Hi All, To test the code to dynamically switch between SST/SOF support on BYT/CHT from the kernel commandline I merged: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git/log/?h=for-5.11 Into my personal tree (mostly Linus' master + some pending patches from myself). After this I was getting the following errors in dmesg when using sound on a Medion E2228T laptop with a CHT SoC + NAU8824 codec: [ 53.805205] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x1 fw_state 0 [ 53.805479] intel_sst_acpi 808622A8:00: fw returned err -16 [ 53.806281] sst-mfld-platform sst-mfld-platform: ASoC: PRE_PMD: pcm0_in event failed: -16 [ 54.829548] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x1 fw_state 0 [ 54.829596] intel_sst_acpi 808622A8:00: fw returned err -16 [ 54.829668] sst-mfld-platform sst-mfld-platform: ASoC: POST_PMD: media0_out event failed: - [ 55.853230] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x1 fw_state 0 [ 55.853244] intel_sst_acpi 808622A8:00: fw returned err -16 [ 55.853269] sst-mfld-platform sst-mfld-platform: ASoC: POST_PMD: codec_out0 mix 0 event fai [ 56.876435] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x1 fw_state 0 [ 56.876481] intel_sst_acpi 808622A8:00: fw returned err -16 [ 56.876563] sst-mfld-platform sst-mfld-platform: ASoC: POST_PMD: media0_out mix 0 event fai [ 61.847455] intel_sst_acpi 808622A8:00: FW sent error response 0x40015 [ 61.847564] intel_sst_acpi 808622A8:00: fw returned err -1 [ 61.847659] sst-mfld-platform sst-mfld-platform: ASoC: error at snd_soc_dai_startup on ssp2 [ 61.847722] SSP2-Codec: ASoC: BE open failed -1 [ 61.847754] Audio Port: ASoC: failed to start some BEs -1 [ 61.847786] intel_sst_acpi 808622A8:00: FW sent error response 0x40006 [ 64.301284] intel_sst_acpi 808622A8:00: FW sent error response 0x90001 [ 64.301545] intel_sst_acpi 808622A8:00: not suspending FW!!, Err: -2 Dropping the asoc/for-5.11 merge and just cherry-picking Pierre-Louis' changes for the dynamic switching makes these go away. So this seems to be caused by other changes in asoc/for-5.11. So any clues where to start looking for this, or should I just bisect this? Regards, Hans