Hello,
I have a go color 7 gen 2 and I also tried to install magisk by trying to follow
this tutorial and now my device is also stuck in fastboot, matching the first post in the thread. I am in the process of preparing myself an EDL cable and attempting the recovery process outlined in doomgoatman's detailed post but I first wanted to confirm how many of these steps are applicable to color 7 gen 2, and if it's also compatible with the fairphone image method described above etc.
My current situation (I will update as there are new developments)
* go color 7 gen 2 and ubuntu for flashing environment
* I have tried to apply root using the method described here
buduroiu.com/blog/taming-boox-gocolor7/
* I took a backup of boot_a and flashed magisk patched boot_a using EDL (I did not alter boot_b as a backup and also, the tutorial is poorly written and does not ask you to patch boot_b until suddenly it expects you already having extracted boot_b)
* For some reason, I can only send one EDL command per boot cycle, so after each command I wait for the device to reboot to android (it does automatically) and use the adb reboot edl command to go back to EDL to apply the next command: however, after the edl w command the device is stuck on the boox logo screen, (connected to fastboot mode), but fastboot reboot edl (or fastboot oem commands etc.) is broken
* Because of this I was never able to send the edl reset command, I probably require an EDL cable at this point
* My working hypothesis is that if I can get back into EDL and activate the unmodified boot_b partition I should have a bootable device and fix the faulty boot_a from that point on(and maybe try rooting again)
Given my situation matches the original post closely except only that I have a color gen 2 variant, my next steps will involve investigating the CPU differences before trying the tutorial and maybe finding someone else who ran into a fastboot loop and recovered with the same device I have
If anyone has any tips or recommendations I'm looking forward to hear from the community, thank you