto wrote:
>  On Mon, 2020-05-04 at 13:05 +0300, Adrian Sevcenco wrote:
> > Hi! I post here as i suspect that it is a kde problem with brightness
> > settings:
> > while the keyboard special functions modify the setting in the
> > Battery and Brightness tray module,
> > the actual brightness is not modified, but i actually can modify the
> > brightness using xrandr.
> > Does anyone have any idea why the kde module does not use the xrandr
> > mechanism?
>  
>  
>  Power manager and "Display and Monitor" , what Fedora version are youusing ?
f31 updated

Thank you!
Adrian

[Sérgio Basto]

On Wed, 2020-05-06 at 15:56 +0300, Adrian Sevcenco wrote:
>  On 5/5/20 8:47 PM, Sérgio Basto wrote:
>  > On Mon, 2020-05-04 at 13:05 +0300, Adrian Sevcenco wrote:
>  > > Hi! I post here as i suspect that it is a kde problem with
>  > > brightness
>  > > settings:
>  > > while the keyboard special functions modify the setting in the
>  > > Battery and Brightness tray module,
>  > > the actual brightness is not modified, but i actually can modify
>  > > the
>  > > brightness using xrandr.
>  > > Does anyone have any idea why the kde module does not use the
>  > > xrandr
>  > > mechanism?
>  > 
>  > Power manager and "Display and Monitor" , what Fedora version are
>  > youusing ?
>  f31 updated 
I have IdeaPad L340 Gamming with f31 updated , and brightness works at
all places as expected 

>  
>  Thank you!
>  Adrian
>  
>  _______________________________________________
>  kde mailing list -- kde(a)lists.fedoraproject.org
>  To unsubscribe send an email to kde-leave(a)lists.fedoraproject.org
>  Fedora Code of Conduct: 
>  https://docs.fedoraproject.org/en-US/project/code-of-conduct/
>  List Guidelines: 
>  https://fedoraproject.org/wiki/Mailing_list_guidelines
>  List Archives: 
>  https://lists.fedoraproject.org/archives/list/[e-mail] 
-- 
Sérgio M. B.

[Adrian Sevcenco]

On 5/6/20 8:03 PM, Sérgio Basto wrote:
>  On Wed, 2020-05-06 at 15:56 +0300, Adrian Sevcenco wrote:
> > On 5/5/20 8:47 PM, Sérgio Basto wrote:
> >> On Mon, 2020-05-04 at 13:05 +0300, Adrian Sevcenco wrote:
> >>> Hi! I post here as i suspect that it is a kde problem with
> >>> brightness
> >>> settings:
> >>> while the keyboard special functions modify the setting in the
> >>> Battery and Brightness tray module,
> >>> the actual brightness is not modified, but i actually can modify
> >>> the
> >>> brightness using xrandr.
> >>> Does anyone have any idea why the kde module does not use the
> >>> xrandr
> >>> mechanism?
> >>
> >> Power manager and "Display and Monitor" , what Fedora version are
> >> youusing ?
> > f31 updated
>  
>  I have IdeaPad L340 Gamming with f31 updated , and brightness works at
>  all places as expected 
This is an C340 with Ryzen 7 3700U and i have:
[root@c340sev ~]# ls /sys/class/backlight/
amdgpu_bl0  ideapad

but the problem does not seem to be from the hardware support as xrandr 
brightness setting works, but the inability of kde power/battery widget 
to control it ...

Beside digging in code, does anyone know how the plasma widget try to 
control de brightness?

Thank you!
Adrian