(Re)setting bios settings help or documentation

[smaftoul]

I'm sorry, there is some documentation, but the only thing I'm able to do for now with this driver is listing bios settings (cat /sys/kernel/debug/thinkpad-wmi/bios_settings).

I can't find a way to set a particular setting with /sys/kernel/debug/thinkpad-wmi/bios_setting:
I tried echo'ing on argument a setting, and it's value in bios_setting, tried echo'ing KEY=VALUE in bios_setting, with or without -e on the echo, without success. I can write anything to argument, it works, but writing on /sys/kernel/debug/thinkpad-wmi/bios_setting always gives echo: write error: Invalid argument

Also, I would be fine just loading the default, but that is also something I can't manage to do:

# echo 1 > /sys/kernel/debug/thinkpad-wmi/load_default 
bash: echo: write error: Invalid argument

How can I set a particular setting ? How can I load the defaults ?

This is maybe a debugfs / sysfs miscomprehension, but I think , having a bit more documentation would help. If I get some help to do what I want, I cant make a PR to improve docs.

[iksaif]

# echo 1 > /sys/kernel/debug/thinkpad-wmi/load_default 
bash: echo: write error: Invalid argument

This should really just work, if it doesn't it means there is likely a bug with the driver (or bad interaction with your model). That's also probably why the other commands are giving you an "Invalid argument".

[smaftoul]

I have this:

$ dmidecode -s system-family 
ThinkPad X1 Yoga 1st

Which is not listed in https://download.lenovo.com/ibmdl/pub/pc/pccbbs/thinkcentre_pdf/hrdeploy_en.pdf.

Though, it is listed in https://download.lenovo.com/pccbbs/mobiles_pdf/kbl-r_deploy_01.pdf which is follows a bit the same structure.

Do you know if this driver could add support for those models ? or it needs a different driver ?

[iksaif]

On Wed, May 20, 2020 at 3:26 PM smaftoul ***@***.***> wrote: I have this: $ dmidecode -s system-family ThinkPad X1 Yoga 1st Which is not listed in https://download.lenovo.com/ibmdl/pub/pc/pccbbs/thinkcentre_pdf/hrdeploy_en.pdf . Though, it is listed in https://download.lenovo.com/pccbbs/mobiles_pdf/kbl-r_deploy_01.pdf which is follows a bit the same structure. Do you know if this driver could add support for those models ? or it needs a different driver ?

I suspect that the model might be different enough that it will at least requires somebody to adapt the driver.

…

-- Corentin Chary http://xf.iksaif.net

[smaftoul]

I suspect that the model might be different enough that it will at least requires somebody to adapt the driver.

I can probably try to do the work, but I don't really know where can I get those GUIDs, where did you find the ones in your driver ?

[iksaif]

I looked at the documentation I found online + at the DSDT (see https://lwn.net/Articles/391230/)