4.978620] rtk_btusb: Realtek Bluetooth USB driver ver 3.1.981c756.20211102-175222
[ 5.022481] rtk_btusb: btusb_probe intf->cur_altsetting->desc.bInterfaceNumber 0
[ 5.030838] rtk_btusb: btusb_probe can_wakeup 1, may wakeup 0
[ 5.037302] rtk_btusb: patch_add
[ 5.040933] rtk_btusb: auto suspend is disabled
[ 5.046015] rtk_btusb: pid = 0xd723
[ 5.049973] rtk_btusb: patch_add: Reset gEVersion to 0xff
[ 5.056060] rtk_btusb: set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
[ 5.068458] rtk_btusb: btusb_probe: done
[ 5.072425] rtk_btusb: btusb_open start
[ 5.073136] usbcore: registered new interface driver rtk_btusb
[ 5.077168] rtk_btusb: btusb_open hdev->promisc ==0
[ 5.099514] rtk_btusb: download_patch start
[ 5.104220] rtk_btusb: chip type value: 0x71
[ 5.115795] rtk_btusb: HCI reset.
[ 5.169212] rtk_btusb: read_ver_rsp->lmp_subver = 0x8723
[ 5.175177] rtk_btusb: read_ver_rsp->hci_rev = 0xd
[ 5.175181] rtk_btusb: patch_entry->lmp_sub = 0x8723
[ 5.175184] rtk_btusb: load_firmware start
[ 5.175188] rtk_btusb: lmp_version = 0x8723
[ 5.175191] rtk_btusb: config filename rtl8723du_config
[ 5.175412] usb 1-1.1: Direct firmware load for rtl8723du_config failed with error -2
[ 5.175424] rtk_btusb: fw name is rtl8723du_fw
[ 5.179453] usb 1-1.1: Direct firmware load for rtl8723du_fw failed with error -2
[ 5.219000] rtk_btusb: load firmware failed!
[ 5.232288] rtk_btusb: Rtk patch end -1
[ 5.257784] rtk_btusb: btusb_open failed
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