Luis, yes, the problem still exists in the Precise. For Quantal this oops too occurs. With 3.8-rc2-raring all work...
dmesg (3.2.0-36.56): [ 309.707808] BUG: unable to handle kernel NULL pointer dereference at (null) [ 309.707898] IP: [<ffffffff8103ec49>] __ticket_spin_lock+0x9/0x30 [ 309.707941] PGD 0 [ 309.707957] Oops: 0002 [#1] SMP [ 309.707980] CPU 0 [ 309.707991] Modules linked in: hidp btusb bnep rfcomm snd_hda_codec_realtek snd_hda_intel snd_hda_codec parport_pc snd_hwdep arc4 ppdev snd_pcm ath3k b43 snd_seq_midi bluetooth snd_rawmidi mmc_block uvcvideo snd_seq_midi_event snd_seq videodev joydev snd_timer snd_seq_device pcmcia mac80211 tifm_sd v4l2_compat_ioctl32 yenta_socket snd tifm_7xx1 pcmcia_rsrc tifm_core pcmcia_core acer_wmi soundcore cfg80211 psmouse snd_page_alloc serio_raw sparse_keymap bcma mac_hid lp parport usbhid hid i915 drm_kms_helper drm wmi i2c_algo_bit sky2 ssb video [ 309.708331] [ 309.708341] Pid: 2284, comm: khidpd_04580058 Not tainted 3.2.0-36-generic #56-Ubuntu Acer, inc. Aspire 5570 /Prespa1 [ 309.708401] RIP: 0010:[<ffffffff8103ec49>] [<ffffffff8103ec49>] __ticket_spin_lock+0x9/0x30 [ 309.708442] RSP: 0018:ffff88000a575d90 EFLAGS: 00010082 [ 309.708469] RAX: 0000000000010000 RBX: 0000000000000282 RCX: 0000000180150013 [ 309.708501] RDX: 0000000000000002 RSI: 0000000000000282 RDI: 0000000000000000 [ 309.708533] RBP: ffff88000a575d90 R08: 0000000000000001 R09: 0000000000000000 [ 309.708565] R10: 0000000000000000 R11: 0000000000000001 R12: ffff88000a575e80 [ 309.708597] R13: 0000000000000002 R14: ffff8800b9312470 R15: ffff8800b9311400 [ 309.708630] FS: 0000000000000000(0000) GS:ffff8800bf400000(0000) knlGS:0000000000000000 [ 309.708667] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 309.708694] CR2: 0000000000000000 CR3: 0000000001c05000 CR4: 00000000000006f0 [ 309.708726] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 309.708758] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 309.708791] Process khidpd_04580058 (pid: 2284, threadinfo ffff88000a574000, task ffff880014895c00) [ 309.708830] Stack: [ 309.708842] ffff88000a575da0 ffffffff8103ecf9 ffff88000a575dc0 ffffffff8165d69e [ 309.708883] 0000000000000000 ffff88000a575e80 ffff88000a575e00 ffffffff8108bb8a [ 309.708923] ffff88000ab7c400 ffff8800b9311470 ffff8800b9312470 000000000000007d [ 309.708963] Call Trace: [ 309.708978] [<ffffffff8103ecf9>] default_spin_lock_flags+0x9/0x10 [ 309.709010] [<ffffffff8165d69e>] _raw_spin_lock_irqsave+0x2e/0x40 [ 309.709042] [<ffffffff8108bb8a>] prepare_to_wait+0x2a/0x90 [ 309.709071] [<ffffffffa043611d>] hidp_session+0x3bd/0x510 [hidp] [ 309.709101] [<ffffffff810606a0>] ? try_to_wake_up+0x200/0x200 [ 309.709131] [<ffffffff810606a0>] ? try_to_wake_up+0x200/0x200 [ 309.709160] [<ffffffff8108bd20>] ? add_wait_queue+0x60/0x60 [ 309.709188] [<ffffffffa0435d60>] ? hidp_recv_ctrl_frame+0xf0/0xf0 [hidp] [ 309.709220] [<ffffffff8108b27c>] kthread+0x8c/0xa0 [ 309.709244] [<ffffffff81667b74>] kernel_thread_helper+0x4/0x10 [ 309.709272] [<ffffffff8108b1f0>] ? flush_kthread_worker+0xa0/0xa0 [ 309.709303] [<ffffffff81667b70>] ? gs_change+0x13/0x13 [ 309.709326] Code: 00 00 48 c7 c1 51 ea 03 81 48 c7 c2 4e ea 03 81 e9 dd fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 55 b8 00 00 01 00 48 89 e5 <f0> 0f c1 07 89 c2 c1 ea 10 66 39 c2 74 13 66 0f 1f 84 00 00 00 [ 309.709547] RIP [<ffffffff8103ec49>] __ticket_spin_lock+0x9/0x30 309.709580] RSP <ffff88000a575d90> [ 309.709596] CR2: 0000000000000000 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/922906 Title: Kernel Oops - BUG: unable to handle kernel NULL pointer dereference at 0000009c; EIP is at __ticket_spin_lock+0x8/0x30 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/922906/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
