[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] mistersixt:
Hi all... I just got my OnePlus-6T and did the following installation steps:

o) Did OEM unlock.

o) Flashed latest firmware 10.3.4-OnePlus6TOxygen_34_OTA_046_all_2005052113 via fastboot, booted OxygenOS.

o) Installed latest LineageOS recovery

o) Ran "copy-partitions.zip" (A to B) via ADB like described in the installation instruction

o) Installed LineageOS 17.1 version 20200730.

Now, all is well... apart from the device not playing any(!) sound: neither the device itself, nor via a BT headphone, and not even via Chromast streaming. The notification beep is working fine though. Also, just figured, when playing videos I get maybe 1 pic per second.

What did I miss? Any help is welcome,

kind regards, and thanks in advance,

mistersixt.

[edit: log cat can be found here: https://www.jabber-germany.de/tmp/log.cat ... one can see errors like this:

07-31 18:43:59.042 787 5286 D audio_hw_primary: start_output_stream: enter: stream(0xeb869800)usecase(0: deep-buffer-playback) devices(0x2) is_haptic_usecase(0)
07-31 18:43:59.043 787 5286 D audio_hw_primary: select_devices for use case (deep-buffer-playback)
07-31 18:43:59.044 787 5286 D msm8974_platform: platform_split_snd_device: snd_device(6) num devices(1) new_snd_devices(0)
07-31 18:43:59.044 787 5286 D msm8974_platform: platform_check_codec_backend_cfg:napb: (0) - (low-latency-playback)id (1) sr 48000 bw (16) ch (2) device speaker
07-31 18:43:59.044 787 5286 D msm8974_platform: platform_check_codec_backend_cfg:becf: afe: playback on codec device not supporting native playback set default Sample Rate(48k)
07-31 18:43:59.044 787 5286 D audio_hw_primary: check_usecases_codec_backend:becf: force routing 0
07-31 18:43:59.044 787 5286 D audio_hw_primary: check_usecases_codec_backend:becf: (71) check_usecases curr device: speaker, usecase device:speaker backends match 1
07-31 18:43:59.044 787 5286 E msm8974_platform: platform_check_backends_match: Invalid snd_device =
07-31 18:43:59.044 787 5286 D audio_hw_primary: check_usecases_codec_backend:becf: (71) check_usecases curr device: speaker, usecase device: backends match 0
07-31 18:43:59.044 787 5286 D audio_hw_primary: check_usecases_codec_backend:becf: check_usecases num.of Usecases to switch 0
07-31 18:43:59.044 787 5286 D msm8974_platform: platform_split_snd_device: snd_device(6) num devices(0) new_snd_devices(0)
07-31 18:43:59.044 787 5286 D msm8974_platform: platform_split_snd_device: snd_device(6) num devices(0) new_snd_devices(0)
07-31 18:43:59.044 787 5286 E soundtrigger: audio_extn_sound_trigger_update_stream_status: invalid input device 0x0, for event 3
07-31 18:43:59.045 787 5286 D soundtrigger: audio_extn_sound_trigger_update_stream_status: uc_info->id 0 of type 0 for Event 3, with Raise=1
07-31 18:43:59.045 787 5286 D sound_trigger_platform: platform_stdev_check_and_update_concurrency: dedicated path 0, reset backend 1, tx 0, rx 1,concurrency session allowed
07-31 18:43:59.045 787 5286 D audio_hw_utils: audio_extn_utils_send_app_type_cfg: usecase->out_snd_device speaker
07-31 18:43:59.045 787 5286 D msm8974_platform: platform_split_snd_device: snd_device(6) num devices(0) new_snd_devices(0)
07-31 18:43:59.045 787 5286 D audio_hw_utils: audio_extn_btsco_get_sample_rate:Not a BT SCO device, need not update sampling rate
07-31 18:43:59.047 787 5286 D msm8974_platform: platform_split_snd_device: snd_device(6) num devices(1) new_snd_devices(0)
07-31 18:43:59.047 787 5286 D audio_hw_utils: audio_extn_btsco_get_sample_rate:Not a BT SCO device, need not update sampling rate
07-31 18:43:59.047 787 5286 D ACDB-LOADER: ACDB -> send_audio_cal, acdb_id = 15, path = 0, app id = 0x11130, sample rate = 48000
07-31 18:43:59.049 787 5286 D msm8974_platform: platform_split_snd_device: snd_device(6) num devices(0) new_snd_devices(0)
07-31 18:43:59.049 787 5286 D audio_hw_primary: enable_audio_route: apply mixer and update path: deep-buffer-playback quat_i2s
07-31 18:43:59.049 787 5286 D audio_route: Apply path: deep-buffer-playback quat_i2s
07-31 18:43:59.050 787 5286 D audio_hw_primary: select_devices: done
07-31 18:43:59.074 787 5286 E audio_hw_primary: pcm_open_prepare_helper: pcm_prepare returned -1
07-31 18:43:59.079 787 5286 D audio_hw_primary: disable_audio_route: reset and update mixer path: deep-buffer-playback quat_i2s
07-31 18:43:59.082 787 5286 E soundtrigger: audio_extn_sound_trigger_update_stream_status: invalid input device 0x0, for event 2
07-31 18:43:59.082 787 5286 D soundtrigger: audio_extn_sound_trigger_update_stream_status: uc_info->id 0 of type 0 for Event 2, with Raise=1
07-31 18:43:59.082 787 5286 D sound_trigger_platform: platform_stdev_check_and_update_concurrency: dedicated path 0, reset backend 1, tx 0, rx 0,concurrency session allowed
07-31 18:43:59.082 787 5286 D msm8974_platform: platform_split_snd_device: snd_device(6) num devices(0) new_snd_devices(0)
07-31 18:43:59.082 787 5286 D msm8974_platform: platform_split_snd_device: snd_device(6) num devices(0) new_snd_devices(0)
07-31 18:43:59.132 787 5286 D audio_hw_primary: out_standby: enter: stream (0xeb869800) usecase(0: deep-buffer-playback)
07-31 18:43:59.132 787 5286 D audio_hw_primary: out_standby: exit

[/edit]