[Bug 1890055] Re: Brightness control does not work with 5.4.0-42.26

2020-10-04 Thread Launchpad Bug Tracker
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
   Status: Incomplete => Expired

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Title:
  Brightness control does not work with 5.4.0-42.26

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[Bug 1890055] Re: Brightness control does not work with 5.4.0-42.26

2020-08-05 Thread Alex Hung
You can also try to verify sysfs interfaces such as below example

$ ls /sys/class/backlight/
intel_backlight
$ cd /sys/class/backlight/intel_backlight
$ cat max_brightness 
12
$echo 12 | sudo tee brightness
$echo 6 | sudo tee brightness

If this does not change brightness, something is wrong with VGA (or
BIOS) brightness interfaces.

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Title:
  Brightness control does not work with 5.4.0-42.26

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[Bug 1890055] Re: Brightness control does not work with 5.4.0-42.26

2020-08-04 Thread Po-Hsu Lin
Hello, 
3 questions here:
 1. Can you adjust the screen brightness with the hotkeys?
 2. Can you adjust the screen brightness with the slide bar in Settings -> 
Power?
 3. If not, does it work for you with these 2 methods above on older kernels 
(and which version)?

Thanks

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

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Title:
  Brightness control does not work with 5.4.0-42.26

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[Bug 1890055] Re: Brightness control does not work with 5.4.0-42.26

2020-08-04 Thread Po-Hsu Lin
** Summary changed:

- linux-image-5.4.0-42-generic 5.4.0-42.26
+ Brightness control does not work with 5.4.0-42.26

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Title:
  Brightness control does not work with 5.4.0-42.26

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