Re: Lenovo E16 Gen1 with Intel Iris adjust brightness, get Fn-Keys working
On Tue, Oct 24, 2023 at 08:54:35AM +0100, Tixy wrote: > step=200 > curval=`cat $device/brightness` > newval=`echo $(expr $curval - $step)` Just FYI, all POSIX compatible shells can do integer arithmetic without calling expr(1). newval=$((curval - step)) Also, assuming "$device/brightness" is a (pseudo-)file containing a textual representation of a number, you can read it with "read" to avoid forking an unnecessary process. read -r curval < "$device/brightness"
Re: Lenovo E16 Gen1 with Intel Iris adjust brightness, get Fn-Keys working
On Tue, Oct 24, 2023 at 09:32:24AM +0200, basti wrote: > > > On 24.10.23 06:18, David Wright wrote: > > On Mon 23 Oct 2023 at 20:03:50 (+0200), basti wrote: > > > I have a Lenovo E16 Gen1 with Intel Iris and try to adjust brightness > > > via Fn-Keys. > > > All other Fn-Keys are working. [...] > OK, I can write the values to > /sys/class/backlight/intel_backlight/brightness > > The default is 15040, which seems to be the maximum. > Nothing visible changes between 15040 and 13000. > 60 is very dark. > It therefore looks like an exponential function. > > I have to see how I can represent this in a function to use it with the > fn-keys. What I have done (Thinkpad X230 here) is to put this in /etc/acpi/actions/brite (call it how you like): #!/bin/sh logger "[ACPI] $@" BASE="/sys/class/backlight/intel_backlight" CURR=$(cat "$BASE/brightness") MAX=$(cat "$BASE/max_brightness") # MIN is some arbitrary "low" value. Note that for values # of MIN below 6 (more precisely: 2/11 for our factor), the # thing gets stuck at the low end: (13 * x) / 11 == x, # in integer arithmetic, for x <= 5. # # The "exponential" algorithm is a bit long at the low # end. We might consider stretching there. Or increasing # MIN. MIN=20 if [ "$CURR" -lt "$MIN" ] ; then CURR="$MIN" ; fi # NOTE: 11/13 is approx the fourth root of 1/2: # i.e. four steps are a doubling/halving # of brightness (constant steps gave too # coarse jumps in the low range) case $1 in video/brightnessdown* ) NEW=$(( (11 * CURR) / 13 )) ;; video/brightnessup* ) NEW=$(( (13 * CURR) / 11 )) ;; * ) exit 0 ;; esac if [ "$NEW" -lt "$MIN" ] ; then NEW="$MIN" ; fi if [ "$NEW" -gt "$MAX" ] ; then NEW="$MAX" ; fi logger "[ACPI] brightness $CURR --> $NEW" echo "$NEW" > $BASE/brightness The real action is in the last line, which writes to the sys file. Then hook it up on your acpi events. In /etc/acpi/events/briteup , I have this: event=video/brightnessup action=/etc/acpi/actions/brite "%e" and in .../britedn, this event=video/brightnessdown action=/etc/acpi/actions/brite "%e" I *think* that was all. Now you have to find out how the ACPI events are actually spelt by your computer (the "brightnessup" and "...down" above). For this, you enter acpi_listen into your favourite terminal and hit the keys in question. It's a long while ago and my notes are fragmentary, so perhaps I've forgotten something. The nice part is that this works outside of X, too. Cheers -- t signature.asc Description: PGP signature
Re: Lenovo E16 Gen1 with Intel Iris adjust brightness, get Fn-Keys working
On Tue, 2023-10-24 at 09:32 +0200, basti wrote: > > OK, I can write the values to > /sys/class/backlight/intel_backlight/brightness > > The default is 15040, which seems to be the maximum. > Nothing visible changes between 15040 and 13000. > 60 is very dark. > It therefore looks like an exponential function. > > I have to see how I can represent this in a function to use it with the > fn-keys. > You can edit ~/.config/openbox/lxde-rc.xml Here's my full notes from when I did what your trying to do on a laptop many years ago. This obviously needs modifying for your machine... 0. Edit /etc/rc.local to add # make brightness writeable chmod a+w /sys/devices/pci:00/:00:02.0/drm/card0/card0-LVDS-1/intel_backlight/brightness # set brightness to a nice default echo 1200 >/sys/devices/pci:00/:00:02.0/drm/card0/card0-LVDS-1/intel_backlight/brightness The make file executable chmod a+x /etc/rc.local UPDATE: rc.local now needs a shebang at the top, i.e. #!/bin/sh 1. Create /home/tixy/bin/bl- to reduce brightness in steps #!/bin/bash device="/sys/devices/pci:00/:00:02.0/drm/card0/card0-LVDS-1/intel_backlight" step=200 curval=`cat $device/brightness` newval=`echo $(expr $curval - $step)` if [ $newval -le $step ]; then newval=$step fi echo $newval echo $newval >$device/brightness 2. Create /home/tixy/bin/bl+ to increase brightness in steps #!/bin/bash device="/sys/devices/pci:00/:00:02.0/drm/card0/card0-LVDS-1/intel_backlight" step=200 curval=`cat $device/brightness` maxval=`cat $device/max_brightness` newval=`echo $(expr $curval + $step)` if [ $newval -ge $maxval ]; then newval=maxval fi echo $newval echo $newval >$device/brightness 3. Edit '' section of ~/.config/openbox/lxde-rc.xml /home/tixy/bin/bl+ /home/tixy/bin/bl-
Re: Lenovo E16 Gen1 with Intel Iris adjust brightness, get Fn-Keys working
On 24.10.23 06:18, David Wright wrote: On Mon 23 Oct 2023 at 20:03:50 (+0200), basti wrote: I have a Lenovo E16 Gen1 with Intel Iris and try to adjust brightness via Fn-Keys. All other Fn-Keys are working. basti@thinkpad:~$ xbacklight -set 50 No outputs have backlight property I also try to create a xorg.conf: |Section "Device" Identifier "Intel Graphics" Driver "intel" Option "Backlight" "intel_backlight" EndSection But after that X is not start. [ 20.735] (II) LoadModule: "intel" [ 20.735] (WW) Warning, couldn't open module intel [ 20.735] (EE) Failed to load module "intel" (module does not exist, 0) [ 20.735] (EE) No drivers available. I use LXDE as Desktop. How can I get it working. Do you have the following file: $ cat /sys/class/backlight/intel_backlight/brightness 40 $ If so, do you get brightness changes when you write values into it: # printf '%s' "60" > /sys/class/backlight/intel_backlight/brightness Cheers, David. OK, I can write the values to /sys/class/backlight/intel_backlight/brightness The default is 15040, which seems to be the maximum. Nothing visible changes between 15040 and 13000. 60 is very dark. It therefore looks like an exponential function. I have to see how I can represent this in a function to use it with the fn-keys.
Re: Lenovo E16 Gen1 with Intel Iris adjust brightness, get Fn-Keys working
On Mon 23 Oct 2023 at 20:03:50 (+0200), basti wrote: > I have a Lenovo E16 Gen1 with Intel Iris and try to adjust brightness > via Fn-Keys. > All other Fn-Keys are working. > > basti@thinkpad:~$ xbacklight -set 50 > No outputs have backlight property > > I also try to create a xorg.conf: > > |Section "Device" Identifier "Intel Graphics" Driver "intel" Option > "Backlight" "intel_backlight" EndSection But after that X is not > start. [ 20.735] (II) LoadModule: "intel" [ 20.735] (WW) Warning, > couldn't open module intel [ 20.735] (EE) Failed to load module > "intel" (module does not exist, 0) [ 20.735] (EE) No drivers > available. I use LXDE as Desktop. How can I get it working. Do you have the following file: $ cat /sys/class/backlight/intel_backlight/brightness 40 $ If so, do you get brightness changes when you write values into it: # printf '%s' "60" > /sys/class/backlight/intel_backlight/brightness Cheers, David.
Re: Lenovo E16 Gen1 with Intel Iris adjust brightness, get Fn-Keys working
On Mon, 23 Oct 2023 20:03:50 +0200 basti wrote: > I have a Lenovo E16 Gen1 with Intel Iris and try to adjust brightness > via Fn-Keys. > All other Fn-Keys are working. Your best bet for this might be the thinkwiki. https://www.thinkwiki.org/wiki/ThinkWiki Good luck. -- Does anybody read signatures any more? https://charlescurley.com https://charlescurley.com/blog/
Lenovo E16 Gen1 with Intel Iris adjust brightness, get Fn-Keys working
Hello, I have a Lenovo E16 Gen1 with Intel Iris and try to adjust brightness via Fn-Keys. All other Fn-Keys are working. basti@thinkpad:~$ xbacklight -set 50 No outputs have backlight property I also try to create a xorg.conf: |Section "Device" Identifier "Intel Graphics" Driver "intel" Option "Backlight" "intel_backlight" EndSection But after that X is not start. [ 20.735] (II) LoadModule: "intel" [ 20.735] (WW) Warning, couldn't open module intel [ 20.735] (EE) Failed to load module "intel" (module does not exist, 0) [ 20.735] (EE) No drivers available. I use LXDE as Desktop. How can I get it working. Best Regards |
