[Bug 591298] Re: Bluetooth stops working after suspend/resume and requires reloading modules/restarting service to work again

[Patrick Meidl]

more diagnostics:

when I open the bluetooth system preferences, it first takes a long time
until the preferences come up (saying "starting bluetooth" in the
application panel). once the preferences appear, it says "bluetooth is
disabled". when I click on "enable bluetooth", I get this stack trace in
the kernel log:

Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756719] WARNING: at /build/buildd/linux-2.6.35/fs/sysfs/dir.c:451 sysfs_add_one+0xc5/0x130()
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756723] Hardware name: Latitude E6410
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756726] sysfs: cannot create duplicate filename '/class/bluetooth/hci0:11'
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756729] Modules linked in: hidp iptable_filter ip_tables x_tables binfmt_misc rfcomm sco bnep l2cap vboxnetadp vboxnetflt vboxdrv snd_hda_codec_nvhdmi joydev usbhid arc4 snd_hda_codec_idt snd_seq_midi snd_rawmidi iwlagn snd_seq_midi_event hid snd_seq snd_hda_intel nvidia(P) snd_seq_device snd_hda_codec iwlcore snd_hwdep mac80211 snd_pcm uvcvideo btusb ppdev cfg80211 snd_timer bluetooth dcdbas videodev v4l1_compat v4l2_compat_ioctl32 dell_wmi snd psmouse soundcore serio_raw intel_agp snd_page_alloc parport_pc intel_ips video output lp parport sdhci_pci sdhci firewire_ohci ahci led_class e1000e firewire_core libahci crc_itu_t
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756805] Pid: 2903, comm: hci0 Tainted: P      D W   2.6.35-22-generic #35-Ubuntu
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756808] Call Trace:
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756872]  [<ffffffff8106077f>] warn_slowpath_common+0x7f/0xc0
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756877]  [<ffffffff81060876>] warn_slowpath_fmt+0x46/0x50
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756883]  [<ffffffff811bf6a5>] sysfs_add_one+0xc5/0x130
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756888]  [<ffffffff811bfefb>] sysfs_do_create_link+0x13b/0x210
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756894]  [<ffffffff811c0003>] sysfs_create_link+0x13/0x20
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756903]  [<ffffffff813846ac>] device_add_class_symlinks+0x6c/0x100
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756908]  [<ffffffff811be126>] ? sysfs_create_file+0x26/0x30
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756914]  [<ffffffff813855d8>] device_add+0x238/0x440
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756919]  [<ffffffff81384f91>] ? device_private_init+0x71/0x80
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756932]  [<ffffffffa0c1de0b>] add_conn+0x5b/0xe0 [bluetooth]
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756941]  [<ffffffffa0c1ddb0>] ? add_conn+0x0/0xe0 [bluetooth]
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756949]  [<ffffffff8107a765>] run_workqueue+0xc5/0x1a0
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756955]  [<ffffffff8107a8e3>] worker_thread+0xa3/0x110
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756961]  [<ffffffff8107f610>] ? autoremove_wake_function+0x0/0x40
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756966]  [<ffffffff8107a840>] ? worker_thread+0x0/0x110
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756971]  [<ffffffff8107f0b6>] kthread+0x96/0xa0
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756978]  [<ffffffff8100aee4>] kernel_thread_helper+0x4/0x10
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756983]  [<ffffffff8107f020>] ? kthread+0x0/0xa0
Oct 21 09:30:32 cemmnbk80 kernel: [ 2138.756988]  [<ffffffff8100aee0>] ? kernel_thread_helper+0x0/0x10

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Bluetooth stops working after suspend/resume and requires reloading modules/restarting service to work again
https://bugs.launchpad.net/bugs/591298
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