summary of the problem:
bluetooth stops working upon resume from a "sleep", on 19.04 (using latest bluez version that is available right now)
hardware / software:
Description: Ubuntu 19.04 % dpkg --status bluez | grep '^Version:' Version: 5.50-0ubuntu2 % lsmod | grep -i blue bluetooth 557056 23 btrtl,btintel,btbcm,bnep,btusb,rfcomm ecdh_generic 28672 1 bluetooth % lspci -k 06:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78) Subsystem: Intel Corporation Dual Band Wireless-AC 8265 Kernel driver in use: iwlwifi Kernel modules: iwlwifi % lsusb Bus 001 Device 004: ID 8087:0a2b Intel Corp. % usb-devices T: Bus=01 Lev=01 Prnt=01 Port=08 Cnt=06 Dev#= 4 Spd=12 MxCh= 0 D: Ver= 2.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=8087 ProdID=0a2b Rev=00.10 C: #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA I: If#=0x0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb I: If#=0x1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb observations:
dmesg shows a timeout
% dmesg | grep -i blue [ 8.854203] Bluetooth: Core ver 2.22 [ 8.854213] Bluetooth: HCI device and connection manager initialized [ 8.854215] Bluetooth: HCI socket layer initialized [ 8.854216] Bluetooth: L2CAP socket layer initialized [ 8.854217] Bluetooth: SCO socket layer initialized [ 8.887056] Bluetooth: hci0: Firmware revision 0.1 build 43 week 1 2019 [ 9.791115] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 9.791117] Bluetooth: BNEP filters: protocol multicast [ 9.791120] Bluetooth: BNEP socket layer initialized [ 22.415492] Bluetooth: RFCOMM TTY layer initialized [ 22.415498] Bluetooth: RFCOMM socket layer initialized [ 22.415502] Bluetooth: RFCOMM ver 1.11 [ 35.357910] hid-generic 0005:046D:B01D.0005: input,hidraw4: BLUETOOTH HID v0.16 Mouse [MX Ergo] on C0:B6:F9:70:BC:27 [350513.404651] Bluetooth: hci0: Firmware revision 0.1 build 43 week 1 2019 [389661.535751] hid-generic 0005:046D:B01D.0009: input,hidraw4: BLUETOOTH HID v0.16 Mouse [MX Ergo] on C0:B6:F9:70:BC:27 [404929.368630] Bluetooth: hci0: SCO packet for unknown connection handle 0 [404929.368636] Bluetooth: hci0: SCO packet for unknown connection handle 0 [404929.378628] Bluetooth: hci0: SCO packet for unknown connection handle 0 [404929.378630] Bluetooth: hci0: SCO packet for unknown connection handle 0 [404929.378631] Bluetooth: hci0: SCO packet for unknown connection handle 0 [404929.388647] Bluetooth: hci0: SCO packet for unknown connection handle 0 [404940.041477] Bluetooth: hci0: SCO packet for unknown connection handle 260 [404940.041484] Bluetooth: hci0: SCO packet for unknown connection handle 260 [404940.041487] Bluetooth: hci0: SCO packet for unknown connection handle 260 [431287.519594] Bluetooth: hci0: last event is not cmd complete (0x00) [431287.519604] Bluetooth: hci0: last event is not cmd complete (0x00) [431287.519640] Bluetooth: hci0: Reading Intel version information failed (-61) [431289.423079] Bluetooth: hci0: command tx timeout bluetoothctl cannot see the bluetooth adapter
% sudo bluetoothctl Agent registered [bluetooth]# power off No default controller available other posts mentioned rfkill list, mine is not blocked
% rfkill list 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no 3: hci0: Bluetooth Soft blocked: no Hard blocked: no hcitool does not show any devices. i think this is a issue
% hcitool dev Devices: hci0 is DOWN
% hciconfig hci0: Type: Primary Bus: USB BD Address: 00:00:00:00:00:00 ACL MTU: 0:0 SCO MTU: 0:0 DOWN RX bytes:76 acl:0 sco:0 events:2 errors:0 TX bytes:3 acl:0 sco:0 commands:1 errors:0 i reset and it now appears UP
% sudo hciconfig hci0 reset % hciconfig hci0: Type: Primary Bus: USB BD Address: C0:B6:F9:70:BC:27 ACL MTU: 1021:4 SCO MTU: 96:6 UP RUNNING RX bytes:901 acl:0 sco:0 events:56 errors:0 TX bytes:454 acl:0 sco:0 commands:45 errors:0 % hcitool dev Devices: hci0 C0:B6:F9:70:BC:27 however bluetoothctl still reports no controller is available
[bluetooth]# devices No default controller available still seeing hci0 report issue reading the Intel info
[481037.880552] Bluetooth: hci0: Reading Intel version information failed (-61) [481039.889836] Bluetooth: hci0: command tx timeout [481570.804750] Bluetooth: hci0: Firmware revision 0.1 build 43 week 1 2019 troubleshooting steps taken:
- restart bluetooh.service, but the problem persists.
- a reboot (or multiple sometimes) will fix the bluetooth issue. though it returns after subsequent suspend (issue is not seen every time).
i found this open bug that sounds similar, but have not yet tested i am hitting the same problem (patch is available to try). adding it here in case others hit this same issue.
workaround:
- issue does NOT occur if i "lock/unlock" the user session (instead of using sleep). uptime is 27days (and counting) using this method.
1 Answer
I saw a similar error with message Reading Intel version information failed (-110), before this error, I didn't do any system configure change.
From hint from A bug report of ubuntu, I tried several operations about power plug, such as restart system with power plugged and restart system with power unplugged. And the problem is missing finally.
I agree the bug is related to power plug.
