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fastboot version 30.0.4-6686687

Trying to temporarily boot TWRP recovery image twrp-3.4.0-0-lake.img on my unlocked Motorola Moto G7 Plus.

Phone is connected via USB Type-C to Type-C cord from the box to my laptop running Linux (Manjaro 20.0.3) Live USB system.

When I run ./fastboot boot twrp-3.4.0-0-lake.img or ./fastboot boot boot.img (same file, renamed) with and without sudo, it always gets stuck at Sending 'boot.img' (30080 KB) doing nothing.

Bootloader logs section of fastboot mode shows cmd: download:01d60000.

The PC I use now is the only PC that helped me to actually unlock the bootloader. Other PCs I have were not able to send correct fastboot commands (for example, oem help transformed to oem helpersion, and oem get_unlock_data cut to oem get_unlock). Those PCs had regular USB Type-A 3.0 ports, so I connected them to my phone with corresponding 3rd-party cable. It might be of insufficient quality though.

All files are located near to the root of extrenal SSD connected to another Type-C port, so the absolute paths to TWRP image and fastboot executable should not be too long.

Type-C cords are new and OK.

Motorola doesn't distribute Linux drivers for their devices.

What else could be wrong here? Please help. Any advice is appreciated.

Will update this post later with my own findings as well for people who could stumble a similar problem.

Update 1

Tried fastboot boot boot.img on another PC. It is also running Linux (Ubuntu 20.04). Connection is from Type-A to Type-C. Wire is good. No noticeable changes. Main issue persists.

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