[OnePlus 8 Questions & Answers] Two Sheets:
I am on stock Android 10 now. I am having troubles installing the 10.5.12 global rom. When I use the flash all bat command line in the rom. It starts fine but hangs with "waiting for device"

Below is what the command prompt says from my Rom flash attempts. The same thing happened 2x. It hangs on < waiting for any device >. I left it on for 30 minutes without progress at that point.

Do you want to wipe all the data ( Reccomended )[Y/N]?y

Erasing 'userdata' OKAY [ 0.275s]

F2FS-tools: mkfs.f2fs Ver: 1.12.0 (2018-11-12)

Info: Disable heap-based policy

Info: Debug level = 1

Info: Trim is disabled

Info: Set conf for android

Info: Segments per section = 1

Info: Sections per zone = 1

Info: sector size = 512

Info: total sectors = 210903704 (102980 MB)

Info: zone aligned segment0 blkaddr: 512

Info: add quota type = 0 => 4

Info: add quota type = 1 => 5

[f2fs_init_sit_area: 535] Filling sit area at offset 0x00600000

[f2fs_init_nat_area: 569] Filling nat area at offset 0x00e00000

[f2fs_write_root_inode:1147] Writing root inode (hot node), 1c000 0 200 at offset 0x00114688

[f2fs_write_default_quota:1223] Writing quota data, at offset 0001c601, 0001c602

[f2fs_write_qf_inode:1318] Writing quota inode (hot node), 1c000 0 200 at offset 0x00114689

[f2fs_write_default_quota:1223] Writing quota data, at offset 0001c603, 0001c604

[f2fs_write_qf_inode:1318] Writing quota inode (hot node), 1c000 0 200 at offset 0x00114690

[f2fs_update_nat_root:1372] Writing nat root, at offset 0x00000e00

[f2fs_add_default_dentry_root:1567] Writing default dentry root, at offset 0x0001c600

Info: Overprovision ratio = 0.620%

Info: Overprovision segments = 645 (GC reserved = 330)

[f2fs_write_check_point_pack: 713] Writing main segments, cp at offset 0x00000200

[f2fs_write_check_point_pack: 850] Writing Segment summary for HOT/WARM/COLD_DATA, at offset 0x00000201

[f2fs_write_check_point_pack: 877] Writing Segment summary for HOT_NODE, at offset 0x00000202

[f2fs_write_check_point_pack: 889] Writing Segment summary for WARM_NODE, at offset 0x00000203

[f2fs_write_check_point_pack: 900] Writing Segment summary for COLD_NODE, at offset 0x00000204

[f2fs_write_check_point_pack: 908] Writing cp page2, at offset 0x00000205

[f2fs_write_check_point_pack: 928] Writing NAT bits pages, at offset 0x000003fe

[f2fs_write_check_point_pack: 949] Writing cp page 1 of checkpoint pack 2, at offset 0x00000400

[f2fs_write_check_point_pack: 968] Writing cp page 2 of checkpoint pack 2, at offset 0x00000405

[f2fs_write_super_block:1001] Writing super block, at offset 0x00000000

Info: format successful

Sending 'userdata' (85 KB) OKAY [ 0.009s]

Writing 'userdata' OKAY [ 0.002s]

Erasing 'metadata' OKAY [ 0.001s]

Erase successful, but not automatically formatting.

File system type raw not supported.

Finished. Total time: 6.233s

Sending 'boot_a' (98304 KB) OKAY [ 2.271s]

Writing 'boot_a' OKAY [ 0.413s]

Finished. Total time: 2.780s

Sending 'dtbo' (8192 KB) OKAY [ 0.191s]

Writing 'dtbo' OKAY [ 0.043s]

Finished. Total time: 0.253s

Sending 'modem_a' (524288 KB) OKAY [ 12.122s]

Writing 'modem_a' OKAY [ 1.955s]

Finished. Total time: 14.523s

Sending 'recovery' (102400 KB) OKAY [ 2.361s]

Writing 'recovery' OKAY [ 0.392s]

Finished. Total time: 2.857s

Sending 'vbmeta' (8 KB) OKAY [ 0.008s]

Writing 'vbmeta' OKAY [ 0.001s]

Finished. Total time: 0.021s

Sending 'vbmeta_system' (4 KB) OKAY [ 0.010s]

Writing 'vbmeta_system' OKAY [ 0.001s]

Finished. Total time: 0.023s

Rebooting into fastboot OKAY [ 0.002s]

< waiting for any device >