我在一台以前运行 Windows 的旧笔记本电脑上安装了 Ubuntu 20.04。运行 Windows 时，蓝牙很稳定。在 Ubuntu 20.04 上，使用笔记本电脑一段时间后，蓝牙会关闭。有时是半小时，有时是几个小时，但突然间，蓝牙关闭了，无法再次打开。
我尝试过使用bluetoothctl重新打开电源，但得到的答案不同。有时它说“权力更替成功”即使没有，有时也会显示类似失败的信息（下次发生时会添加正确的行）。
我的系统配置如下：
lspci
00:00.0 Host bridge: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series SoC Transaction Register (rev 35)
00:02.0 VGA compatible controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Integrated Graphics Controller (rev 35)
00:0b.0 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series Power Management Controller (rev 35)
00:14.0 USB controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series USB xHCI Controller (rev 35)
00:1a.0 Encryption controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series Trusted Execution Engine (rev 35)
00:1b.0 Audio device: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series High Definition Audio Controller (rev 35)
00:1c.0 PCI bridge: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series PCI Express Port #1 (rev 35)
00:1c.2 PCI bridge: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series PCI Express Port #3 (rev 35)
00:1f.0 ISA bridge: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series PCU (rev 35)
00:1f.3 SMBus: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx SMBus Controller (rev 35)
02:00.0 Network controller: Intel Corporation Wireless 7260 (rev cb)
我一生都在使用 Windows，这次是尝试切换到 Linux。我必须承认，有了这个版本，事情变得比以前容易多了。
我真的很想解决这个问题，并愿意提供任何有关系统的信息来帮助我。
最近，我在蓝牙连接 45 分钟后收到此消息：
bluetoothctl Agent registered
[CHG] Device 00:1F:20:35:7F:61 Connected: no
[CHG] Controller 7C:5C:F8:F3:CD:51 Powered: no
[CHG] Controller 7C:5C:F8:F3:CD:51 Discovering: no
[CHG] Controller 7C:5C:F8:F3:CD:51 Pairable: no
[bluetooth]
# power on [bluetooth]
# power off Changing power off succeeded [bluetooth]
# power on Changing power on succeeded
Failed to set power on: org.bluez.Error.Failed
当连接失败时，将记录此事件：drops: Bluetooth: hci0: unexpected event for opcode 0xfc2f
sudo dmesg | grep -i blue
[ 6.595832] Bluetooth: Core ver 2.22
[ 6.595923] Bluetooth: HCI device and connection manager initialized
[ 6.595932] Bluetooth: HCI socket layer initialized
[ 6.595935] Bluetooth: L2CAP socket layer initialized
[ 6.595943] Bluetooth: SCO socket layer initialized
[ 6.877274] Bluetooth: hci0: read Intel version: 3707100180012d0d00
[ 6.881131] Bluetooth: hci0: Intel Bluetooth firmware file: intel/ibt-hw-37.7.10-fw-1.80.1.2d.d.bseq
[ 7.066253] Bluetooth: hci0: unexpected event for opcode 0xfc2f
[ 7.081277] Bluetooth: hci0: Intel firmware patch completed and activated
[ 10.332093] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 10.332096] Bluetooth: BNEP filters: protocol multicast
[ 10.332104] Bluetooth: BNEP socket layer initialized
[ 47.340916] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[ 47.340926] Bluetooth: HIDP socket layer initialized
[ 47.354895] input: Logitech Bluetooth Mouse M555b Mouse as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/bluetooth/hci0/hci0:256/0005:046D:B009.0001/input/input11
[ 47.355648] hid-generic 0005:046D:B009.0001: input,hidraw0: BLUETOOTH HID v4.19 Mouse [Logitech Bluetooth Mouse M555b] on 7c:5c:f8:f3:cd:51
[ 56.928757] Bluetooth: RFCOMM TTY layer initialized
[ 56.928769] Bluetooth: RFCOMM socket layer initialized
[ 56.928780] Bluetooth: RFCOMM ver 1.11
[ 1342.898738] Bluetooth: hci0: read Intel version: 3707100180012d0d00
[ 1342.898747] Bluetooth: hci0: Intel Bluetooth firmware file: intel/ibt-hw-37.7.10-fw-1.80.1.2d.d.bseq
[ 1343.083723] Bluetooth: hci0: unexpected event for opcode 0xfc2f
[ 1343.098752] Bluetooth: hci0: Intel firmware patch completed and activated
[ 1346.358720] input: Logitech Bluetooth Mouse M555b Mouse as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/bluetooth/hci0/hci0:256/0005:046D:B009.0002/input/input13
[ 1346.360283] hid-generic 0005:046D:B009.0002: input,hidraw0: BLUETOOTH HID v4.19 Mouse [Logitech Bluetooth Mouse M555b] on 7c:5c:f8:f3:cd:51
lsusb -v | grep -A 10 -i blue
can't get debug descriptor: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable
bDeviceProtocol 1 Bluetooth
bMaxPacketSize0 64
idVendor 0x8087 Intel Corp.
idProduct 0x07dc
bcdDevice 0.01
iManufacturer 0
iProduct 0
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
--
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
--
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
--
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0009 1x 9 bytes
--
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
can't get device qualifier: Resource temporarily unavailable
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0011 1x 17 bytes
--
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0019 1x 25 bytes
--
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0021 1x 33 bytes
--
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0031 1x 49 bytes
can't get debug descriptor: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable
can't get device qualifier: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable
运行 Adupa 建议的命令：
uname -a; lspci -nnk | grep -iA2 net; lsusb; dmesg | grep -i bluetooth; dmesg | grep -i firmware; lsmod | grep bluetooth
Linux axbuntu 5.4.0-33-generic #37-Ubuntu SMP Thu May 21 12:53:59 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
02:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b1] (rev cb)
Subsystem: Intel Corporation Dual Band Wireless-AC 7260 [8086:4c70]
Kernel driver in use: iwlwifi
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 0bda:57b5 Realtek Semiconductor Corp. USB Camera
Bus 001 Device 003: ID 8087:07dc Intel Corp.
Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 002: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[ 6.491119] Bluetooth: Core ver 2.22
[ 6.502736] Bluetooth: HCI device and connection manager initialized
[ 6.502744] Bluetooth: HCI socket layer initialized
[ 6.502747] Bluetooth: L2CAP socket layer initialized
[ 6.502770] Bluetooth: SCO socket layer initialized
[ 6.719436] Bluetooth: hci0: read Intel version: 3707100180012d0d00
[ 6.723005] Bluetooth: hci0: Intel Bluetooth firmware file: intel/ibt-hw-37.7.10-fw-1.80.1.2d.d.bseq
[ 6.926410] Bluetooth: hci0: unexpected event for opcode 0xfc2f
[ 6.941453] Bluetooth: hci0: Intel firmware patch completed and activated
[ 12.064240] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 12.064243] Bluetooth: BNEP filters: protocol multicast
[ 12.064250] Bluetooth: BNEP socket layer initialized
[ 46.652461] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[ 46.652474] Bluetooth: HIDP socket layer initialized
[ 46.674697] input: Logitech Bluetooth Mouse M555b Mouse as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/bluetooth/hci0/hci0:256/0005:046D:B009.0001/input/input11
[ 46.678068] hid-generic 0005:046D:B009.0001: input,hidraw0: BLUETOOTH HID v4.19 Mouse [Logitech Bluetooth Mouse M555b] on 7c:5c:f8:f3:cd:51
[ 59.322839] Bluetooth: RFCOMM TTY layer initialized
[ 59.322850] Bluetooth: RFCOMM socket layer initialized
[ 59.322862] Bluetooth: RFCOMM ver 1.11
[ 0.160706] Spectre V2 : Enabling Restricted Speculation for firmware calls
[ 0.245143] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[ 6.039318] elan_i2c i2c-ELAN1000:00: Elan Touchpad: Module ID: 0x0005, Firmware: 0x0004, Sample: 0x000d, IAP: 0x000e
[ 6.505681] iwlwifi 0000:02:00.0: loaded firmware version 17.3216344376.0 op_mode iwlmvm
[ 6.723005] Bluetooth: hci0: Intel Bluetooth firmware file: intel/ibt-hw-37.7.10-fw-1.80.1.2d.d.bseq
[ 6.941453] Bluetooth: hci0: Intel firmware patch completed and activated
bluetooth 581632 36 btrtl,hidp,btintel,btbcm,bnep,btusb,rfcomm
ecdh_generic 16384 2 bluetooth
真的不知道这应该告诉我什么，但我也运行了更新。我会在白天进行测试，看看是否能解决问题。
更新：不幸的是，更新驱动程序后问题仍然存在。