** Attachment added: "lspci-vnvn.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1790454/+attachment/5183919/+files/lspci-vnvn.log
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1790454 Title: Bluetooth (btintel) stops working aster suspend/resume Status in linux package in Ubuntu: New Bug description: I run cosmic on my Dell Latitude E7470, which has an intel usb bluetooth device (8087:0a2b). Sometimes (not every time) after a suspend/resume cycle, my laptop's bluetooth stops working. hciconfig shows: hci0: Type: Primary Bus: USB BD Address: 00:00:00:00:00:00 ACL MTU: 0:0 SCO MTU: 0:0 DOWN RX bytes:0 acl:0 sco:0 events:0 errors:0 TX bytes:3 acl:0 sco:0 commands:1 errors:0 and dmesg tells me (various combinations of): [237660.728312] Bluetooth: hci0: command tx timeout [237732.339965] Bluetooth: hci0: command 0xfc05 tx timeout [237925.202500] Bluetooth: hci0: Reading Intel version information failed (-110) Trying to reinitialize the device by reloading the driver has no effect: ╰─▶ modprobe -r btusb; modprobe -r btintel; modprobe btintel; modprobe btusb shows in dmesg: [237938.219190] usbcore: deregistering interface driver btusb [237938.601731] usbcore: registered new interface driver btusb [237940.626392] Bluetooth: hci0: Reading Intel version information failed (-110) [237940.626426] Bluetooth: hci0: command tx timeout Strangely enough, reloading the module sometimes does work, upon which the kernel tells me : aug 20 15:36:08 regan kernel: usbcore: deregistering interface driver btusb aug 20 15:36:30 regan kernel: Bluetooth: hci0: Bootloader revision 0.0 build 2 week 52 2014 aug 20 15:36:30 regan kernel: usbcore: registered new interface driver btusb aug 20 15:36:30 regan kernel: Bluetooth: hci0: Device revision is 5 aug 20 15:36:30 regan kernel: Bluetooth: hci0: Secure boot is enabled aug 20 15:36:30 regan kernel: Bluetooth: hci0: OTP lock is enabled aug 20 15:36:30 regan kernel: Bluetooth: hci0: API lock is enabled aug 20 15:36:30 regan kernel: Bluetooth: hci0: Debug lock is disabled aug 20 15:36:30 regan kernel: Bluetooth: hci0: Minimum firmware build 1 week 10 2014 aug 20 15:36:30 regan kernel: Bluetooth: hci0: Found device firmware: intel/ibt-11-5.sfi aug 20 15:36:31 regan kernel: Bluetooth: hci0: Waiting for firmware download to complete aug 20 15:36:31 regan kernel: Bluetooth: hci0: Firmware loaded in 1590852 usecs aug 20 15:36:31 regan kernel: Bluetooth: hci0: Waiting for device to boot aug 20 15:36:31 regan kernel: Bluetooth: hci0: Device booted in 11654 usecs aug 20 15:36:31 regan kernel: Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-11-5.ddc aug 20 15:36:31 regan kernel: Bluetooth: hci0: Applying Intel DDC parameters completed Looking further back in the kernel log, the difference between failed and successful resumes seems to be this: Resume with broken bt: [236481.370814] Restarting tasks ... [236491.580841] Bluetooth: hci0: Reading Intel boot parameters failed (-110) Resume with working bt: [16562.706263] Restarting tasks ... [16562.709034] Bluetooth: hci0: Bootloader revision 0.0 build 2 week 52 2014 [16562.716050] Bluetooth: hci0: Device revision is 5 [16562.716052] Bluetooth: hci0: Secure boot is enabled [16562.716053] Bluetooth: hci0: OTP lock is enabled [16562.716054] Bluetooth: hci0: API lock is enabled [16562.716055] Bluetooth: hci0: Debug lock is disabled [16562.716056] Bluetooth: hci0: Minimum firmware build 1 week 10 2014 [16562.716404] Bluetooth: hci0: Found device firmware: intel/ibt-11-5.sfi [16564.202470] Bluetooth: hci0: Waiting for firmware download to complete [16564.203017] Bluetooth: hci0: Firmware loaded in 1459449 usecs [16564.203091] Bluetooth: hci0: Waiting for device to boot [16564.215021] Bluetooth: hci0: Device booted in 11693 usecs [16564.215080] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-11-5.ddc [16564.219033] Bluetooth: hci0: Applying Intel DDC parameters completed and everything works fine after that. The first kernel on which this error occurred was 4.17.0-6-generic. Before that, I used 4.15.0-25-generic which works perfectly. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1790454/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
