As a followup, using the function keys for brightness (in my case: fn+Alt+F5 or F6) seems to be remembered. So, at least for me, there is a workaround.
ON the same computer, xbacklight was working well with Knoppix 7.4 and 7.6.
It is not working for Knoppix 7.7.1. The command:
returns:Code:xbacklight -get
Code:No outputs have backlight property
As a followup, using the function keys for brightness (in my case: fn+Alt+F5 or F6) seems to be remembered. So, at least for me, there is a workaround.
The "No outputs have backlight property" error is apparently because xbacklight does not choose the right directory in /sys/class/backlight. Running:
shows that directory is named intel_backlight.Code:ls /sys/class/backlight
We should then be able to specify the directory by setting the Backlight option of the device in xorg.conf, configuring the section "Device" as follows:
Code:/etc/X11/xorg.conf Section "Device" Identifier "Card0" Driver "intel" Option "Backlight" "intel_backlight" EndSection
Last edited by philo; 11-03-2016 at 08:20 PM.
Actually only these 2 lines need to be inserted:
Should also have mentioned the link for the solution to that issue:Code:Driver "intel" Option "Backlight" "intel_backlight"
https://wiki.archlinux.org/index.php...ght#xbacklight
Last edited by philo; 11-13-2016 at 03:09 PM.
Dell PowerEdge R640 NVMe Server 2.10Ghz 8-Core 96GB 10x 1.6TB NVMe SSD HBA330
$3133.65
Apple iMac 24" (256GB SSD, M1, 8GB, 8-Core GPU) Yellow - MGPF3LL/A - LOCKED
$450.00
Intel - Core i7-13700K 13th Gen 16 cores 8 P-cores + 8 E-cores 30M Cache, 3.4...
$364.99
Intel - Core i9-13900K 13th Gen 24 cores 8 P-cores + 16 E-cores 36M Cache, 3 ...
$519.99
Intel - Core i7-12700K Desktop Processor 12 (8P+4E) Cores up to 5.0 GHz Unloc...
$242.99
DELL Optiplex 3070 SFF 6 Core i5-9500 3.00 Ghz 8GB,NVMe 128GB,Win11Pro
$99.99
Intel Xeon E5-2667 V2 LGA 2011 3.3GHz 8 Core 130W 25MB 8GT/s CPU Processor
$24.00
AMD Ryzen™ 7 5700X 8-Core, 16-Thread Unlocked Desktop Processor
$163.00
Dell Desktop Computer 16GB RAM 512GB SSD Intel Core i5 8th Gen. Windows 11 Pro
$250.00
8-Core (16-Thread) 16GB RAM, 756GB, W11 Desktop Computer, BlueTooth 5G-WiFi PC
$417.00