I think I lost fastboot*D* (?)

37 posts
Thanks Meter: 15
By pfdeadpool, Member on 26th March 2020, 01:18 AM
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**solved with unbrick tool, see post #3, thanks

OnePlus 7t GM1905 (North America)

'fastboot reboot fastboot'
Phone boots to Chinese screen (and stops).
computer powershell stuck at '< waiting for any device >'
If I manually select boot to fastboot on phone, I get error: 'fastboot: error: Failed to boot into userspace fastboot; one or more components might be unbootable.'

I got my phone - first OnePlus
I installed msm xtended rom, no problems
I installed AOSIP rom, no problems
I installed Omnirom (had to dump a payload file, but got it up and running)

I wanted to go back to msm xtended rom
The phone won't reboot into fastbootd. It also wasn't recognizing with the same USB port and cable I was using yesterday.
I can still boot into stock OnePlus 7t, and access recovery, sometimes wifi/bluetooth does not turn on, but otherwise seems pretty normal.
I can try to flash roms (including stock), but they fail on the 'fastboot reboot fastboot' command. Also have problems with fastboot -w.
SDK 29.0.6
I used OP 7t cable, & 2 Anker cables (all USB A - USB C)
I flashed a Xiaomi between yesterday & today; maybe I need to reinstall drivers for the OP 7t(?) I don't think the 7t is recognized in device manager; at least I did not understand how to see it in device manager following these directions for Unbrick tool.

Thanks for any advice or tips on searching. And thank you for the development. Seems like searching for "fastbootd" is a bit tricky
26th March 2020, 03:27 PM |#2  
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Thanks Meter: 178
Fastbootd is a tricky fish and I'm not shocking you're having issues. Sounds like you might want to use the MSM Tool and completely factory reset your device. Should also replace/fix fastbootd
26th March 2020, 07:29 PM |#3  
OP Member
Thanks Meter: 15
Thanks, using the unbrick tool solved it.

To anyone searching in the future----
#1, unless you have used omnirom in the past & know you like it, I would suggest avoiding it. I liked xtended the best, then AOSIP, then Omnirom. xtended & AOSIP are easy to flash

I was having problems with getting the 7t recognized in the unbrick tool.
basically, I was having trouble getting it recognized as (QDLOADER 9008 or QHUSB_BULK in faq)
solution was to start unbrick tool, select O2, get ready to click start- power on, keep holding down vol up & vol down; and when phone was recognized in unbrick tool (still never saw QLOADER or QHUSB), quickly hit start on unbrick tool.
i didn't click 'enum', didn't have time.
more info in post #28 & #33, and others in that thread

I forget which drivers I ended up having installed. You can find OnePlus drivers online, & the qualcomm stuff is listed in that unbrick thread faq
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