- #Uefitool add uefi shell to bios how to
- #Uefitool add uefi shell to bios Bluetooth
- #Uefitool add uefi shell to bios series
- #Uefitool add uefi shell to bios windows
How to access UEFI (BIOS) using boot key option
Once you complete the steps, the device will restart and boot into the UEFI firmware allowing you to change advanced settings, such as to disable or enable secure boot, change boot order, set up a hardware RAID array, enable virtualization, and other settings depending on the motherboard support.
#Uefitool add uefi shell to bios windows
If you want you can run a serial-console on the tablet on /dev/ttyGS0 and then connect to it on the desktop/laptop at /dev/ttyACM0.Source: Windows Central (Image credit: Source: Windows Central) If you have a kernel build with UDC support a quick test is to run a USB-A to micro-B cable from a desktop or laptop to the tablet and then do "sudo modprobe g_serial" on the tablet, after this you should see a binch of messages in dmesg on the desktop/tablet about an USB device showing up ending with something like "cdc_acm 1-3:2.0: ttyACM0: USB ACM device". So on these devices you need to choose, you can either use the micro-usb in device-mode, or get superspeed on the USB-A port, you cannot use both at the same time. So if you have a Cherry Trail device with a x5-z83?0 SoC and it has a superspeed (USB3) USB-A port then that is using the OTG superspeed-lines, when the OTG XHCI controller is enabled and the micro-usb gets switched to device-mode (which it also does when charging!) then this will now also switch the superspeed datalines to device-mode, disconnecting any superspeed USB device connected to the USB-A port. There is one caveat though, the x5-z83?0 Cherry Trail SoCs only have one set of USB3 superspeed data lines and this is part of the USB-datalines meant for the OTG port. On Cherry Trail devices the device-mode phy is build into the SoC, so on most Cherry Trail devices this just works. If you get "ulpi:v0000p0000" instead then your hardware does not have a device-mode phy and you cannot use gadget mode.
On a kernel with UDC enabled you can check if your hardware has such a phy by doing: "cat /sys/bus/ulpi/devices/dwc3.4.auto.ulpi/m odalias" if there is a phy this will usually return "ulpi:v0451p1508". On Bay Trail devices an external device-mode USB-PHY is necessary for device-mode to actually work.
#Uefitool add uefi shell to bios series
Here is the interesting part of the IFR for changing the Wifi/BT model:ĠxC521 One Of: WIFI, VarStoreInfo (VarOffset/VarName): 0x110, VarStore: 0x1, QuestionId: 0x1AB, Size: 1, Min: 0x0, Max 0x2, Step: 0x0 Īnd then running "setup_var_3 0xda 1" on the grub commandline results in a new "00:16.0 USB controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series OTG USB Device" entry showing up in lspci.Īctually using this requires a kernel with UDC (USB Device Controller) support enabled as well as some USB gadget drivers, at least the Fedora kernel does not have these enabled by default. The flashrom packaged in Fedora dumped the BIOS in one go and after build UEFITool and ifrextract from source from their git repos I could extract the interface description for the BIOS Setup menus without issues (as described in the blogpost). Some duckduckgo-ing found this blogpost on changing locked BIOS settings. So instead of going for the DSDT-override I really want to be able to change that BIOS option and set it to the right value. There was an option in the BIOS which actually controls what HID gets advertised for the Wifi/BT named "WIFI" which was set to "RTL8723" which obviously is wrong, but that option was grayed out. Now I could have easily fixed this with an extra initrd with DSDT-overrride but that did not feel right. The UART connected BT part was described in the ACPI tables with a HID (Hardware-ID) of "OBDA8723", not good. Under Linux I quickly found out why, the device actually uses a Broadcom Wifi/BT chipset attached over SDIO/an UART for the Wifi resp.
#Uefitool add uefi shell to bios Bluetooth
This all started with a Mele PCG09 before testing Linux on this I took a quick look under Windows and the device-manager there showed an exclamation mark next to a Realtek 8723BS bluetooth device, so BT did not work.
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