Flash TWRP without usb, with root. Help please.

[hfmls]

So, wanted to use my old pixel 2 xl but USB only works for charging. PC won't detect it, used dozens of cables and different computers.
I have latest carbon image and root. Wanted to boot twrp.img and then flash the twrp.zip since it used to be that way.

Any hints on this please? Because using apps says partion doesn't exist. I recall it used to be the "issue". That's why we had to boot twrp first and then flash it.
Maybe there is a different solution now.


Any help would be much appreciated.

 

[V0latyle]

This is not possible without USB. When the device reboots, RAM is cleared and nothing is "held" in NVRAM for the boot process. The device will either boot the image currently in the boot partition, or if commanded, will live boot the image you specify.

It -is- possible to write images to /boot using root, but keep in mind that since Magisk does not support the compression used for the stock recovery kernel, flashing TWRP to /boot will result in a device that can only boot TWRP.

 

[hfmls]

i see, ok, so, sorry the stupid question in advance.
What if i write twrp .img to boot, then it always boots from twrp, but since i have twrp.zip and a rom.zip in media i can flash .zip to recovery partition and then reboot to recovery and flash rom.zip?

Or is this just to dumb to even ask.

 

[Strephon Alkhalikoi]

i see, ok, so, sorry the stupid question in advance.
What if i write twrp .img to boot, then it always boots from twrp, but since i have twrp.zip and a rom.zip in media i can flash .zip to recovery partition and then reboot to recovery and flash rom.zip?

Or is this just to dumb to even ask.

Not a dumb question. However, flashing TWRP will result in a device that can only boot TWRP. This applies even if you flash a ROM to a slot.

The best alternative I've found is to run LineageOS. This is because that ROM includes its own recovery that can flash non-Google zips. Further, its updater not only doesn't require a usb cable it also gracefully handles Magisk.

Unfortunately, LineageOS isn't Carbon, and Carbon doesn't include a built-in updater. In your case, you may have no choice but to use a USB cable.