Fastboot is a communication protocol used primarily with Android devices.[1] It is implemented in a command-line interface tool of the same name and as a mode of the bootloader of Android devices. The tool is included with the Android SDK package and used primarily to modify the flash filesystem via a USB connection from a host computer. It requires that the device be started in Fastboot mode. If the mode is enabled, it will accept a specific set of commands,[2] sent through USB bulk transfers. Fastboot on some devices allows unlocking the bootloader, and subsequently, enables installing custom recovery image and custom ROM on the device. Fastboot does not require USB debugging to be enabled on the device.[3] To use fastboot, a specific combination of keys must be held during boot.[4]
On Samsung devices, (excluding the Nexus S and Galaxy Nexus devices), power, volume down and home has to be pressed for entering ODIN mode. This is a proprietary protocol, and tool, as an alternative to fastboot. The tool has a partial alternative.
The fastboot protocol is a mechanism for communicating with bootloaders over USB or ethernet. It is designed to be very straightforward to implement, to allow it to be used across a wide range of devices and from hosts running Linux, macOS, or Windows.
b. TEXT -> the remaining 252 bytes are arbitrary. They should be displayed and then step #2 repeats. It differs from info in that no formatting is applied. The payload is printed as-is with no newline at the end. Payload is expected to be NULL terminated.
e. DATA -> the requested command is ready for the data phase. A DATA response packet will be 12 bytes long, in the form of DATA00000000 where the 8 digit hexadecimal number represents the total data size to transfer.
Where data_size is an unsigned 8-byte big-endian binary value, and data is the fastboot packet. The 8-byte length is intended to provide future-proofing even though currently fastboot packets have a 4-byte maximum length.
The host will re-transmit any packet that does not receive a response. The requirement of exactly one device response packet per host packet is how we achieve reliability and in-order delivery of packets.
For simplicity of implementation, there is no windowing of multiple unacknowledged packets in this version of the protocol. The host will continue to send the same packet until a response is received. Windowing functionality may be implemented in future versions if necessary to increase performance.
The first Query packet will only be attempted a small number of times, but subsequent packets will attempt to retransmit for at least 1 minute before giving up. This means a device may safely ignore host UDP packets for up to 1 minute during long operations, e.g. writing to flash.
Any packet may set the continuation flag to indicate that the data is incomplete. Large data such as downloading an image may require many continuation packets. The receiver should respond to a continuation packet with an empty packet to acknowledge receipt. See examples below.
The host starts with a Query packet, then an Initialization packet, after which only Fastboot packets are sent. Fastboot packets may contain data from the host for writes, or from the device for reads, but not both.
I was at the /e/-foundations forum adviced to search for a fastboot package for Fedora 33. As I further learned by experience. It is better to ask experienced users in here instead of searching the internet for random Linux softwarepackages and downloading them.
I have a dual boot setup with Windows. The problem is that fastboot is not working on Arch Linux.
I'm using the same cable to test it. I'm sure the phone is in fastboot mode. I'm using the android-tools package. I don't think it matters, but I have a Xiaomi Mi6 with MIUI 10 Global, with unlocked bootloader.
The same commands, with the same exact files (shared volume), are working on Windows.
What the hell is going on? I'm posting here because the same problem, posted by another user, didn't get much attention on xda, and after all, it's a linux problem.
Adding udev rules halfway through added confusion for me. Later I found out I never was properly reloading the udev rules. Restarting the udev.service does not work. I had to:udevadm control --reloadthenudevadm trigger as found here:
The set of udev rules that I copied from a recent .deb package had me covered; however on a side note I found that my device has different vendor ID's when mounted normally versus when it is in fastboot.
Then I could: adb reboot bootloader but fastboot devices would not return my device and I never resolved that problem (which was the second issue); however this post helped me (actually the original poster has covered this already in their question):
I found that fastboot could still communicate to the device and I could issue commands but I would always have to specify the device via the -i option. For example: fastboot -i 0xVENDOR_ID getvar WHATEVER
If anyone's experiencing the same problem, it's possible that you're trying to use fastboot with a Samsung phone. After trying everything on Stack Exchange, I learnt that many Samsung phones don't support fastboot for flashing firmware, and instead use Samsung's own system called Odin.
I've read on a few different sites, ex: Factory flashing with U-Boot and fastboot on Freescale i.MX6 , that's it's possible to enable Fastboot in the u-boot bootloader for i.MX6 products. I attempted to add the correct configuration options into the include/configs/mx6sabresd.h header file, but for some reason the built u-boot.imx still doesn't have the fastboot tool enabled.
Thanks for your reply, I attempted to use the patch as you suggested but after applying it there were a number of additional build failures. Finally I took a "simple" route and simply included the mx6sabreandroid_common header file which resided within include/configs as can be seen from the below patch file:
After doing this, the build finished successfully and I was able to access the "fastboot" command from the u-boot prompt. Windows also detected the device to be an "Android ADB Interface" when it booted via RAM.
Thanks for your reply Igor, unfortunately I'm not talking about this "eMMC Fast Boot" feature which is noted in the documents and on the other thread, but rather "fastboot" the utility for flashing a device, which has nothing to do with boot time.
The patch on that site doesn't work directly, but that's the idea I'm trying to accomplish. I've read on a few similar pages that it does work on i.MX6 devices, but no concrete examples and I haven't gotten the u-boot to recognize the "fastboot" command yet.
I'm trying to unlock the bootloader on my LG G6 (specifically LGUS997) phone to enable root access. Following LG's instructions, I've downloaded the command line Android SDK tools, notably ADB and fastboot.
ADB recognizes my phone just fine but in order to unlock the bootloader I need to reboot the phone into fastboot mode (which ADB can do). The problem is fastboot.exe does not recognize my phone at all, even after installing the Google USB drivers as well as my phone's specific drivers.
However, the GSI offered on the /e/ website only contains one single system.img file, not the boot.img used in that particular command. Could this possibly refer to some boot.img file from the original MIUI ROM? If so, what is a safe way to get my hands on that file?
Depending on the device, the command fastboot flash --disable-verity --disable-verification boot boot.img may cause system errors. Often it is sufficient to execute only fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img to then flash the system.img.
Sent magic packet using router tool and through an android function I use daily which works fine with fastboot off, and works fine with fast boot on on every other device I have (this is the only Intel NIC I've unfortunately been stuck with)
I have successfully setup the registry, but can not find "ReadMe-WakeOnFastStartup.txt" on the internet and do not understand how to "Add a write in BIOS in IO space of ACPI, register GPE0a_EN in (Base address* + 0x28), set bit 13, PME_B0 Enable". However, if I have understood "After Enabling LOM driver by setting registry "WakeOnFastStartup" to 1, the BIOS will set this bit whenever the system goes to S5 Fast Startup." correctly a reboot will cover the rest of the instructions.
Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.
I'm following the official Web Installer instructions, and having trouble getting Windows 10 to install the Google USB Driver (with fastboot) onto Windows 10 via the Computer Management tool. Could I get your help / advice? Below is my experience so far.
"On Windows, you need to install a driver for fastboot if you don't already have it. No driver is needed on other operating systems. You can obtain the driver from Windows Update which will detect it as an optional update when the device is booted into the bootloader interface and connected to the computer. Open Windows Update, run a check for updates and then open the "View optional updates" interface. Install the driver for the Android bootloader interface as an optional update."
This approach has not worked for me. Windows does not provide drivers no matter how many reboots or update checks I do within Windows Settings, with and without the phone plugged in directly to my laptop's ports via an OEM cable at different stages of the process.
"The best drivers for your device are already installed
Windows has determined that the best driver for this device is already installed. There may be better drivers on Windows Update or on the device manufacturer's website.
MTP USB Device