我的蓝牙无法使用。我在这里看到的所有人都遇到了同样的问题，“没有可用的默认控制器”，但我尝试了所有方法，但都不起作用。
我的dmesg：
sudo dmesg |egrep -i "wifi|blue|fw|firm"
[ 2.563811] ata1.00: ATA-9: SSD 240GB, FW200326, max UDMA/133
[ 12.073130] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
[ 13.278796] [drm] Found UVD firmware Version: 1.130 Family ID: 16
[ 13.299519] [drm] Found VCE firmware Version: 53.26 Binary ID: 3
[ 21.787126] audit: type=1400 audit(1690129650.702:129): apparmor="DENIED" operation="connect" class="file" profile="snap.bluez.obex" name="/run/dbus/system_bus_socket" pid=1168 comm="obexd" requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[ 21.799589] audit: type=1400 audit(1690129650.714:130): apparmor="DENIED" operation="create" class="net" profile="snap.bluez.bluez" pid=1167 comm="bluetoothd" family="bluetooth" sock_type="raw" protocol=1 requested_mask="create" denied_mask="create"
[ 21.846680] audit: type=1400 audit(1690129650.762:131): apparmor="DENIED" operation="connect" class="file" profile="snap.bluez.bluez" name="/run/dbus/system_bus_socket" pid=1167 comm="bluetoothd" requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[ 22.366167] audit: type=1400 audit(1690129651.282:132): apparmor="DENIED" operation="create" class="net" profile="snap.bluez.bluez" pid=1653 comm="bluetoothd" family="bluetooth" sock_type="raw" protocol=1 requested_mask="create" denied_mask="create"
[ 22.366409] audit: type=1400 audit(1690129651.282:133): apparmor="DENIED" operation="connect" class="file" profile="snap.bluez.bluez" name="/run/dbus/system_bus_socket" pid=1653 comm="bluetoothd" requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[ 22.368504] audit: type=1400 audit(1690129651.282:134): apparmor="DENIED" operation="connect" class="file" profile="snap.bluez.obex" name="/run/dbus/system_bus_socket" pid=1654 comm="obexd" requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[ 22.650265] audit: type=1400 audit(1690129651.566:135): apparmor="DENIED" operation="create" class="net" profile="snap.bluez.bluez" pid=1704 comm="bluetoothd" family="bluetooth" sock_type="raw" protocol=1 requested_mask="create" denied_mask="create"
[ 22.650456] audit: type=1400 audit(1690129651.566:136): apparmor="DENIED" operation="connect" class="file" profile="snap.bluez.bluez" name="/run/dbus/system_bus_socket" pid=1704 comm="bluetoothd" requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[ 219.003648] Bluetooth: Core ver 2.22
[ 219.003681] NET: Registered PF_BLUETOOTH protocol family
[ 219.003683] Bluetooth: HCI device and connection manager initialized
[ 219.003686] Bluetooth: HCI socket layer initialized
[ 219.003689] Bluetooth: L2CAP socket layer initialized
[ 219.003693] Bluetooth: SCO socket layer initialized
[ 219.024251] Bluetooth: hci0: CSR: Setting up dongle with HCI ver=6 rev=0709; LMP ver=6 subver=0709; manufacturer=10
[ 219.024257] Bluetooth: hci0: CSR: Unbranded CSR clone detected; adding workarounds and force-suspending once...
[ 219.324248] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 219.324261] Bluetooth: BNEP filters: protocol multicast
[ 219.324272] Bluetooth: BNEP socket layer initialized
[ 219.437786] Bluetooth: hci0: HCI Delete Stored Link Key command is advertised, but not supported.
[ 219.437797] Bluetooth: hci0: HCI Read Default Erroneous Data Reporting command is advertised, but not supported.
[ 219.437802] Bluetooth: hci0: HCI Set Event Filter command not supported.
[ 220.109828] Bluetooth: hci0: Opcode 0x2003 failed: -19
[ 226.470340] Bluetooth: hci0: CSR: Setting up dongle with HCI ver=6 rev=0709; LMP ver=6 subver=0709; manufacturer=10
[ 226.470357] Bluetooth: hci0: CSR: Unbranded CSR clone detected; adding workarounds and force-suspending once...
[ 226.470364] Bluetooth: hci0: CSR: Couldn't suspend the device for our Barrot 8041a02 receive-issue workaround
[ 226.470465] Bluetooth: hci0: HCI Delete Stored Link Key command is advertised, but not supported.
[ 226.470473] Bluetooth: hci0: HCI Read Default Erroneous Data Reporting command is advertised, but not supported.
[ 226.470478] Bluetooth: hci0: HCI Set Event Filter command not supported.
[ 228.497537] Bluetooth: hci0: command 0x2003 tx timeout
[ 228.497539] Bluetooth: hci0: Opcode 0x2003 failed: -110
[ 252.967683] audit: type=1107 audit(1690129881.882:158): pid=1037 uid=103 auid=4294967295 ses=4294967295 subj=unconfined msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/" interface="org.freedesktop.DBus.ObjectManager" member="GetManagedObjects" mask="send" name="org.bluez" pid=5671 label="snap.brave.brave" peer_pid=5246 peer_label="unconfined"
[ 327.762425] rtlwifi: AP off, try to reconnect now
[ 1674.336648] Bluetooth: hci0: CSR: Setting up dongle with HCI ver=6 rev=0709; LMP ver=6 subver=0709; manufacturer=10
[ 1674.336654] Bluetooth: hci0: CSR: Unbranded CSR clone detected; adding workarounds and force-suspending once...
[ 1674.336660] Bluetooth: hci0: CSR: Couldn't suspend the device for our Barrot 8041a02 receive-issue workaround
[ 1674.336663] Bluetooth: hci0: HCI Delete Stored Link Key command is advertised, but not supported.
[ 1674.336664] Bluetooth: hci0: HCI Read Default Erroneous Data Reporting command is advertised, but not supported.
[ 1674.336666] Bluetooth: hci0: HCI Set Event Filter command not supported.
[ 1676.356017] Bluetooth: hci0: Opcode 0x2003 failed: -110
[ 1688.815219] Bluetooth: hci0: CSR: Setting up dongle with HCI ver=6 rev=0709; LMP ver=6 subver=0709; manufacturer=10
[ 1688.815225] Bluetooth: hci0: CSR: Unbranded CSR clone detected; adding workarounds and force-suspending once...
[ 1688.815230] Bluetooth: hci0: CSR: Couldn't suspend the device for our Barrot 8041a02 receive-issue workaround
[ 1688.815232] Bluetooth: hci0: HCI Delete Stored Link Key command is advertised, but not supported.
[ 1688.815234] Bluetooth: hci0: HCI Read Default Erroneous Data Reporting command is advertised, but not supported.
[ 1688.815235] Bluetooth: hci0: HCI Set Event Filter command not supported.
[ 1690.853400] Bluetooth: hci0: command 0x2003 tx timeout
[ 1690.853403] Bluetooth: hci0: Opcode 0x2003 failed: -110
[ 2032.174959] Bluetooth: RTBT_Tb: vendor=0x1814, device=0x3298
[ 2032.174970] Bluetooth: RTBT_Tb: vendor=0x0, device=0x0
[ 2032.174976] Bluetooth: DynamicAlloc pci_device_id table at 0x000000007714d335 with size 80
[ 2032.174985] Bluetooth: RTBT_Tb: vendor=0x1814, device=0x3298
[ 2032.174991] Bluetooth: Convert: vendor=0x1814, device=0x3298
[ 2032.174995] Bluetooth: RTBT_Tb: vendor=0x0, device=0x0
[ 2032.175000] Bluetooth: pci_device_id: vendor=0x1814, device=0x3298