Compatibility with Fujitsu Siemens S936

[Yattatux]

Any chance of adding the s936 to the list of compatible laptops?

Many thanks for your work.

[maniacx]

I can add fujistsu to the extension with some information/help from you. I just checked the linux kernel and seems like a dev added support for fujistsu 3 months ago

https://github.com/torvalds/linux/blob/master/drivers/platform/x86/fujitsu-laptop.c

https://github.com/torvalds/linux/commit/14c8a1451810cf616c959574bee4fad246f3a0cb

Can you control the charging threshold using command line?

You should be able to set charging threshold using command

echo '60' | sudo tee /sys/class/power_supply/BAT0/charge_control_end_threshold

Note that BAT0 may be BAT1 in some laptops

Also provide me a list of charging devices

ls -l /sys/class/power_supply/

Also need to know location of fujistsu module, so that the extension can set properties for fujistsu.

Post the result of this.

ls -l /sys/devices/platform/framework_laptop

[Yattatux]

Hello, thanks for reply.

my system:

$ uname -a
Linux fedora 6.8.7-200.fc39.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Apr 17 19:35:11 UTC 2024 x86_64 GNU/Linux

Output in my laptop:

$ echo '60' | sudo tee /sys/class/power_supply/BAT0/charge_control_end_threshold
[sudo] password: 
tee: /sys/class/power_supply/BAT0/charge_control_end_threshold: File or directory does not exist

$ ls -l /sys/class/power_supply/
total 0
lrwxrwxrwx. 1 root root 0  1 mag  2024 AC -> ../../devices/platform/ACPI0003:00/power_supply/AC
lrwxrwxrwx. 1 root root 0  1 mag  2024 CMB1 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0A:00/power_supply/CMB1

$ ls -l /sys/devices/platform/framework_laptop
ls: impossibile accedere a '/sys/devices/platform/framework_laptop': File or directory does not exist

$ ls -l /sys/class/power_supply/CMB1/
total 0
-rw-r--r--. 1 root root 4096  1 mag 21.29 alarm
-r--r--r--. 1 root root 4096  1 mag 21.26 capacity
-r--r--r--. 1 root root 4096  1 mag 21.29 capacity_level
-r--r--r--. 1 root root 4096  1 mag 21.26 charge_full
-r--r--r--. 1 root root 4096  1 mag 21.26 charge_full_design
-r--r--r--. 1 root root 4096  1 mag 21.26 charge_now
-r--r--r--. 1 root root 4096  1 mag 21.26 current_now
-r--r--r--. 1 root root 4096  1 mag 21.26 cycle_count
lrwxrwxrwx. 1 root root    0  1 mag 21.26 device -> ../../../PNP0C0A:00
drwxr-xr-x. 3 root root    0  1 mag  2024 hwmon1
-r--r--r--. 1 root root 4096  1 mag 21.26 manufacturer
-r--r--r--. 1 root root 4096  1 mag 21.26 model_name
drwxr-xr-x. 2 root root    0  1 mag 21.29 power
-r--r--r--. 1 root root 4096  1 mag 21.26 present
-r--r--r--. 1 root root 4096  1 mag 21.26 serial_number
-r--r--r--. 1 root root 4096  1 mag 21.26 status
lrwxrwxrwx. 1 root root    0  1 mag  2024 subsystem -> ../../../../../../class/power_supply
-r--r--r--. 1 root root 4096  1 mag 21.26 technology
-r--r--r--. 1 root root 4096  1 mag 21.26 type
-rw-r--r--. 1 root root 4096  1 mag  2024 uevent
-r--r--r--. 1 root root 4096  1 mag 21.26 voltage_min_design
-r--r--r--. 1 root root 4096  1 mag 21.26 voltage_now

[maniacx]

My mistake the command was frameworks laptops Try this.

 ls -l /sys/devices/platform/fujistsu-laptop

If still not found, Do

ls -l /sys/devices/platform/

And see if there is any module registered under fujitsu such as fujistu-laptop or fujitsu_laptop

Regarding charging threshold seems like the patch is not yet merged or accepted in the main line kernel. That why you are not seeing charge_control_end_threshold under your battery. If you know how to

1. apply the patch to the kernel and compile and install it or compile it as a module

2. How to revert back to the original kernel incase the kernel doesn't boot.

   you can apply the kernel patch and test it.

I have never done it, or I cannot guide you.

Or else wait for it to be merged in the main line

[Yattatux]

Thanks for reply ;)

Output:

$  ls -l /sys/devices/platform/fujitsu-laptop/
totale 0
-r--r--r--. 1 root root 4096  2 mag 21.11 dock
lrwxrwxrwx. 1 root root    0  2 mag 20.31 driver -> ../../../bus/platform/drivers/fujitsu-laptop
-rw-r--r--. 1 root root 4096  2 mag 21.11 driver_override
-r--r--r--. 1 root root 4096  2 mag 21.11 lid
-r--r--r--. 1 root root 4096  2 mag 21.11 modalias
drwxr-xr-x. 2 root root    0  2 mag 21.11 power
-r--r--r--. 1 root root 4096  2 mag 21.11 radios
lrwxrwxrwx. 1 root root    0  2 mag 20.32 subsystem -> ../../../bus/platform
-rw-r--r--. 1 root root 4096  2 mag 20.32 uevent

I too, have never patched the kernel. In the next days I might try to do that, maybe I can succeed.

Thanks again ^_

[maniacx]

Seems like the patch for fujistsu is merged in kernel 6.9.1

[Yattatux]

Seems like the patch for fujistsu is merged in kernel 6.9.1

Hello @maniacx and thanks for info. I'm on Fedora 41 now, and kernel 6.9.0-64 works ^__^ I'm here for test on Fujitsu S936

$ uname -a
Linux fedora 6.9.0-64.fc41.x86_64 #1 SMP PREEMPT_DYNAMIC Mon May 13 11:58:46 UTC 2024 x86_64 GNU/Linux

$ echo '60' | sudo tee /sys/class/power_supply/CMB1/charge_control_end_threshold
[sudo] password: 
60

$ ls -l /sys/devices/platform/fujitsu-laptop
total 0
-r--r--r--. 1 root root 4096 May 23 16:25 dock
lrwxrwxrwx. 1 root root    0 May 23 16:13 driver -> ../../../bus/platform/drivers/fujitsu-laptop
-rw-r--r--. 1 root root 4096 May 23 16:25 driver_override
-r--r--r--. 1 root root 4096 May 23 16:25 lid
-r--r--r--. 1 root root 4096 May 23 16:25 modalias
drwxr-xr-x. 2 root root    0 May 23 16:25 power
-r--r--r--. 1 root root 4096 May 23 16:25 radios
lrwxrwxrwx. 1 root root    0 May 23 16:14 subsystem -> ../../../bus/platform
-rw-r--r--. 1 root root 4096 May 23 16:14 uevent

[maniacx]

How about reading threshold? Does that work too? change threshold with different values and try reading using cat command

echo "---- write ----"
echo '80' | sudo tee /sys/class/power_supply/CMB1/charge_control_end_threshold

echo "---- read ----"
cat /sys/class/power_supply/CMB1/charge_control_end_threshold

I have uploaded a test branch. https://github.com/maniacx/Battery-Health-Charging/tree/test_fujistsu If reading works, this branch should work. Install extension by running ./install.sh, and restart gnome-shell(logout - login). Enable extension and test if it works.

If there is no compatible extension app or extension manager app for Fedora 41, you can enable the extension using command-line

gnome-extensions enable Battery-Health-Charging@maniacx.github.com

Note: I do not know which gnome-shell version is Fedora 41 is using. it could Gnome 46 which is compatible with extesnsion or may be the latest main branch of gnome-shell, which may or may not be compatible, if there are major changes in the latest gnome-shell.

Let me know how it goes.

[Yattatux]

I download new branch, installed it by ./install.sh Log out/ Log in and then: gnome-extensions enable Battery-Health-Charging@maniacx.github.com

There is a error message when I enable it:

Battery Healt Charging Error
Please install polkit from extension settings under installation.

threshold works fine:

yatta@fedora:~$ echo '80' | sudo tee /sys/class/power_supply/CMB1/charge_control_end_threshold
[sudo] password for yatta: 
80
yatta@fedora:~$ cat /sys/class/power_supply/CMB1/charge_control_end_threshold
80

yatta@fedora:~$ echo '85' | sudo tee /sys/class/power_supply/CMB1/charge_control_end_threshold
85
yatta@fedora:~$ cat /sys/class/power_supply/CMB1/charge_control_end_threshold
85

Gnome in Fedora 41:

yatta@fedora:~$ gnome-shell --version
GNOME Shell 46.1

[maniacx]

Did you install polkit rules from the extension preferences. Click on Settings in that notification, and it will take you to extension prefs. In extension prefs > General > Installation > Click install.

another way to open extension preferences window is using extension app or extension manager app. or you can use command line

gnome-extensions prefs Battery-Health-Charging@maniacx.github.com

[Yattatux]

Ops! Ok, it works well now!!

[maniacx]

Thanks