Fastboot not detecting I9300

[R0rt1z2]

Hi there,

I got an old S3 (I9300) on my hands and started following the guide from your blog.

I flashed the "boot part - TWRP" so I could access /dev/block/mmcblk0boot0 and everything went well. As the guide said, I backed up my EFS and my sboot partitions and pulled them to my computer.

Finally, I pushed "u-boot-midas-2018-09-09.bin" and dd'd it to /dev/block/mmcblk0boot0. After that, I did a sanity check with hexdump and everything seemed to be fine:

00000000 a3 69 d3 18 ec ad 6f b0 07 bd 03 b8 02 af 70 af |.i....o.......p.|

So I proceeded to reboot the phone with "reboot download".

The phone powered off and a yellow led started blinking, after 2 seconds the yellow color changed to red (I didn't see blue as the guide says).

I assumed that at this point I was in fastboot so I tried the command "fastboot devices". However, it didn't return anything :(.

lsusb doesn't seem to be able to list the device:

Bus 002 Device 004: ID 1a2c:0043 China Resource Semico Co., Ltd
Bus 002 Device 006: ID 1a2c:4094 China Resource Semico Co., Ltd
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 006: ID 0cf3:9271 Atheros Communications, Inc. AR9271 802.11n
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Any ideas would be appreciated.

Thanks!

[fourkbomb]

Hey!

Sorry for the delayed response. For some reason I don't seem to get emails about issues.

How much power did the phone battery have when you did all this? U-boot won't boot into Linux or fastboot until the battery is at 5%. The yellow flashing light means it's waiting for you to plug it in, the red flashing light means it's charging.