After 10 days of zero issues, I am convinced that the problem is with linux-firmware and not kernel. I've changed affected package accordingly.
** Package changed: linux (Ubuntu) => linux-firmware (Ubuntu) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-firmware in Ubuntu. https://bugs.launchpad.net/bugs/2073047 Title: Regression on Linux 6.8.0-38: Bluetooth adapter (Intel AX200) stops working after a few suspend/resume cycles Status in linux-firmware package in Ubuntu: Triaged Bug description: After upgrading to Linux 6.8.0-38, Bluetooth adapter (USB part of the Intel AX200) stops working after a few suspend/resume cycles. WiFi (PCIe part) continues to work as expected. Kernel log shows: Bluetooth: hci0: Reading Intel version command failed (-110) instead of the usual: Bluetooth: hci0: Bootloader revision 0.3 build 0 week 24 2017 Bluetooth: hci0: Device revision is 1 Bluetooth: hci0: Secure boot is enabled Bluetooth: hci0: OTP lock is enabled Bluetooth: hci0: API lock is enabled Bluetooth: hci0: Debug lock is disabled Bluetooth: hci0: Minimum firmware build 1 week 10 2014 Bluetooth: hci0: Found device firmware: intel/ibt-20-1-3.sfi Bluetooth: hci0: Boot Address: 0x24800 Bluetooth: hci0: Firmware Version: 255-255.255 Bluetooth: hci0: Waiting for firmware download to complete Bluetooth: hci0: Firmware loaded in 2111457 usecs Bluetooth: hci0: Waiting for device to boot Bluetooth: hci0: Device booted in 14560 usecs Bluetooth: hci0: Malformed MSFT vendor event: 0x02 Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-20-1-3.ddc Bluetooth: hci0: Applying Intel DDC parameters completed Bluetooth: hci0: Firmware revision 0.3 build 249 week 27 2023 Bluetooth: hci0: HCI LE Coded PHY feature bit is set, but its usage is not supported. Bluetooth: MGMT ver 1.22 First appeared on 6.8.0-38, 6.8.0-36 and earlier worked without issues. I suspect linux-firmware might be missing updates corresponding to changes in the kernel driver or a regression was introduced in the update. Machine: Dell XPS13-9350 Device: Intel AX200 Rev 1a (WiFi/Bluetooth combo) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/2073047/+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
