I have this issue too with the same laptop and found a workaround. There's a lot of discussion in bugs 1871794 and 1878194 about this (and possibly other Bluetooth chipsets).
It looks like the /lib/firmware/intel/ibt-* firmware and config files are somehow wrong and causing the issue. This is the problematic log section Oct 12 08:50:41 xxxxxxxx kernel: [ 8.616248] Bluetooth: hci0: Waiting for firmware download to complete Oct 12 08:50:41 xxxxxxxx kernel: [ 8.616360] Bluetooth: hci0: Firmware loaded in 1494493 usecs Oct 12 08:50:41 xxxxxxxx kernel: [ 8.616387] Bluetooth: hci0: Waiting for device to boot Oct 12 08:50:41 xxxxxxxx kernel: [ 8.630437] Bluetooth: hci0: Device booted in 13726 usecs Oct 12 08:50:41 xxxxxxxx kernel: [ 8.631010] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-20-1-3.ddc Oct 12 08:50:41 xxxxxxxx kernel: [ 8.631437] Bluetooth: hci0: Failed to send Intel_Write_DDC (-22) I copied all the /lib/firmware/intel/ibt-* files from an 18.04 installation, regenerated the initramfs, and rebooted. At first I thought it didn't work, but it turns out it doesn't reload the firmware and config on every boot, only, it seems, once a day. The next day I rebooted again and it loaded the firmware, but I didn't get the "Failed to send Intel_Write_DDC" error this time. Oct 13 08:51:42 brad-XPS kernel: [ 8.651453] Bluetooth: hci0: Waiting for firmware download to complete Oct 13 08:51:42 brad-XPS kernel: [ 8.652395] Bluetooth: hci0: Firmware loaded in 1506591 usecs Oct 13 08:51:42 brad-XPS kernel: [ 8.652425] Bluetooth: hci0: Waiting for device to boot Oct 13 08:51:42 brad-XPS kernel: [ 8.665356] Bluetooth: hci0: Device booted in 12636 usecs Oct 13 08:51:42 brad-XPS kernel: [ 8.665485] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-20-1-3.ddc -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1893538 Title: No bluetooth on Dell XPS 7390 with AX200 after upgrade to 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1893538/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
