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Old 12-01-2019, 05:54 PM   #1
porphyry5
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Registered: Jul 2010
Location: oregon usa
Distribution: Slackware 14.1, Arch
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screen brightness cannot adjust


N.B. Did not get this problem solved, abandoned the install of openSUSE instead.
I have installed openSUSE Leap 15.1 on an acer c720 chromebook and cannot adjust the screen brightness, neither by function keys nor the following.
Code:
~ $ xbacklight
No outputs have backlight property
~ $ cat /sys/class/backlight/acpi_video0/brightness
cat: /sys/class/backlight/acpi_video0/brightness: No such file or directory
Fromhttps://forums.opensuse.org/showthre...ss-in-openSUSE I also tried adding
Code:
acpi_osi=\"!Windows 2012\"
at the end of '/etc/sysconfig/bootloader', and rebooted. All to no effect.

Last edited by porphyry5; 12-04-2019 at 05:13 PM. Reason: No longer trying to install openSUSE on this machine
 
Old 12-03-2019, 03:32 AM   #2
evo2
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Registered: Jan 2009
Location: Japan
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Hi,

why did you assume "acpi_video0" was correct? Did you check other other directories under /sys/class/backlight/?

Evo2.
 
1 members found this post helpful.
Old 12-04-2019, 05:10 PM   #3
porphyry5
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Registered: Jul 2010
Location: oregon usa
Distribution: Slackware 14.1, Arch
Posts: 474

Original Poster
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Quote:
Originally Posted by evo2 View Post
Hi,

why did you assume "acpi_video0" was correct? Did you check other other directories under /sys/class/backlight/?

Evo2.
Actually, habit, because that is its location on the laptop I'm phasing out. Thank you for your help, but I have now managed a successful install of arch on the new laptop, so I'm deferring working on openSUSE until I have all the little details worked out on the new machine. I can't mark this thread as SOLVED, so I'll try to edit my 1st post to show it is suspended. Or perhaps a moderator could delete the entire thread?
 
  


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