[Bug 1744806] Re: Bluetooth is turned off at boot with latest update (bluez 5.37-0ubuntu5.2)

[Kai-Heng Feng]

I guess this is more likely to be a kernel bug, somehow
hci_debugfs_create_bredr() gets intertwined with DRM?

[    5.039111] Call Trace:
[    5.039115]  ? wait_woken+0x80/0x80
[    5.039130]  intel_atomic_commit+0x413/0x4b0 [i915]
[    5.039139]  ? drm_atomic_check_only+0x440/0x580 [drm]
[    5.039144]  ? handle_conflicting_encoders+0x284/0x2a0 [drm_kms_helper]
[    5.039151]  drm_atomic_commit+0x4b/0x50 [drm]
[    5.039155]  drm_atomic_helper_set_config+0x63/0xa0 [drm_kms_helper]
[    5.039161]  __drm_mode_set_config_internal+0x65/0x110 [drm]
[    5.039167]  drm_mode_setcrtc+0x4f6/0x640 [drm]
[    5.039169]  ? ww_mutex_unlock+0x26/0x30
[    5.039174]  ? drm_mode_getcrtc+0x180/0x180 [drm]
[    5.039179]  drm_ioctl_kernel+0x69/0xb0 [drm]
[    5.039184]  drm_ioctl+0x3e4/0x450 [drm]
[    5.039189]  ? drm_mode_getcrtc+0x180/0x180 [drm]
[    5.039201]  ? hci_debugfs_create_bredr+0x112/0x160 [bluetooth]
[    5.039203]  ? new_sync_read+0xdc/0x130
[    5.039205]  do_vfs_ioctl+0xa1/0x5f0
[    5.039206]  SyS_ioctl+0x79/0x90
[    5.039208]  entry_SYSCALL_64_fastpath+0x33/0xa3

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Title:
  Bluetooth is turned off at boot with latest update (bluez
  5.37-0ubuntu5.2)

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