[Bug 976288] [NEW] Bluetooth adapter fails to work after resume

Alexander Hall alex.d.hall at gmail.com
Sun Apr 8 00:15:28 UTC 2012

Public bug reported:

Device is recognized by hcitool/hciconfig. Bluetooth GUI indicates that
Bluetooth is disabled, and cannot be enabled. There is a crash log with
a stack trace in dmesg (found in "CurrentDmesg.txt", starting at
9822.016244). Using patched kernel to solve shutdown/resume issue from
here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/944772

Important/Relevant lines from Dmesg:

[11779.955253] WARNING: at /home/jsalisbury/bugs/lp944772/ubuntu-precise/fs/sysfs/dir.c:481 sysfs_add_one+0xc0/0xf0()
[11779.955266] sysfs: cannot create duplicate filename '/class/bluetooth/hci0:21'
[11779.955693] Bluetooth: Failed to register connection device
[11780.212496] BUG: unable to handle kernel NULL pointer dereference at 0000000000000079

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: bluetooth (not installed)
ProcVersionSignature: Ubuntu 3.2.0-22.35~lp944772-generic 3.2.14
Uname: Linux 3.2.0-22-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0-0ubuntu4
Architecture: amd64
Date: Sat Apr  7 20:04:39 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
InterestingModules: btusb bnep rfcomm bluetooth
MachineType: Hewlett-Packard HP Pavilion dv6700 Notebook PC
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-22-generic root=UUID=29806a0e-3742-4e63-b441-7b06a74c1231 ro quiet splash vt.handoff=7
SourcePackage: bluez
UpgradeStatus: Upgraded to precise on 2012-04-01 (6 days ago)
dmi.bios.date: 06/16/2008
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.58
dmi.board.name: 30D2
dmi.board.vendor: Quanta
dmi.board.version: 79.2E
dmi.chassis.type: 10
dmi.chassis.vendor: Quanta
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.58:bd06/16/2008:svnHewlett-Packard:pnHPPaviliondv6700NotebookPC:pvrRev1:rvnQuanta:rn30D2:rvr79.2E:cvnQuanta:ct10:cvrN/A:
dmi.product.name: HP Pavilion dv6700 Notebook PC
dmi.product.version: Rev 1
dmi.sys.vendor: Hewlett-Packard

** Affects: bluez (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed

** Tags: amd64 apport-bug bluetooth crash null pointer precise sysfs

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