I have a Raspberry Pi Zero 2W with VenusOS firmware 3.13. It works fine, but /var/log/messages is spammed with Bluetooth error messages. It amounts to 100K every 10 minutes, which means that I don't have more than about 1 hour of history:
$ ls -ltr /var/log/messages* -rw-r--r-- 1 root root 102492 Jan 16 07:43 /var/log/messages.5 -rw-r--r-- 1 root root 102492 Jan 16 07:52 /var/log/messages.4 -rw-r--r-- 1 root root 102479 Jan 16 08:02 /var/log/messages.3 -rw-r--r-- 1 root root 102467 Jan 16 08:12 /var/log/messages.2 -rw-r--r-- 1 root root 102406 Jan 16 08:22 /var/log/messages.1 -rw-r--r-- 1 root root 102492 Jan 16 08:32 /var/log/messages.0 -rw-r--r-- 1 root root 642 Jan 16 08:32 /var/log/messages
Here are the messages that are repeated every 10 seconds:
Jan 16 07:23:02 raspberrypi2 user.err kernel: [11986.963002] debugfs: File 'dut_mode' in directory 'hci0' already present! Jan 16 07:23:02 raspberrypi2 user.err kernel: [11986.969956] debugfs: File 'vendor_diag' in directory 'hci0' already present! Jan 16 07:23:05 raspberrypi2 user.err kernel: [11989.850713] Bluetooth: hci0: command 0xfc18 tx timeout Jan 16 07:23:13 raspberrypi2 user.err kernel: [11997.930756] Bluetooth: hci0: BCM: failed to write update baudrate (-110) Jan 16 07:23:13 raspberrypi2 user.err kernel: [11997.937479] Bluetooth: hci0: Failed to set baudrate Jan 16 07:23:13 raspberrypi2 user.info kernel: [11998.064492] Bluetooth: hci0: BCM: chip id 115 Jan 16 07:23:13 raspberrypi2 user.info kernel: [11998.070844] Bluetooth: hci0: BCM: features 0x0e Jan 16 07:23:13 raspberrypi2 user.info kernel: [11998.098259] Bluetooth: hci0: BCM43430B0 Jan 16 07:23:13 raspberrypi2 user.info kernel: [11998.102150] Bluetooth: hci0: BCM (002.001.012) build 0000 Jan 16 07:23:13 raspberrypi2 user.err kernel: [11998.107632] Bluetooth: hci0: BCM: firmware Patch file not found, tried: Jan 16 07:23:13 raspberrypi2 user.err kernel: [11998.114281] Bluetooth: hci0: BCM: 'brcm/BCM.hcd'