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The used OnePlus 6 I bought is stuck on a black screen, detected as "Qualcomm CDMA Technologies MSM QUSB_BULK_CID:0402_SN:B48453B9" (sopuli.xyz)

submitted 1 day ago* (last edited 1 day ago) by sbeak@sopuli.xyz to c/linuxphones@lemmy.ca

8 comments fedilink hide all child comments

Holding down the power button, the power button + volume up, and the power button + both volume buttons does not do anything. What does "Qualcomm CDMA Technologies MSM QUSB_BULK_CID:0402_SN:B48453B9" mean?

I followed the guide using a prebuilt postmarketOS image (v25.12 w/ Phosh). I ran fastboot erase dtbo, fastboot flash boot (.img file), fastboot flash userdata (another .img file), and finally fastboot reboot. I saw a few Tux penguins in the corner and saw the postmarketOS logo. Then, the display turned off. After that, I rebooted in fastboot mode and retried the fastboot flash step and did fastboot reboot. Now my device seems to be unresponsive and appears as "Qualcomm CDMA Technologies MSM QUSB_BULK_CID:0402_SN:B48453B9" (in Android, it was seen as "OnePlus 6", while in fastboot mode, it was seen as "Google Android device")

Has anyone ran into this issue and know how to fix this?

edit: I did unlock the bootloader using "fastboot oem unlock" before flashing anything

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[–] hexagonwin@lemmy.today 9 points 1 day ago (1 children)

afaik QHSUSB_BULK/9008 is the mode known as 'hard brick' which you normally get when the bootloader (aboot?) gets corrupted or something..

but you said you saw the postmarketOS logo, so it doesn't seem like you made any mistakes during pmOS install steps. i suggest you try chatting in postmarketOS's matrix room.

[–] sbeak@sopuli.xyz 2 points 1 day ago (1 children)

I think it's because, after the black screen after the logo appears, I tried to reflash the boot image and used fastboit reboot again. Not sure why the device is in "EDL mode"

[–] hexagonwin@lemmy.today 3 points 1 day ago* (last edited 1 day ago)

i don't think the boot image (kernel+ramdisk) has anything to do with aboot (qualcomm lk bootloader), but my qualcomm/android knowledge is mostly stuck in ~2014 so i'm not sure about this. sorry. i can just recommend going to pmOS chatrooms or XDA forums..

[–] pipes@sh.itjust.works 2 points 1 day ago (2 children)

I think you need the MSM Download Tool to reflash your phone to stock and start over

[–] g5pw@feddit.it 1 points 21 hours ago* (last edited 21 hours ago)

There’s an unofficial reimplementation of QC firehose/sahara, it works correctly on my OnePlus 6T.

[–] sbeak@sopuli.xyz 1 points 1 day ago (1 children)

That seems to be Windows exclusive, and Wine doesn't work with it

[–] hexagonwin@lemmy.today 2 points 1 day ago (1 children)

if you need to use any of qualcomm tools, you should install win7 or 10 in a vm. these are mostly leaked internal tools and there's usually no foss equivalent sadly

[–] sbeak@sopuli.xyz 1 points 1 day ago

Ok I will try to set that up later