[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-04-22 Thread Po-Hsu Lin
Closing this bug as per Mario's response in comment #19

** Changed in: linux (Ubuntu)
   Status: Confirmed => Fix Released

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Title:
  [Dell XPS 15 9575] Screen brightness stopped working with linux-
  image-5.4.0-9-generic

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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-03-25 Thread Mario Vukelic
The issue with the brightness slider not moving in the gnome panel menu, in 
response to brightness keys, was fixed after the latest round of updates that 
installed gnome-shell 3.36.
So all is good now on the Dell XPS 9575, thank you!

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
  image-5.4.0-9-generic

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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-03-21 Thread Olivier P
5.4.0-18-generic fixed it for me too (Dell XPS 13 9370) . Thanks !

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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-03-21 Thread Mario Vukelic
5.4.0-18-generic fixed it for me too (OP, Dell XPS 15 9575) as far as
the keyboard keys are concerned. The slider in the gnome panel however
is still not moved when I use the keyboard keys.

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-03-20 Thread Antti Salmela
Upgrade to 5.4.0-18-generic fixed this for me.

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-03-15 Thread Sergei Beilin
Dell Precision 5540, Linux liberty 5.4.0-14-generic #17-Ubuntu SMP Thu
Feb 6 22:47:59 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

- brightness keys do not work
- brigttness control from Xfce power applet does not work
- `xrandr --output eDP-1 --brightness 0.5` works unless `redshift` is running

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-03-06 Thread Mario Vukelic
As per prev. comment, the test kernel re-enables the keyboard brightness
setting. However, the slider in the Gnome panel menu is not being moved
when using the keyboard keys. Dragging the slider with the mouse does
change the brightness, though.

(May be related: The volume slider in the panel menu & the volume keys
show the same behaviour: the volume keys work but do not affect the
slider)

And by the way, the brightness problem also occurs on Asus Zenbook Flip
UX561UD, and the test kernel behaves in the same way, keys work but
slider unaffected.

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-03-05 Thread Mario Vukelic
OP here, test kernel works for me too

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-03-03 Thread Olivier P
Thanks , this test kernel fixes the issue with my XPS 9370 .

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-03-03 Thread AceLan Kao
Here is a new test kernel which not only revert the quirk, but introduce a new 
way to quirk the panels which support DPCD backlight
https://people.canonical.com/~acelan/bugs/lp1861521/

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-03-03 Thread Kai-Heng Feng
Same as #1864698?

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-03-03 Thread Maximilian Federle via ubuntu-bugs
Also failing on Dell XPS 13 9370, 5.4.0-17-generic

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-02-23 Thread Kyle Weber
Same here on a XPS 13 7390, 5.4.0-14-generic also.

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-02-18 Thread Olivier P
Same issue on a Dell XPS 13 9370.

Still occurs with linux-image-5.4.0-14-generic.

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-02-08 Thread Mario Vukelic
Still occurs with linux-image-5.4.0-12-generic
Now that apparently it was decided that Ubuntu 20.04 will use linux 5.4, it 
would be nice to fix it in 5.4 as well :)

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-01-25 Thread Pat Viafore
For those looking for a workaround in the meantime, I've found that
lxqt-config-brightness -i and lxqt-config-brightness -d on the command
line are still able to control the screen brightness in my setup.

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-01-10 Thread Mario Vukelic
Yes, this works again

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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[Bug 1858844] Re: [Dell XPS 15 9575] Screen brightness stopped working with linux-image-5.4.0-9-generic

2020-01-10 Thread Kai-Heng Feng
Please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.5-rc5

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  [Dell XPS 15 9575] Screen brightness stopped working with linux-
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