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| -rw-r--r-- | docs/hardware/kfsn4-dre.md | 5 | ||||
| -rw-r--r-- | docs/misc/index.md | 24 |
2 files changed, 24 insertions, 5 deletions
diff --git a/docs/hardware/kfsn4-dre.md b/docs/hardware/kfsn4-dre.md index 944098e0..e3974921 100644 --- a/docs/hardware/kfsn4-dre.md +++ b/docs/hardware/kfsn4-dre.md @@ -63,6 +63,11 @@ Current issues {#issues} disappears if using KMS, once the kernel starts. The jitter will remain, if booting the kernel in text-mode). +- Booting from USB mass storage devices is not possible; neither GRUB + nor SeaBIOS detect USB drives when present. USB keyboards function + under both GRUB and SeaBIOS, albeit slowly under GRUB + (several seconds per character typed). + Other information ================= diff --git a/docs/misc/index.md b/docs/misc/index.md index 51c53c2c..3ab64bc9 100644 --- a/docs/misc/index.md +++ b/docs/misc/index.md @@ -210,18 +210,32 @@ battery goes to a critically low charge level, a beep occurs. Nvramtool is included in libreboot, and can be used to enable or disable this behaviour. +You need to write changes in a libreboot rom image, and flash it, in order +to apply them. You can either use a pre-compiled rom image, or create an image +from the current one in your computer. See here +<https://libreboot.org/docs/gnulinux/grub_cbfs.html#get-the-rom-image> for +more information on how to do that. + +Once you have a libreboot rom image, say 'libreboot.rom', you can write +changes on the image with the following commands. + Disable or enable beeps when removing/adding the charger: - $ sudo ./nvramtool -w power\_management\_beeps=Enable - $ sudo ./nvramtool -w power\_management\_beeps=Disable + $ sudo ./nvramtool -C libreboot.rom -w power\_management\_beeps=Enable + $ sudo ./nvramtool -C libreboot.rom -w power\_management\_beeps=Disable Disable or enable beeps when battery is low: - $ sudo ./nvramtool -w low\_battery\_beep=Enable + $ sudo ./nvramtool -C libreboot.rom -w low\_battery\_beep=Enable + $ sudo ./nvramtool -C libreboot.rom -w low\_battery\_beep=Disable + +You can check that the parameters are set in the image with : - $ sudo ./nvramtool -w low\_battery\_beep=Disable + $ sudo ./nvramtool -C libreboot.rom -a -A reboot is required, for these changes to take effect. +Finally, you need to flash the rom with this new image. See here +<https://libreboot.org/docs/gnulinux/grub_cbfs.html#with-re-flashing-the-rom> +for a detailed explanation. Get EDID: Find out the name (model) of your LCD panel ===================================================== |