https://bugzilla.kernel.org/show_bug.cgi?id=214823

--- Comment #5 from thanhdatwarriorok@gmail.com ---

Here is an updated log on 5.14.16 kernel

sudo dmesg | grep 'hci'

[ 3489.447794] Bluetooth: hci0: RTL: examining hci_ver=08 hci_rev=000c
lmp_ver=08 lmp_subver=8821
[ 3489.450797] Bluetooth: hci0: RTL: rom_version status=0 version=1
[ 3489.450803] Bluetooth: hci0: RTL: loading rtl_bt/rtl8821c_fw.bin
[ 3489.450817] Bluetooth: hci0: RTL: loading rtl_bt/rtl8821c_config.bin
[ 3489.450829] Bluetooth: hci0: RTL: cfg_sz 10, total sz 31990
[ 3490.156772] Bluetooth: hci0: RTL: fw version 0x829a7644
[16782.570629] usb 1-2: new full-speed USB device number 5 using xhci_hcd

(suspend then resume event)

[26765.726605] Bluetooth: hci0: command 0x041f tx timeout
[26765.726616] Bluetooth: hci0: Timed out waiting for suspend events
[26765.726623] Bluetooth: hci0: Suspend timeout bit: 6
[26765.726646] Bluetooth: hci0: Suspend notifier action (3) failed: -110
[26766.591682] usb 3-1: reset full-speed USB device number 2 using xhci_hcd
[26766.605552] usb 1-4: reset high-speed USB device number 4 using xhci_hcd
[26766.796709] Bluetooth: hci0: RTL: examining hci_ver=08 hci_rev=000c
lmp_ver=08 lmp_subver=8821
[26766.799656] Bluetooth: hci0: RTL: rom_version status=0 version=1
[26766.799662] Bluetooth: hci0: RTL: loading rtl_bt/rtl8821c_fw.bin
[26766.805135] Bluetooth: hci0: RTL: loading rtl_bt/rtl8821c_config.bin
[26766.805399] Bluetooth: hci0: RTL: cfg_sz 10, total sz 31990
[26767.513646] Bluetooth: hci0: RTL: fw version 0x829a7644

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