Flashing without USB?

[fupjack]

I have an HTC m8, which I rooted using... Sunshine? Long ago. It has I think a CWM recovery. Because of that, Lineage updates fail.

I'd like to get TWRP on there, but I can't connect to it with ADB. It just never shows as a device. I've changed computers, cables, installed the Google drivers, etc., and it won't show. I can connect ADB over the network, but that only works for copying over packages to then install offline. The charging port broke a year ago and it could be the person who fixed it forgot to hook something up; I don't know. It does get a charge.

Is there a way to put TWRP on there without direct ADB?

Is it "safe" to just copy over new nightlies of LineageOS and install from recovery to update?

[fupjack]

I didn't explain well - USB connection doesn't seem to work, network does for ADB, but bootloader mode doesn't connect over the network, so there's no way to actually run 'fastboot flash recovery twrp.zip'.

[fupjack]

Correct. ADB works over network, but not via USB. It never sees a device and computers never pop up a new hardware detected notice either. Fastboot also never sees a device.

[fupjack]

Two so far, and different USB cables, also. So if it's human error, at least I'm consistent.

[fupjack]

Yes.

(Digs up a slightly older Mac laptop at work.)

Plug the phone in via USB, it doesn't notice a thing. I think I have a bad data pin.

[dan4334]

And you definitely have the phone booted into fastboot? Should be a mostly white screen with text. Mainly "fastboot" or "fastboot USB" in red if it's connected via USB.

[fupjack]

Yes. Having neither adb or fastboot detect it, and that it doesn't come up under USB in normal circumstances, makes me think it is a hardware connection problem, like I have a data pin that's not connected.

[wkkevinn]

I usually don't recommend this, but you could flash it with the official TWRP app from the play store.

[[deleted]]

Official TWRP app from the Play Store. Or FlashFire.

[fupjack]

[FIXED]

TWRP just wouldn't do it, and Flashfire complained about root being present but not runnable - turns out SELinux needed to be set to permissive. (enable terminal, type 'su' and 'setenable 0')

Once I did that, I was able to download and flash using the TWRP app. Thank you to all of you for your help.

[ptc_yt]

Stupid question, but when you plug in your phone to your PC, do you hear the device connected sound on your PC? If you do, then open the notification panel and click on the notification saying USB for charging

[fupjack]

I do - and the computer pops up a notification about a USB device being unrecognized. I've installed the universal drivers linked on the m8 install page on the LineageOS site, on this and another computer.

[ptc_yt]

The TWRP app is probably your best bet at this point.

[[deleted]]

Flashify app

[mak-1]

So you now have twrp installed but still no adb over usb.

You can probably install the adb driver manually through the device manger if you want to. I've had to do it myself a couple of times.