nRF5340 CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL works in ncs 2.6.0, but times out in 2.7.0 for connection

[denis]

Our app uses the nRF5340.  We use CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL so that we can change the tx power for advertisements and connections.  When using ncs 2.6.0 it seems to work fine.  When building with 2.7.0 then it still works for advertisements, but when connected and we set the tx power the bt_hci_cmd_send_sync BT_HCI_OP_VS_WRITE_TX_POWER_LEVEL times out in bt_hci_cmd_send_sync and that does a kernel oops.

Any ideas what might be going wrong?

[Kenneth]

Hello,

I am not aware of any issue, are you able to provide a simplified example I can use to recreate this?

Maybe also share the .config and zephyr.dts from the build output.

Kenneth

[denis]

5078.peripheral_lbs.zip

This is the led button sample for the nRF5340DK modified to set the tx power level when connected to.  When I try to connect I end up in arch_system_halt.

[denis]

This is a fairly critical issue for us.  Any updates or thoughts on how we can debug here?

[Kenneth]

Strange indeed, I have asked internally on this one, as I were not able to identify the problem myself. Will let you know what I learn.

Kenneth

[Kenneth]

Hello again,

I might have found the problem. Try to set CONFIG_BT_CTLR_LE_POWER_CONTROL=y also.

Kenneth

[denis]

I added that to child_image/hci_ipc.copnf in the example I sent above.  Still seeing the same halt.

[Kenneth]

Hmm.. It works here. Can you delete the build folder and try again? Make sure to build without sysbuild if you are using child_image.

Kenneth